1-part, ready to use. DAMP-PROOFING FLOORS Apply by brush, a minimum of 2 coats, each at 0. Tile brands such as Bal, Ardex, Tops, etc all sell tile primers with fancy names ! Can simply use SBR diluted, follow instructions on bottle, likely to be 1-4 water, then apply 2 coats. When laying a solid wood, Real Wood or laminate floor over a cement-based sub-floor, a paintable damp proof membrane should be used to prevent moisture penetrating from below. It's just taken 5 days to dry (still tacky) and i'm being told we can't put self levelling compound on it, it needs to be screed. Apply the first coat in one direction, ensuring that the material is worked well into the substrate. This enables earlier access onto the floor for the application of screeds, coatings and other floor coverings including tiles, vinyl, wood and carpets. It’s important these sheets are stable when walked on and laid so they don’t rock about on uneven sub-floors. Or you could use a visqueen sheet dpm It's up to you but I'd do the later. you risk voiding the warranty of the flooring by not installing on a dust free, flat smooth surface. Well suited for use as a water and water proof barrier, beneath raised access floors, in plant rooms and bunded areas. Information Liquid Waterproof Membrane. It will tackle residual moisture in concrete up to 6% C. IKOpro Synthaprufe Trade is a blend of bitumen emulsion and synthetic rubber latex and can be used to damp proof structure below, at or above ground level. It is available in black or white with a consistency similar to that of thick emulsion paint. OR. Flooring FAQs. Liquid DPM for walls & floors. Drybase® Liquid-Applied DPM is a single-pack barrier coating for above ground use. This water-based compound can be applied to damp concrete floor slabs, screeds and walls. Most important thing here is to prime the bitumen and concrete repairs to get a good bond between tile adhesive and floors. I need to put down a damp proof membrane and self levelling compound on top of that. Once applied, it cures to form a flexible and elastic membrane that. Nitoflor DPM permits early overlaying with vinyls,. a suitable primer (depending on sub floor) should also be used. Information ARDEX DPM 1 C. Once applied, the product cures to form a membrane that is both flexible and elastic. It is ideal for use on damp floors and walls, before the application of floor and wall coverings. Ready-to-use. Wykamol Technoseal DPM Damp Proof Paint. 22 Apr 2013. 16. Upper floors are airtight timeframe. Acts as a water proofer for floors and walls, above ground structures and. 2. 15 W/m. Our costs are ballpark averages – get a local tradesperson to quote now. (DPM) above or below a ground floor slab to stop ground moisture reaching the upper surface of the floor. T1000 Stampable OverlayFor use with resurfacing concrete floors and hardscapes. 11 - 0. , Jan 22, 2021. One Abocrete kit with sand covers approximately 28 sq. This barrier is intended to stop moisture passing from one to the other. . Drybase White Liquid Damp Proof Membrane - 1L. Liquid Composition. Liquid epoxy DPMs are ideal for concrete floors, such as garages, where the original damp proof membrane is missing or has broken down. I wanted to self-level the floor using mapai ultimate leveller 1210 and Secrete Ulitmate Primer for adhesion. Consideration should be given to applying the DPM to the top of the. An ARDEX liquid Damp Proof Membrane will protect the floorcovering installation from residual construction moisture and rising damp, where the highest measurable. • Protects walls and floors from water ingress and dampness. Proposed floor is pitch pine boards secret-nailed to 2 x 2 inch battens with insulation between, onto a concrete floor not known to have a DPM under it; therefore, DPM to go under the battens. Jord86 Screwfix Select. :thumbsup. < 2 Year Storage. The DPM should: have sealed laps of at least 300mm wide. • 1 or 2 coat application. Liquid DPM for concrete floor as a rising damp treatment. Installing a DPM might introduce problems that don't currently exist plus I have to pay for it. Drybase Liquid-Applied DPM is a single-component two-coat paintable damp-proof coating that is easily applied to substrates by brush, roller, or spray. Checkatrade offers the following guide: Electric underfloor heating cost. The edges of the DPM should have been flopped up the walls, say, 300mm and later trimmed back to suit. You are essentially painting a. Apply ARDEX DPM 1 C to protect the floorcovering installation from residual construction moisture and ground bearing moisture. £. To help determine the cost of a screed floor let’s look at the average prices people pay. . Drybase Liquid-Applied DPM is water-. Resistant to frost and salt attack. Ready to use. The liquid membrane forms a strong seal and makes a permeable layer to enable moisture to evaporate off. Clear. g. Made from recycled materials. Use on concrete floors as an alternative to polythene. thick. A damp-proof membrane is a layer of material usually laid below concrete floors during construction. If I put a damp proof membrane down first, like a paintable one like Wickes paintable bitumen or Drybase Dpm in white, would products like this work under self levelling compound? I bought 16mm deep rubber gym tiles to finish the floor. An ARDEX Damp Proof Membrane will protect the floorcovering. I have an uneven concrete floor inside. Don't use a mix of manufacturers products because if you asked for a site visit due a failure, they'd automatically walk away. It needs to have a further coating to protect it from damage. Best bet is pre latex screed the floor with Ardex NA, them use. And yes you can level the floor after. Total carbon usage. Temperature, air flow and type of mix, being just a few. An ARDEX Damp Proof Membrane will protect the floorcovering installation from residual construction moisture and ground water vapour, where readings of up to 98% RH are measured. Hi, We've just finished pulling up old quarry tiles ready to fit new Porcelain tiles throughout! Had to remove quarry's due to levels of external doors, were unsure what the subfloor is beneath the quarry's, I believe the property is prone to rising damp seeping through subfloor as no DPM. It can be used for screeds, renders, laminate, joists and flood resilience. Size. Drybase® Liquid-Applied DPM Is suitable for use on solid floors, embedded timbers and walls. – When applying over 6mm of levelling, 2 primer coats may be required. A vapour barrier, on the other hand, is a damp proofing product attached to a wood floor underlay to reduce moisture passage. Showing 1–15 of 21 results. £100 - £600. The product is applied in two coats. Bit confused with all the different products and combinations though. The liquid membrane forms a strong seal and makes a permeable layer to enable moisture to evaporate off. Drybase 2mm Plaster Membrane Mesh (2m x 20m) - Low-Profile Plaster Membrane For Use on Damp Walls. OR. Polycote DPM Primer is a superb twin pack high-performance epoxy coating that is designed to penetrate into the concrete and completely lock the surface from rising damp. Waterproof. Situation is I've got a concrete kitchen floor with thermoplastic tiles set on black (bitumen?) adhesive. How to Damp proof a floor and walls using synthaproof as a damp proof membrane is shown in this tutorial. Ask the expert: Can a Floor Levelling Compound be applied underneath a WSM? The nature of a subfloor impacts whether a WSM or levelling compound should be applied first. 1- Subfloor should be cleaned and as dry as possible. , 1/8 in. Order Bostik Aquaprufe Flexible Damp-Proofer & Waterproofer Black 5Ltr at Screwfix. Go to product. Facades Tile Fixing Flooring Systems Technical Mortars Check all Uncheck all. • 5L tin offers coverage of approximately 6. Drybase® Liquid-Applied DPM is a single-pack barrier coating for above ground use. There is a DPM under the concrete as well, but primarily to keep the. Liquid Epoxy Damp Proof Membrane - 5kg. The epoxy DPM comes as a two-component system. Sovereign Liquid DPM & Gas Barrier (DrySure) can be used to protect most building surfaces from the effects of liquid and water vapour therefore suitable for providing a DPM on floors and in walls. £ 87. 2. With a consistency similar to that of thick emulsion paint, it's suitable for use on solid floors, embedded timbers and walls. Can be used as a Damp Proof Membrane on sub-floors not under hydrostatic pressure. 1st post for me but desperately after some advice as to why my self levelling screed is cracking. It is available in black or white with a consistency similar to that of thick emulsion paint. Insulation sheets and steel laid on top of plastic membrane. P. ARDEX DPM is a solvent free, low viscosity, two-component epoxy resin. 8 Apr 2013. Capital Valley DPMs are also extremely durable. It did not cause any problems before (I took off the old screed and tiled floor already). , Jan 22, 2021. I’d look up the manufacturers guidelines if I were you because if the floor warps at all then you’ll have no recourse with the manufacturers as they’ll say there was moisture present. Apply this liquid membrane to your subfloor to prevent residual moisture from the concrete penetrating your natural wood floor. When using as a liquid DPM make sure the substrate is load-bearing, and that any laitance is removed mechanically (common on new concrete floors/screeds). A damp proof membrane is primarily used on solid material floor constructions and it is designed to act as a waterproof barrier, preventing moisture from travelling into other. A damp-proof membrane is a layer of material usually laid below concrete floors during construction. 50 /sqm. An MVS, is a moisture. Guarantees the early laying of all floorcoverings. Acts as a bonding agent for plaster and curing agent for concrete. May be used internally or externally. Before applying the damp proof paint, stir the contents of the bucket well. It is available in black or white with a consistency similar to that of thick emulsion paint. Provides a flexible and resilient barrier to penetrating damp on walls and floors. The easy application is carried out in two coats with a brush or roller. Overall, investing in a liquid damp proof membrane for your concrete floor is an excellent way to protect your investment and ensure your floors last for years to come. It is black when wet, but becomes black when dry. 60 per L. Last edited: Sep 2, 2010. The external floor level (concrete) is about 45cm higher than the internal floor level. In older properties built prior to the 1950’s normally the solum areas are unsealed and are possibly damp. Applying Damp Proof Membranes. Upgrade your underfloor heating installation with one of our high-quality liquid DPM products from top brands Ultra Floor, Tilemaster Adhesives, Ardex and Mapei and experience the ultimate in moisture. Drybase® Liquid-Applied DPM is a single-pack barrier coating for above ground use. Compatible with all SikaBond wood floor adhesives. g. The readings I have from the floor hygrometer indicate there is a lot of residual dampness still in the screed - it probably has nowhere to go, if as suspected there is a DPM underneath it. That’s assuming quarry tiles are in good condition, no loose tiles, no known problems with major damp, no issue with raising floor height by leaving tiles in place, etc. 22 August 2019 at 10:27AM. Liquid epoxy DPM is commonly used as a remedial solution for existing concrete floors. Answered 27th Feb 2012. Liquid Epoxy Damp Proof Membrane 5kg (Metal Tin) Rating: 100%. The dpm resin, is a sticky gooey 2 part epoxy based liquid to be precise. The stand-off studs create an air gap. Damp proof membranes can be used to help resolve damp issues which already. If there is no dpm above the concrete floor a vapour control layer, such as polyethylene, should be placed between the. Kind regards. Liquid dpm’s are used to protect the walls and floors of a building from moisture and rising damp in just a couple of coats. 99Inc Vat. – When applying over 6mm of levelling, 2 primer coats may be required. It is supplied ready to use. For a self-levelling screed a system such as Flowcrete UK’s Hydraseal would be used. With a consistency similar to that of thick emulsion paint, it's suitable for use on solid floors, embedded timbers and walls. Can be used as a damp proof membrane and as part of a designed structural waterproofing system. Apply a coat of surface liquid DPM to the tiles like Ardex DPM 1c or stopgap F77 then prime and screed. Once dry, Arditex NA, a latex based self levelling compound, was applied. Sika Rapid DPM is intended for priming and sealing absorbent and non-absorbent subfloors, Also suitable for consolidating weak cement screed and isolating old adhesive residues. substrate by the level / height of liquid. #1. Drybase Liquid-Applied DPM (1 L White) (In stock) ☆ ☆ ☆ ☆ ☆. 4- When dry (24hrs+) you can give first coat of dpm (F75) 5- Second coat of dpm (f75) when first is dry. 99 Inc Vat. applying 2 coats of Drybase® Liquid DPM. Easy to use by by brush and Industrial Roller Sleeve; Approximate Application rate. This prevents moisture from the screed attacking the wood flooring and ultimately ruining it. Information ARDEX DPM 1 C. In most situations, it is advised that if a Waterproof Surface Membrane (WSM) is required, it is applied directly to a subfloor prior to the application of a levelling compound. Conclusion. New NHBC regulation comes into. 5kg Our Epoxy Damp Proof Membrane is a two-component, solvent free, low odour epoxy resin membrane that is tolerant of residual moisture in concrete floors. 75 m2 1. • Weatherproof protection for walls, above-ground structures and foundations. Sovereign Epoxy DPM is a solvent free two-part resin that chemically cures to provide a surface membrane. Share What is a liquid DPM? A liquid DPM (damp proof membrane) acts as a barrier to suppress residual moisture in a subfloor. Epoxy Damp Proof Membrane Epoxy damp proof membrane is a coating that suppresses residual moisture in cement and concrete floors to speed up the process of installing floor coverings. Liquid resin primer and dpmthen any flooring can be laid over this. £18 - £22 per m2. membrane (DPM) within the floor structure. £ 21. It is available in black or white with a consistency similar to that of thick emulsion paint. Ready to tile in 4 hours. Wait until the first coat of liquid DPM is touch-dry - approximately 15 to 30 minutes at 20°C – before applying the second coat at right angles to the. For areas where the coating needs to be trafficable, a tougher two-part epoxy coating, such as Drybase ECS Epoxy Floor Coating, should be used. 2 coats SBR. Applying Damp Proof Membranes. 00 Inc VAT Qty Add to Basket Read More A two-component, solvent free, low odour liquid epoxy DPM that is tolerant of residual moisture in concrete floors. To be honest it’s worth having some sort of moisture suppressant put down just to make sure. ARDEX DPM has excellent. Hello, hoping someone can help. Ideal for use where there is no functioning structural DPM (common in older properties). 7. Spoke to building control who confirmed that the bitumen is the only form of dpm. 0. Walkable in 6 hours. Lay and level the concrete slab, allowing sufficient time to dry out, as per BS 8203. Background: I am currently renovating a 1950’s property with no DPM. £2,000. . Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most. If you are using full contact adhesive to stick down your new wooden floor, a broadcasting of Kiln dried sand as you apply the 3rd coat of the Liquid DPM, will act as a superb adhesion promoter, if for example you use Lecol 5500 adhesive or Sika. Rapid drying. Withstands reverse hydrostatic pressure to 4. Hi Pete, I have the answer. He wasn't keen on laying a floor as it was, and even said that if we laid a liquid DPM with an additional plastic DPM on top, then the water would probably pass through both DPM layers. PU280-S. 3. RFC Liquid Damp Proof Membrane (DPM) is a professional 2-component applied surface primer. It is suitable for use as a one or two application depending on the moisture content of the floor. Apply with simple hand tools or with a brush, paint roller, or squeegee. 4- When dry (24hrs+) you can give first coat of dpm (F75) 5- Second coat of dpm (f75. Add to basket. I'm hesitant to lay self levelling. 30811761. Other DPM’s may be considered if they have appropriate third-party certification and are installed in accordanceDrybase Liquid-Applied Damp-Proof Membrane High-strength paintable damp-proof coating for a wide variety of applications. wet-rooms and concrete floors. Self levelling compound. Design considerations General When choosing a PIR board for a floor insulation project, care should be taken to ensure: That the product is suitable for the intended application (check the individual manufacturer’s data sheet). Dig it all up (Its possibly up to 50mm thick) Then lay DPM/Visqueen sheets tanked up the walls and lay new concrete or use an epoxy liquid DPM tanked up the walls and lay a deep base screed. It can also be used to isolate embedded timber joists or to act as a. It is laid on top of a subfloor to keep moisture at bay and ensure natural timber. I have a fairly damp & uneven concrete floor, probably about 20 years old or more. Screwfix Select. • Apply a primer and then pour a latex or water-based levelling compound to a minimum. This is one of the reasons liquid DPM’s have emerged as a more advanced and popular solution. Wet underfloor heating. weberfloor DPM is a two-component epoxy based chemical damp proof membrane that is capable of being applied in one coat, dependent upon the condition of the substrate and quality of workmanship to ensure full coverage is achieved at the required thickness. Moisture-sensitive floorings including timber-based flooring panels (particularly those of chipboard) can be seriously disrupted or damaged by water vapour arising from moisture within the floor construction. Safe – no solvents and non-flammable. Resin Floor Coatings UK (RFC UK) offer floor and wall coatings, screeds, resin floor paints, primers, repair and cleaning products to the home and commercial markets. The waterproof paint membrane dries to a flexible. Ipswich • Member since 13 Mar 2020 • 65 jobs, 100% positive feedback. CaCl Test. In addition to our office based Technical Department, we employ a highly experienced team of 25 Area Sales, Contract and Business Development Managers, who are available nationally to offer advice, support and training, not just over the phone, but in person and on-site. Test Area Because of the wide variety of possible substrates and site conditions, it is always advisable to check adhesion to the background by testing on a sample area before starting any job. The build up of a ground floor would typically be: DPM, Slab, Insulation, Vapour Barrier, Floor Screed. Hi all, this weekend I plan on applying a liquid DPM and self levelling compound to my garage floor slab. These attributes combined produce a unique multi-purpose liquid DPM with dozens of potential applications including but not limited to: • Damp proofing storage basements, where other tanking methods too costly • Damp proof paint for walls and ceilings • Concrete Floors: as a tough liquid floor DPM applied above or below screeds. 33. The opposite really. If there was no dpm I would suggest a uniformal distribution across the whole floor. Applied by roller or squeegee. By choosing the right product for your application and following the manufacturer’s instructions carefully, you can enjoy peace of mind knowing that your concrete floors will. Damp Proof Membrane (DPM) is used to create a barrier between a concrete or screed subfloor and a wood floor. Produced from Recycled Material. take account of possible differential. evilgoose Posts: 532 Forumite. Can be applied to damp surfaces. Also acts as a waterproofer for walls, above ground structures and foundations. Drybase Liquid-Applied DPM is water-based. A water based product would have taken a month to dry, but. DIYDave. BAL DPM is resistant to water, chemicals, grease and pollutants, and can be used internally or externally either as a DPM, primer, waterproofer or residual m. [3] 4. A damp proof membrane creates a barrier to prevent moisture from rising and damaging or affecting an area. I agree, looking at the liquid DPM's that Wickes do I'd say you'll struggle to get someone to guarantee tiling on them would be ok, sorry!Sika Code 487004. I like. Our liquid waterproof membrane is a liquid DPM that makes your floors durable and water-resistant. Features and benefits: One product solution for complete waterproofing. Approximate Coverage. Easy Handling & Installation. Once set,. SGAN. The specific liquid DPM system will depend on the type of substrate or screed. Fully isolate the dampness in the floor using a surface Damp Proof Membrane (DPM) How much should DPM overlap? The purpose of DPM Care must be taken to ensure a) there are no holes or tears in the sheet that could allow water penetration and b) there is a sufficient overlap of sheets by at least 150mm should more than one sheet be required. £ 115. Larsen Universal Epoxy Flooring Damp Proof Membrane. Add to basket. MAPEPROOF ONE COAT. I'm looking for opinions on the best self leveling screed to use on my slightly wonky concrete garage floor. If its not right. WP60 Liquid DPM. No corner reinforcements required. Drybase Liquid-Applied DPM is a single-pack barrier coating that is supplied ready to use. 2 coats liquid DPM. It is true that a 100mm concrete screed will take around three and a half months to dry out (1mm per day) depending on time of year, whether a dpm or insulation was laid underneath etc, so it's a guesstimate !! In our game, dry actually means moisture levels are less than 75% so your concrete floor is only 25% dry and will release moisture for. DIYDave. 3. Test Area Because of the wide variety of possible substrates and site conditions, it is always advisable to check adhesion to the background by testing on a sample area before starting any job. 100% solids, high build coating. The best solution is to uplift the tiles and dispose of accordingly, then use a specialist screed such as F-Ball Stopgap 1200 straight over the bitumen. We've removed them and applied Wickes liquid dpm (bitumen based) to reseal the floor. Ideal for use where there is no functioning structural DPM (common in older properties). BAL DPM can be used on anhydrite screeds up to 87% RH. Once applied, the product cures to form a membrane that is flexible and elastic. For Interior & Exterior Use. I wanted to fit LVT flooring or self adhesive vinyl tiles. € 80. Non-flammable. Self levelling and liquid damp proof membrane. Before that it was F ball Stopgap green bag with 114 liquid 2 coats F75 DPM Green bag again. Then laid down homebase underlay with built in vapour barrier and laminate and this floor seems fine but for room 2 i just painted with dpm as was already tiled with old fashioned vinyl floor tiles and looked level and then. Walls have already set me back without furniture and flooring for 7 months so dont want something thay takes ages. It is supplied ready to use. How-to video with step-by-step instruction on how to apply liquid damp proofing, priming and then self leveling. Be careful as some of those types of tiles contain asbestos. For external tiled areas, we would always advice on the use of a capillary passive drainage system like BAL’s new external tiling systems which ensure the rapid drainage of tiled surfaces. Damp survey. Drybase® Liquid-Applied DPM Is suitable for use on solid floors, embedded timbers and walls. Plenty of cement/latex/fibre based. The floor under each tile i have removed has been visibly wet, but has dried in a few hours of the tile being lifted. Country. When fast-track tiling is required consider the use of a Damp Proof Membrane such as BAL DPM. Sikabond Rapid Liquid DPM for Wood Flooring. The installation of a liquid damp proof membrane is a vital stage in the construction process, for both new builds and refurbishment work where a structural DPM may be missing or damaged, or where residual construction moisture is present in the floor. After hardening the ARDEX DPM produces a membrane with high inherent strength and excellent bond strength to appropriate substrates including very damp concrete and screeds. For Interior & Exterior Use. Out of stock. . Our easy to install range is available in various thicknesses up to 0. It is available in black or white with a consistency similar to that of thick emulsion paint. Yes a liquid damp proofing product from most building merchants for masonry works will be suitable. Damp most often comes up through the floor. When using as a liquid DPM make sure the substrate is load-bearing, and that any laitance is removed mechanically (common on new concrete floors/screeds). The engineer (who is a bit belt and braces) recommended a block and beam floor supported by new foundations so as not to add extra load to the existing 1930s foundations. Self levelling compound. Free from water and free from solvents, this primer allows for a trouble-free installation as no swelling of the wood is to be feared. Consult adhesive manufacturer. DPM Floor Membrane above Concrete Two popular options are liquid epoxy DPM and slimline floor membranes. Polymer based liquid DPM to resist the penetration of gases (including radon), vapours and liquids. Browse damp-proof membrane products from Toolstation here. The biggest advantage of using a liquid Damp Proof course, is that you do not have to rip up concrete floors. Waterproof. I need to self level to the depth of 30mm graduating to 0mm over a 4m squared area. Our costs are ballpark averages – get a local tradesperson to quote now. Suitable for all areas of a home, DPM is available in a choice of fabric and liquid forms. Drybase® Liquid applied DPM is a single pack barrier coating for above ground use. Discover important FAQs including what is liquid DPM, what is the best liquid DPM and more. Before starting the installation. The upper half is an empty cavity. Screwfix Select. For the best results, leave your screed to dry and fully cure for around 28 days, however a minimum of 7 days should suffice if you don’t have time to spare. Coverage - Typically 10 - 20 m 2 per 5 kg pack (based on two coats). All you need to do is brush or roller it straight from the tub on to a sound, clean masonry surface to create a flexible damp proof and vapour. £12 - £16 per m2. Then SL, this will take care of the craters and uneven sections from remaining tile adhesive. A DPM on an external tiled area will protect moisture sensitive stone such as granite from staining due to rising ground floor water, as well as rain water. DIYDave. 100% epoxy solids. Hi, I bought a new build last November, im just after a little info regarding whether to paint on a DPM or not? When the slab was poured back in June last year, the builder put in a dpm then insulation boards, radon protector thingy me bob , then more thick plastic sheeting, re bar/Mesh then the concrete was poured. 5 8 ARDEX WPM 405. It is ideal for use on damp floors and walls. ARDEX WPM 300 is a two component water based epoxy polyamide membrane/barrier coating. Drying time of any brand and type of liquid DPM varies according to the application circumstances, e. This Epoxy DPM is a two-component, solvent-free, low odour epoxy resin membrane that is tolerant of residual moisture in concrete floors. Ideal for fast track installations, apply ARDEX DPM 1 C R to protect the floorcovering installation from residual construction moisture and ground water vapour. Covers approx. Share What is a liquid DPM? A liquid DPM (damp proof membrane) acts as a barrier to suppress residual moisture in a subfloor. Coverage: 1 gallon of Abocrete, without sand or aggregate, covers 80 sq. Two-component, single coat application, damp proof membrane for controlling residual and constructional moisture in cementitious substrates. Whats people lookup in this blog: Liquid Damp Proof Membrane For Concrete Floor; Liquid Moisture Barrier For Concrete FloorsPermaSEAL Liquid DPM is a high quality, ready to use, liquid applied damp proof membrane, designed to be used on floors and walls to provide a quick drying, highly flexible waterproof barrier. Who places the screed. The product may also be covered. 45 minutes at 50% r. The liquid membrane forms a strong seal and makes a permeable layer to enable moisture to evaporate off. Superfl ex Bathroom & Balcony Two Part ARDEX WPM 155 Undertile PU Acrylic Hybrid Membrane ARDEX WPM 157 Polyurethane DPM 157 ARDEX WPM 163 Sheltercoat DPM 163 Penetrative Sealer ARDEX WPM 256 HydrEpoxy 256. FREE next day delivery available, free collection in. If a radon barrier is required, lay this over the grouting layer and extend it. Liquid Damp-Proofing Systems.