Permagard - Providing Solutions. Add to Cart. sales@ardexaustralia. TWS voted number 1 in Australia. For a complete building envelope solution to waterproofing & roofing membranes, ARDEX is your best choice. Metal, timber decks & terraces. Choose from liquid waterproofing membranes which can be applied for both waterproofing and as a crack isolation membrane / anti fracture. 5m2 @ 1. Instead, we use a flexi. Roofing Membranes. Suitable for external use. Kerdi-Band 16. Waterproofing membrane systems are available as either post-applied or pre-applied products for use in either positive-side, negative-side, or blind-side applications. Fixr details that the cost of waterproofing a basement is approximately between $3,000 to $7,000. Bituminous waterproofing membrane: Bituminous waterproofing membranes are a popular method used for low-slope roofs due to their confirmed efficiency, the bituminous waterproofing membranes have a layer and a torch on the self-adhesive membranes. The membrane also has a waterproof film that keeps water from seeping through it as water sits on the back of the membrane. Ready to tile over in just 4 hours. Regulatory Compliance Testing. Find Bastion 4L Exterior Waterproof Membrane at Bunnings. 40. Yet, each brand/product can differ, so it is vital to read the product details. Contact our moisture control and management experts today at 214. damp proof membrane for external walls. 3580700. (Reference must be made to the manufacturer’s technical data sheet for instructions on use of particular products. Compare. 1 Waterproofing membrane systems for exterior use, and 2. Our Stone & Concrete Care – Diamond-Tough, indoor and outdoor range of sealers to enhance, protect and enjoy. Model # HE100GUSA918 Store SKU # 1001104906. Recognised products such as our Dampfix range for interior household waterproofing, our bituminous Black Paint and acrylic Flexacryl products for waterproof roofing repairs and our roller-applied Ultraseal polyurethane are all. Add to Cart. All these products are water-resistant and help to seal the surface against moisture. Flash membrane up over pre-treated coves and corners, so such areas have two layers of HYDRO BAN Quick Cure liquid. Bastion 100mm x 50m Waterproof Reinforcing Fabric (0) $19. 2. Compatible with a range of tile adhesives, renders and toppings, Gripset Betta Under Tile Waterproofing Membrane is available in light blue. Type : Modified Acrylic Appearance : Milky White Liquid Practical Coverage (mixture): Vertical Waterproofing - 10 sqm / 4L / coat. 5L. Thermoplastic Membrane. Unlike other products, Clear Waterproofing Membranes remain suitable for tiles made from hard materials such as stones, concrete, concrete slabs, precast and cement sheeting. "Waterproof paint is NOT the same as a waterproofing membrane. 5. Since the tile installation will be able to move independently from the substrate below. : £ 445. Equipped with Microban® antimicrobial technology to protect the waterproofing membrane † HYDRO BAN® XP can be flood tested in 2 hours when the waterproofing membrane is cured and the substrate is 70°F (21°C) and 50% RH or greater for 2 hours. Appraised as an Alternative Solution in terms of the New Zealand Building Code. Compare. Let dry and sand smooth. As they come in basic colours, they can provide aesthetic appeal. HIGHEST QUALITY MEMBRANES - LOW PRICE FAST DELIVERY AUSTRALIA WIDE. Water based polyurethane. waterproofing and sealing australia since 1957 Search products -'what-for-where. 83. Compare quotes from local foundation experts. Gripset Betta Bitumen Rubber Waterproofing Membrane 15L. Safety Data Sheet (SDS) PDF - 116 KB (en) Sika® Tite Undertile is a highly flexible, fast-drying, Styrene Butadiene Rubber latex modified waterproofing membrane. AquaBlock is also a. Install the second ply of membrane in accordance with the manufacturer’s requirements. Liquid membrane waterproofing costs, on average, $4. Poor waterproofing work. Every material you can use has its pros and cons. 2) Sikalastic -320 NS (about $220 for 5 gallon) 3) wrmeadows Mel-Rol LM (about $168 for 5 gallon) 4) Tremco Tremproof 201 or Tremproof 260 or Tremproof 250GC (about $225-$250 for 5 gallon) 5) Henry Blueskin WP 200 (peel. A pre-mixed waterbased microfibre reinforced acrylic flexible waterproofing membrane that is easily applied with a brush to form a resilient waterproof. It is available in membranes with two thicknesses: 45 mils and 60 mils. Pond Sealer Colours are available in Black, Sandstone and Blue. Pembakaran bisa dilakukan dengan cara membentangkan. Substrate: Waterproofing can be applied over various substrates such as concrete, cement fiberboards, gypsum boards or wood. Roofing Membranes. Ensure surfaces are clean and dust free. Exterior Grade Waterproofing is exceptionally tough, durable and flexible and capable of accommodating structural movement in areas of non-exposed pedestrian traffic or in applications under screeds and toppings. How to apply waterproofing membrane using bandage. Each material has advantages for your needs. Waterproofing systems protect against water intrusion with the goal of maintaining long-term structural durability, surface protection, prevention of mold and mildew buildup due to dampness, and ultimately occupant comfort in buildings. The best solutions are interior or exterior drain tiles and an exterior waterproofing membrane. Most common substrates; concrete, cement renders, screed, lightweight blocks, prepared metal surfaces, building boards approved for wet areas, such as compressed fibre cement sheeting. 2. Easy and fast installation to foundation walls. Capital Valley Plastics Ltd Damp-Proof Membrane Black 1200ga 25m x 4m (47163) (55) compare. The building surfaces are made water-resistant and sometimes waterproof. com. Bastion Bastion 5L Waterbased. 1-2012 Waterproofing membrane systems for exterior use – above ground level Part 1: Materials (18 pages). From concrete to waterproofing to tile adhesive – you can rely on Bastion for great value building materials and supplies. bonds to most construction materials including asphalt. Listed below are the advantages of using CIM 1000’ s fluid-applied membrane system beneath a thin set and tile assembly: high solids, low odor and VOC compliant. Crommelin Blackseal Heavy Duty Waterproofing is a commercial grade, water based bitumen emulsion modified with a synthetic rubber co-polymer to provide excellent waterproofing properties and good flexibility. Weighing the Cost vs. Bastion Rapid Set is a water based, fast curing, fibre reinforced SBR latex membrane designed for waterproofing wet areas, showers, laundries, roofs, terraces, balconies,. Our products are available nationwide through an extensive network of distributors and specialty building supply houses. 3mm BRAI ASPHALT MEMBRANE (Torch Applied Bituminous APP waterproofing) ₱3,360. 00 for a 10x 50-foot roll or about 500 square feet. Buy SPEEDHIDE 5 gal. The aim of the completed standards is to produce a consistent and reliable approach to the materials used in the design and installation of external. Non-toxic. The most widely used application area for BarrierPro® is in single-component liquid systems applied with the builder’s preference of brush, roller, trowel, and even spray. Our exterior foundation waterproofing membrane is UV resistant, waterproof, and non-biodegradable. Bastion Exterior UV Stable WPU Membrane. Waterproofing is the process of making an object or structure waterproof or water-resistant so that it remains relatively unaffected by water or resisting the ingress of water under specified conditions. When waterproofing basement walls with it, brush or roll the paint on thickly enough to fill all the little surface holes, then allow it to dry fully before applying a second coat. Liquid Rubber Waterproof Sealant is an environmentally friendly coating that is easily brushed on and cures into a waterproof membrane. 2. This Exterior Grade Brushable Waterproofer is a synthetic rubber waterproofing membrane for use in areas of high expected movement, ponding or permanent immersion. 95 + GST. Duradek completely seals the deck substructure ensuring water never reaches the building envelope and completely protects everything below. This damage can lead to significant financial loss as well as safety issues if the foundations are not adequately waterproofed and protected. Add to Cart. The materials are used in a system to prevent the ingress of water into foundations, roofs, walls, basements, buildings, and. That said, in the long-term, there is a clear case for using more long-lived, better-quality. com. Waterproofing Full Instructions - Waterproofing Priming Checklist - Waterproofing Membrane Installation Checklist - Waterproofing Substrate Preparation Checklist - Waterproofing Sealing Full Instructions…Crommelin ONE COAT Rapid Under-tile Waterproofing Membrane is a premium; heavy-duty liquid applied waterproofing membrane, formulated to permanently waterproof wet areas prior to tiling. Pre-cut reinforcing fabric prior to installing in corners and around drainage outlets. Crommelin is endorsed to ISO 9001, reinforcing our commitment to product quality, reliability and consistency. Home Waterproofing & Roofing Membranes Preparatory Products & Primers. Add to Cart. Paint can be used in areas where a membrane is not required, making this the smart choice. Remove blockages, and fix any holes. A low-odor masonry waterproofing paint specially formulated to waterproof any interior, exterior, above or below grade masonry surface. 1. Mix a powdered thinset mortar with water for use over waterproof membrane. The exterior basement waterproofing membrane is made in the USA from 100% High-density polyethylene (HDPE). Exterior Basement Waterproofing Options: Cost: Foundation Membrane: $8,000-$15,000:. 2 cm (0. au Page 2 of 4 SUITABLE SUBSTRATES Exterior Grade Waterproofing is suitable for use on the following surfaces: Estimated Order Delivery Date: Nov 22 - Nov 24. Waterproofing Membranes: The Ultimate Guide. Economical general purpose water based primer for use on porous substrates to be top coated with water based waterproofing membranes such as Durabit ef, durabit. Bituthene membrane is ideal for. However, they vary on other factors such as changes in weather, usage and so on. 00. Please click on one of our Product Categories below for more information on the brands you know and trust. Model # BE185169 Store SKU # 1000162969. 70 per square foot at. The most common type is a synthetic coating that is applied over an existing. They can be adhered to or installed around the foundations (like a structural slab) to prevent water penetration. it can be used on. CIM’s “ Waterproofing Under Tile ” guide offers an outline for keeping surfaces dry and impermeable. I. • One coat application. Emer-Proof Quick Dry Part B 12. Ensure downspouts empty at least five feet away from the foundation, installing downspout extensions if necessary. Compatible with Davco. Suitable as an anti fracture membrane. UV Stable. 52935. Install a waterproofing membrane. ARDEX DRS 10 GC. 1 Crommelin Under-tile Exterior Waterproofing Membranes are for use on decks and balconies where an impervious waterproof membrane is required to prevent damage to building elements and adjoining areas. Shop our range of Waterproofing Membranes at warehouse prices from quality brands. DiamondCoat Tintable Sealer and Tint will re-colour and rejuvenate old, discoloured and stained areas of concrete and paving. Crommelin 4L Liquid Reinforcing Fabric (0)Two specific requirements are encountered in most waterproofing applications: To join two materials, forming a bond with the membrane, or; Allow the membrane to release from junctions where. There a number of different types of these materials, and this bulletin concerns the use of fibreglass matting vs Deckweb. • Roll is 7-1/4-in wide. 67826. 2. Sika 4L Red SikaTite Undertile Rapid Waterproofing Membrane (0) $123. Remains unaffected by ground settlement beneath slabs. Bituminous membrane and polyurethane can withstand up to 10 years. There are a few different types of waterproofing membranes that can be used. For most applications, apply a 6 mil coat of HYDRO BAN Quick Cure liquid with brush or roller over substrate including pre-treated areas. 1 Litre, 4 Litre and 15 Litre. By adhering smoothly to surfaces, it restores the features of such surfaces. Identify potential water sources 2. When completely. Emer-Proof Vapour Control Part A. BEST POLYURETHANE: Seal-Once Nano + Poly Concrete and Masonry Sealer. Let dry 15 to 20 minutes at 70°F (21°C) and 50% RH. This price includes the. 1300 788 780. vapour barrier against permanent wet conditions. It is designed to use on concrete, block, bricks, wood and metal. 5000 for more on vapor barrier vs. Waterproofing Membranes. Fortunately, Remedial Membranes can help you with that problem. NX Seal® is an economical, self-adhering 40 mil waterproofing membrane for use under siding, stucco, exterior plaster and as a through-wall flashing. The most common type of sheet based membrane is a bituminous waterproofing membrane. I'm really happy with the outcome - it's exactly what I envisaged and it's only cost me a. What are a few brands that you carry in Waterproofing membrane Underlayment? We carry Schluter, Goof Proof Shower, DURAL and more. Traffic Bearing Membrane. UV Stable. 5m2 @ 1. Dunlop Shower Waterproofing Kit A complete wet area waterproofing kit, easy-to-use system that enables the complete waterproofing installation in new showers, laundries and kitchens. Before applying your waterproofing coating under tile, study your local climate to see how much protection you need. 1L. Flat Roofs, Metal Roofs, Sloped Roofs, Planter Boxes, Foundations, Sheds, Basements, Metal, Wood, Concrete and more. Visit your local store for the widest range of products. Flexible and elastomeric, Under Tile Membrane dries to form a durable water and vapour barrier against permanent wet conditions. Tile over membrane within 72 hours in exterior applications to avoid extended exposure to ultraviolet rays. Lucy, Dens-shield, unlike cement-based backer-boards, is designed as a waterproof substrate. PPG1145-4 Blue Willow Satin Exterior Paint PPG1145;Embed the membrane into the mortar fabric side down with enough pressure to ensure proper bedding. Crommelin Water Based Bitumen Paint is a heavy duty effective and economical solution for waterproofing. performance. Product Data Sheet (PDS) Torch-applied, plastomeric distilled polymer-bitumen waterproofing membrane, made of distilled bitumen and plastomers. Membrane product compatibility comes down to whether the system is fi t for purpose, and whether all products are suitable for use as a complete and holistic system. — CONSTRUCTION WATERPROOFING HANDBOOK WATER UNDER PRESSURE. 50. Backed by. 42. The dimples in the membrane are 5/16” in height and prevent the backfill material from touching the wall. Scrape it off with a wire brush or dissolve it with a solution like muriatic acid. A professional plumber will charge about $500 – $800 if no digging is involved. Cover the completed membrane with manufacturer approved protection board adhered to the membrane. Compare. Whether you are sealing a driveway, footpath, patio, garage floor, workshop, warehouse, shop or water feature, Crommelin has. Embed the membrane into the mortar fabric side down with enough pressure to ensure proper bedding. Suitable for exterior & Interior applications. Novia’s Back Roof Breathable Membrane is a lightweight, high performance breather membrane suitable for use as a breathable roof underlay. These standards are currently being drafted. Sika 4L BlackSeal Plus Bitumen Waterproofing Membrane (4) $62. The definition of a bond breaker according to AS 3740 is: “A system that prevents the membrane bonding to the substrate, bedding or lining. Packaging: 1L, 4L, 15L Shower Waterproofing Membrane Kit • Includes everything you need to waterproof you wet area • 4L kit suitable for a single shower recess • 6L kit suitable for a double shower recess • Detailed application instructions included Coverage: 2m2 per litre, 2 coats Recoat/Cure time: 2-4 Hours / 7 Days Packaging: 4L, 6LTixoplast is a bitumen based sealant which cures into a plastic, black seal. Davco K10 Plus is a premium performance, flexible, premixed, Class III, water based polyurethane waterproofing membrane designed for the use under tile, stone and other resilient finishes. System for waterproofing and overlaying old flooring with ceramic tiles in shower cubicles, bathrooms and changing rooms. Class 3 membrane. Conduct a thorough inspection of the exterior and interior of the basement to pinpoint any possible sources of water infiltration and identify cracks. The $3 to $10 per square foot price range includes installation by experienced waterproofing contractors,. SikaBit® self-adhered bituminous modified sheet membranes, provide a cost-efficient solution for basements and below-grade structures. – Australian Standard 4654. Cut the membranes to the appropriate lengths when reaching a wall or another object, and leave approximately ¼’’ of space between the membrane’s edge and the wall or object. Find Bastion 4L Exterior Waterproof Membrane at Bunnings. Location. Here’s how to execute your exterior waterproofing project: Check gutters and downspouts to ensure they’re unclogged and in good condition. Email. 00:00. Tips. 1. 'An effective method to waterproof a basement involves exterior measures,' says Hashi Mohamed. damp proof membrane for external walls. Packaging: 1L, 4L, 15L Shower Waterproofing Membrane Kit • Includes everything you need to waterproof you wet area • 4L kit suitable for a single shower recess • 6L kit suitable for a double shower recess • Detailed application instructions included Coverage: 2m2 per litre, 2 coats Recoat/Cure time: 2-4 Hours / 7 Days Packaging: 4L, 6L Tixoplast: a bitumen based sealant. Delta external waterproofing products for basements and cellars, including GeoDrain Quattro exterior membrane. Dunlop Waterproofing Reinforcing Mat is an integral part of the Dunlop waterproofing system. Waterproof membrane failure is a difficult issue. Exterior membrane. Purchase Bastion 4L Under Tile Membrane. Crommelin 4L One Coat Rapid Under-Tile Waterproofing Membrane (0) $84. SKU MM-HDPE-18-30-100. 3 days water Waterproof Membrane for Floors 1. membrane using Total DFT bondbreaker tape ensuring at Coverage least 12mm either side of Walls the crack and covering the 0. 2. Multithane UVR is a cross linked, moisture curing, single pack, self-leveling capable, liquid applied polyurethane waterproof membrane which cures to form a tough, seamless, durable, and elastomeric (class III) waterproofing membrane, incorporates UV stabilisers and UV absorbers to enable the product to provide greater UV protection and stability than conventional aromatic. When used in conjunction with Crommelin liquid applied waterproofing membranes the combined system will meet… Crommelin Reinforcing Fabric with Bond Breaker is a 100mm wide self-adhesive non-woven polyester fabric, incorporating a self-adhesive portion (central 1/3 of tape) that acts as a bond-breaker over joints, cracks or other areas of. For concrete or treated wood foundations only: Apply a bead of a maximum diameter of 1. Use prior to installing mortar beds, render or tiling. 5 ltr joint. Instead of sealer, it is also possible to lay a waterproof membrane over the cement. Installation by ONLY trained and authorized applicators. CIM’s “ Waterproofing Under Tile ” guide offers an outline for keeping surfaces dry and impermeable. These are considered preventative. It is a preformed elastomeric waterproofing membrane made of high-quality EPDM rubber. View Product Specifications. Fortunately, Remedial Membranes can help you with that problem. Sheet Membrane Waterproofing On average, sheet membranes cost slightly more than liquid. 2—2009 Waterproofing membrane systems for exterior use—Above ground level, Part 2: Design and installation. Crommelin Waterproofing Membrane Surface Primer is suitable for use on concrete and cementitious substrates to consolidate the surface and provide an excellent surface for membrane application. Dulux Avista 10L Charcoal Coloured Concrete Sealer (1) $159. You can use 650 LT Liquid Adhesive on applications down to 25° F (-4° C). Signup for our newsletter to get notified about sales and new products. Fast Cure. 75 Gallons of Tar Pitch like Henry. EPDM Membrane. Dimensions. 50 per square foot, materials and labor included. 00 £ 502. Sika 4L BlackSeal Plus Bitumen Waterproofing Membrane (4) $62. One sealing coat of diluted Bondall BondCrete (BondCrete 1:Water 4) will provide an excellent sealer or key when applied to new or old cement rendered walls, plaster, etc. Excellent curing time, UV stable. Crommelin High UV Resistant Roof & Wall Waterproofing is tough, durable and suitable for pedestrian traffic. When applying the waterproofing membrane sheets, an overlap joint with a minimum width of 30–50 mm is made. Prefabricated Drainage Composite. how to use chemical guys scratch and swirl remover; flywoo. If you require further information on External Structural Waterproofing please contact one of our technical advisors on 0117 982 3282. of tapes have been applied! 3. 4. Regular. Floor Patching and Concrete repair: 4. 5 entire length and width of the mm) 7. Pond Sealer Colours are tough and flexible and will remain watertight under permanently wet conditions. Ready to use straight from the pail. Fibre Reinforced membrane. Contents [ hide] 1 Tiling over a waterproofing membrane, some helpful tips: 2 Decoupling mat floor tiling, some helpful tips: 2. Tiledek™ tile underlayment waterproof membrane provides: A unique waterproofing solution made specifically for exterior tile deck projects. Plus our all-embracing range of high performing Waterproofing Membranes. Brand: Gripset Betta. Crommelin 4L One Coat Rapid Under-Tile Waterproofing Membrane (0) $84. The selection of suitable gloves does not only depend on the material, but also on further marks of quality which vary from manufacturer to. 50 inc GST Add to cart. Crommelin 100ml White Sprayable Exterior Grade Waterproofing (0) $14. Liquid-applied waterproofing membranes are designed to give you the best possible moisture protection. A high-quality powdered mortar will bond extremely well to your waterproofing membrane, resulting in a long-lasting tile installation. Go to store Watch price Add to list. Suitable Surfaces & Substrates. Description Mapeguard WP 200 is a thin, flexible polyethylene sheet membrane with a nonwoven, polypropylene fabric on both sides, for both waterproofing and crack isolation in interior/exterior residential and commercial applications. Pre-mixed thinset mortar bonds poorly to waterproof membrane and will cause tiles to pop up or fall off the walls. stepper motor driver controller. 4. Features Snapshot. Bastion 15kg Under Tile Waterproofing Membrane (4) $99. R-value is used in the United States. 56. Before you do, patch cracks with hydraulic cement and remove efflorescence. Pastikan untuk mengecek kerapatan lembaran waterproofing membrane dengan dengan membakarnya secara merata. Emer-Proof Quick Dry Part A 12. Poor workmanship, including incorrect installation methodology, can lead to leakage issues due to waterproofing failure. Horizontal Waterproofing: 4. Shower Waterproofing Membrane delivers a keyed finish, suitable for use with cement based tile adhesives and is designed for application in showers, laundries, kitchens, bathrooms, wet rooms and balconies. Ask me anything about Econodek! If you wish to speak with a human you can call us 8am-4pm PST toll free 1-877-860-9333. Here are some products I’ve found: 1) Poly-wall Home Stretch Liquid Waterproofing (about $358 for 5 gallon). Waterproofing original basement walls from the outside involve: Installing an underground trench drain. Exterior wall waterproofing is done to prevent these problems. Exterior basement waterproofing with dimpled membrane. 🕑 Reading time: 1 minute Waterproofing is the formation of an impervious barrier over surfaces of foundations, roofs, walls, and other structural members. It involves installing a French drain along the perimeter and a sump pump system. If moisture appears on the underside of the sheet the area is too damp. It can be mixed with sand and cement to make screeds and mortars. This test measures the membrane’s ability to elongate and recover over repeated cycles, simulating conditions you would expect the membrane to undergo during its service life. Water-based membrane resists. The details are available in their online installation guide. Conduct a thorough inspection of the exterior and interior of the basement to pinpoint any possible sources of water infiltration and identify cracks. Cold applied - requires no heat or flame. Up to $15,000. It is typically applied to the exterior of a building. Visit your local store for the widest range of products. e: Shower, bathtub surround) No wait time between steps ; Easy-to-install ; Material: 8 mill polyethylene ; Fully waterproof and vapour-tight ; Prevents mould growth ; Eliminates need for cement backerboard ;. Bastion is a Australasian based company committed to providing the ultimate solutions in barrier protection throughout Australia and New Zealand. No reviews yet. Apply to a dry surface. 99 Inc Vat. Crommelin Shower Waterproofing Kit and Shower Waterproofing Membrane are permanent solutions to waterproof a shower and seal wet areas and balconies prior to tiling. Air vapor barriers come in two forms with various applications: fluid and sheet-applied air barriers. Tough & Durable. Sika 20L BlackSeal Plus Bitumen Waterproofing Membrane (1) $222. ONE COAT Rapid. Prime the wet area with a suitable primer for the membrane that is to be used (see data sheet). A flexible self-adhering rubberized asphalt sheet waterproofing membrane is well suited for below-grade waterproofing ICF forms. DRYLOK Original White Flat Solid Latex Waterproofer (5-Gallon). Reinforcing Fabric maximises membrane strength in vulnerable areas such as corners and construction joints and doesn't compromise the flexibility of the waterproofing system. The function of the impermeable barrier is to prevent water penetrations. Step 3: Joint detailing and bond breaking. No matter what the waterproofing need is, MAPEI has the system solution. Ensuring that the membrane that you are using complies with the regulatory requirements as outlined within the NCC (National Construction Code) is critically important. Premixed, ready to use. Courtesy of Cosella-Dörken Products, Inc. Ensure the entirety of the room has a smooth, even layer of primer. Find Bastion 4L Exterior Waterproof Membrane at Bunnings. BEM: One-Component Building Envelope Membrane. Interior waterproofing will help, but more severe issues are usually on the house’s exterior. Compare. A low-odor masonry waterproofing paint specially formulated to waterproof any interior, exterior, above or below grade masonry surface. Best Selling waterproofing membrane Products. From sub-floor to roofing, ARDEX have a range of rapid curing, energy efficient membranes to stand the test of time – and moisture. Homeowners spend an average of $5,000 to. Waterproofing & Sealing. Resistant to many chemicals, our sheet membrane systems ensure high protection to the concrete, against aggressive gases or even groundwater with seawater. Buy primer sealer undercoat at Mitre 10. To purchase. Most homeowners pay an average of $4,500 to $4,600 to waterproof their basements.