{"product_id":"watco-wallseal","title":"Watco Wallseal","description":"\u003cp\u003eWatco Wallseal is a clear, penetrating wall sealer for dusty brickwork, blockwork, concrete and other suitable porous surfaces. Its water based acrylic formulation binds loose surface dust and helps protect the substrate while retaining the character of exposed masonry.\u003c\/p\u003e\n\u003cp\u003eIt is useful on gritty warehouse walls, concrete columns, render and plaster where ongoing dusting makes the space difficult to keep clean. One coat generally binds and dustproofs the surface. A second coat can build a low-sheen, wipe-clean finish, with the final appearance depending on absorption and the number of coats. Wallseal causes only minimal darkening on many surfaces, but a trial patch is worthwhile on decorative masonry.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eClear dustproofer for porous walls and masonry.\u003c\/li\u003e\n\u003cli\u003eWater based, single pack formulation.\u003c\/li\u003e\n\u003cli\u003eBrush or roller application without a separate primer.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSurface Preparation\u003c\/h3\u003e\u003cp\u003eBrush away loose dust and friable material. The substrate must be sound enough for treatment and porous so the liquid can penetrate. Remove oil or grease with a suitable cleaner such as Watco Bio-D, rinse away residues and allow the wall to dry. Avoid soaking very absorbent surfaces during cleaning.\u003c\/p\u003e\u003ch3\u003eTechnical Data\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003ctd\u003e25L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition\u003c\/th\u003e\n\u003ctd\u003eSingle pack, water based acrylic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eClear; sheen increases with further coats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUse\u003c\/th\u003e\n\u003ctd\u003eInterior and exterior\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum conditions\u003c\/th\u003e\n\u003ctd\u003eAir 15°C; wall 10°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShelf life\u003c\/th\u003e\n\u003ctd\u003e24 months unopened\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eCoverage\u003c\/h3\u003e\u003cp\u003eApproximately 40–50m² per 5L, or 200–250m² per 25L per coat, depending on absorption. Allow a conservative 8m²\/L for planning. Particularly porous or textured walls can use more, especially where further coats are needed for a sealed finish.\u003c\/p\u003e\u003ch3\u003eDirections for Use\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003ePrepare the surface and follow the container instructions; the technical sheet advises shaking the container before use.\u003c\/li\u003e\n\u003cli\u003ePour some material into a suitable tray and apply generously with a brush or roller.\u003c\/li\u003e\n\u003cli\u003eWork the liquid into the porous surface, controlling runs and allowing the wall to absorb the treatment. A brush can be easier on rough or uneven masonry.\u003c\/li\u003e\n\u003cli\u003eWhere another coat is required, allow around six hours at 20°C or eight hours at 10°C. Full drying is approximately twenty-four hours under the stated conditions.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eLimitations\u003c\/h3\u003e\u003cp\u003eDo not apply to painted or sealed surfaces: the product relies on penetration. Do not use on a wet wall; only slight residual damp after cleaning is acceptable. Additional coats can change the sheen and appearance, so test where that matters. A dustproofer does not replace repairing a structurally unsound wall or resolving water ingress. Do not steam clean the finish. Condition material at 15–25°C before use and protect from frost.\u003c\/p\u003e\u003ch3\u003eProduct FAQs\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eCan I keep the exposed-brick appearance?\u003c\/strong\u003e\u003cbr\u003eWallseal dries clear with minimal darkening on many substrates. Test a small area first because absorption affects the appearance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many coats are needed?\u003c\/strong\u003e\u003cbr\u003eOne generally binds dust. A second or further coat may be needed for a more sealed, wipe-clean finish on porous surfaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan it be used over wall paint?\u003c\/strong\u003e\u003cbr\u003eNo. The technical sheet excludes painted and sealed surfaces because Wallseal must penetrate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much area does the container cover?\u003c\/strong\u003e\u003cbr\u003eApproximately 200–250m² per 25L per coat, with reduced coverage on very porous or textured walls.\u003c\/p\u003e\u003ch3\u003eData Sheets\u003c\/h3\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/9017\/6596\/files\/watco-coating-wallseal.pdf?v=1794406912\" target=\"_blank\" rel=\"noopener\"\u003eTechnical Data Sheet\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/9017\/6596\/files\/watco-coating-Wallseal__GB_EN__7_00__18_06_2026.pdf?v=1794406911\" target=\"_blank\" rel=\"noopener\"\u003eSafety Data Sheet (GB)\u003c\/a\u003e\u003c\/p\u003e","brand":"Watco","offers":[{"title":"25L","offer_id":58283636130132,"sku":"WS25","price":350.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/9017\/6596\/files\/watco-coating-10-wallseal.jpg?v=1794406933","url":"https:\/\/andrewscoatings.co.uk\/products\/watco-wallseal","provider":"Andrews Coatings Ltd","version":"1.0","type":"link"}