{"product_id":"watco-4-hour-epoxy-primer","title":"Watco 4 Hour Epoxy Primer","description":"\u003cp\u003e\u003cstrong\u003eWatco 4 Hour Epoxy Primer\u003c\/strong\u003e prepares porous concrete floors for an epoxy coating. Its penetrating, two-part formulation reduces suction, binds friable surfaces and helps prevent air bubbles in the finish. Supplied with resin and curing agent, it allows priming and coating within the same working day.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFast-curing epoxy primer for internal floors.\u003c\/li\u003e\n\u003cli\u003eVirtually solvent free, high-solids formulation.\u003c\/li\u003e\n\u003cli\u003eStrengthens weak surface material before painting.\u003c\/li\u003e\n\u003cli\u003eClear finish; may darken some substrates slightly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Data\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003ctd\u003e5L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSuitable substrates\u003c\/th\u003e\n\u003ctd\u003eBare porous concrete, sand and cement screeds, bricks and blockwork\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCoats\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum temperature\u003c\/th\u003e\n\u003ctd\u003eAir: 15°C; floor: 10°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePot life\u003c\/th\u003e\n\u003ctd\u003eUp to 20 minutes at 20°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConcrete moisture\u003c\/th\u003e\n\u003ctd\u003eBelow 75% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eCoverage\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSmooth concrete: approximately 20m² per 5L (4m²\/L).\u003c\/li\u003e\n\u003cli\u003eAcid-etched concrete: approximately 15m² per 5L.\u003c\/li\u003e\n\u003cli\u003eShot-blasted or open-textured concrete: approximately 12.5m² per 5L.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePorosity affects consumption. The calculator uses the smooth-concrete rate; allow more material for absorbent surfaces.\u003c\/p\u003e\n\u003ch3\u003eDirections for Use\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eRemove loose material, contamination and laitance. Clean and degrease as required, rinse and let the floor dry thoroughly. Allow new concrete to dry for approximately eight weeks.\u003c\/li\u003e\n\u003cli\u003eStir both components, combine the complete pack and mix to a uniform consistency. Immediately transfer to a tray or scuttle: mixed primer left in the tin can become dangerously hot.\u003c\/li\u003e\n\u003cli\u003eWork one coat into the surface with a medium-pile roller; use a brush at edges. Provide good ventilation.\u003c\/li\u003e\n\u003cli\u003eOvercoat when touch dry, generally after 4–8 hours, and within 48 hours. Lightly abrade if the interval is exceeded.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eLimitations\u003c\/h3\u003e\u003cp\u003eFor indoor, porous substrates only. Apply to a dry surface, following the technical sheet. Store at 15–25°C for at least eight hours before use and protect from frost. Unopened shelf life: 24 months. Read both safety sheets before handling.\u003c\/p\u003e\n\u003ch3\u003eProduct FAQs\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat surfaces can I prime?\u003c\/strong\u003e\u003cbr\u003eUse on bare, porous concrete, sand and cement screeds, bricks and blockwork indoors. It is unsuitable for non-porous surfaces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much will a 5L pack cover?\u003c\/strong\u003e\u003cbr\u003eAllow approximately 20m² on smooth concrete, 15m² on acid-etched concrete or 12.5m² on shot-blasted\/open-textured concrete. Actual coverage depends on porosity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen can I apply the floor coating?\u003c\/strong\u003e\u003cbr\u003eThe product is designed for same-day priming and coating. Follow the technical sheet: overcoat when touch dry, generally 4–8 hours, and within 48 hours. Lightly abrade if this window is exceeded.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I apply it to damp concrete?\u003c\/strong\u003e\u003cbr\u003eFollow the technical sheet and apply to a dry surface. Concrete moisture must be below 75% RH. The primer relies on penetration into the substrate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long can I use the mixed primer?\u003c\/strong\u003e\u003cbr\u003eUse immediately after mixing and transfer into a paint tray or scuttle. Pot life is up to 20 minutes at 20°C. Do not leave mixed material in the mixing tin, where it can heat rapidly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperatures are needed?\u003c\/strong\u003e\u003cbr\u003eThe technical sheet specifies a minimum air temperature of 15°C and floor temperature of 10°C. Provide good ventilation.\u003c\/p\u003e\n\u003ch3\u003eData Sheets\u003c\/h3\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/9017\/6596\/files\/watco-4-hour-epoxy-primer-technical-data-sheet.pdf?v=1793708387\" target=\"_blank\" rel=\"noopener\"\u003eTechnical Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/9017\/6596\/files\/watco-4-hour-epoxy-primer-sds-curing-agent-gb.pdf?v=1793708387\" target=\"_blank\" rel=\"noopener\"\u003eSafety Data Sheet – Curing Agent (GB)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/9017\/6596\/files\/watco-4-hour-epoxy-primer-sds-resin-gb.pdf?v=1793708387\" target=\"_blank\" rel=\"noopener\"\u003eSafety Data Sheet – Resin (GB)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/9017\/6596\/files\/watco-4-hour-epoxy-primer-sds-curing-agent-gbni.pdf?v=1793708387\" target=\"_blank\" rel=\"noopener\"\u003eSafety Data Sheet – Curing Agent (GBNI)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/9017\/6596\/files\/watco-4-hour-epoxy-primer-sds-resin-gbni.pdf?v=1793708387\" target=\"_blank\" rel=\"noopener\"\u003eSafety Data Sheet – Resin (GBNI)\u003c\/a\u003e\u003c\/p\u003e","brand":"Watco","offers":[{"title":"5L","offer_id":58106520469844,"sku":"4EPS5","price":128.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/9017\/6596\/files\/watco-4-hour-epoxy-primer-5l.jpg?v=1793708354","url":"https:\/\/andrewscoatings.co.uk\/products\/watco-4-hour-epoxy-primer","provider":"Andrews Coatings Ltd","version":"1.0","type":"link"}