{"product_id":"flexitec-primer-5kg","title":"Flexitec Primer 5kg","description":"\u003ch3\u003eSubstrate Primer for the Flexitec 2020 GRP Roofing System\u003c\/h3\u003e\n\u003cp\u003eFlexitec Primer is a rapid-curing, cold-applied primer used where required within the \u003ca href=\"\/collections\/flexitec\"\u003e\u003cstrong\u003eFlexitec 2020 GRP roofing system\u003c\/strong\u003e\u003c\/a\u003e. It prepares specific substrates and reinforces timber board joints, ensuring the system performs exactly as designed.\u003c\/p\u003e\n\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eEssential on porous mineral substrates\u003c\/li\u003e\n  \u003cli\u003eStripe priming only on timber board joints (OSB3 TG4)\u003c\/li\u003e\n  \u003cli\u003ePrevents resin loss into absorbent surfaces\u003c\/li\u003e\n  \u003cli\u003eRapid curing, typically 30–60 minutes\u003c\/li\u003e\n  \u003cli\u003eApplied cold by roller or brush\u003c\/li\u003e\n  \u003cli\u003eUsed with \u003ca href=\"\/products\/flexitec-powder-hardener-1kg\"\u003e\u003cstrong\u003eFlexitec powder hardener\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003cli\u003ePart of the approved Flexitec system build-up\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; line-height:1.2; position:relative; list-style:none;\"\u003e\n    What Flexitec Primer Is Used For\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%); font-size:18px; line-height:1;\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eFlexitec Primer isn’t a general purpose primer and it isn’t used everywhere — it’s applied only where the system requires it.\u003c\/p\u003e\n    \u003cp\u003eOn porous mineral surfaces, the primer regulates absorption and prepares the substrate so the Flexitec resin can cure and bond correctly.\u003c\/p\u003e\n    \u003cp\u003eOn timber decks (OSB3 TG4), the primer is not applied across the full surface. Instead, it is used specifically for reinforcing board joints, where movement and joint definition need to be controlled before the main system is installed.\u003c\/p\u003e\n    \u003cp\u003eUsed correctly, it forms an essential part of a compliant Flexitec installation. Used incorrectly or skipped where required, it can compromise performance.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; line-height:1.2; position:relative; list-style:none;\"\u003e\n    Where Flexitec Primer Is Required\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%); font-size:18px; line-height:1;\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003e\u003cstrong\u003ePrimer Essential\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eConcrete and screed\u003c\/li\u003e\n      \u003cli\u003eBrickwork\u003c\/li\u003e\n      \u003cli\u003ePorous cementitious substrates\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003cp\u003e\u003cstrong\u003ePrimer Recommended\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eBituminous felt\u003c\/li\u003e\n      \u003cli\u003eAsphalt\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003cp\u003e\u003cstrong\u003eTimber Decks\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eOSB3 TG4: primer used for priming board joints only\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003cp\u003e\u003cstrong\u003ePrimer Not Required\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eGRP substrates\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003cp\u003e\u003cstrong\u003eSpecial Substrates\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003ePVC single-ply membranes and existing liquid coatings: adhesion tests required to confirm suitability and primer selection\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; line-height:1.2; position:relative; list-style:none;\"\u003e\n    Application Overview\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%); font-size:18px; line-height:1;\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cul\u003e\n      \u003cli\u003eApplied by roller or brush\u003c\/li\u003e\n      \u003cli\u003eUsed with Flexitec powder hardener\u003c\/li\u003e\n      \u003cli\u003eHardener percentage varies with temperature\u003c\/li\u003e\n      \u003cli\u003eTypical cure time: 30–60 minutes\u003c\/li\u003e\n      \u003cli\u003ePrimer should be over-coated within 7 days\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eOn OSB3 TG4 decks, the primer is brushed firmly into the board joints, ensuring full penetration before reinforcement or coating takes place.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; line-height:1.2; position:relative; list-style:none;\"\u003e\n    Coverage Rates\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%); font-size:18px; line-height:1;\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eCoverage varies depending on surface texture and porosity:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e4–6 m² per litre\u003c\/li\u003e\n      \u003cli\u003e3.5–5.3 m² per kg\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eRough or highly absorbent surfaces will reduce coverage, so allowances should always be made when ordering.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom:12px; border:1px solid #333; border-radius:10px; background:#1a1a1a; overflow:hidden;\"\u003e\n  \u003csummary style=\"cursor:pointer; font-weight:700; padding:16px 48px 16px 16px; font-size:18px; line-height:1.2; position:relative; list-style:none;\"\u003e\n    A Roofer’s Perspective\n    \u003cspan style=\"position:absolute; right:16px; top:50%; transform:translateY(-50%); font-size:18px; line-height:1;\"\u003e▸\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cdiv style=\"padding:16px; border-top:1px solid #333;\"\u003e\n    \u003cp\u003eFlexitec Primer isn’t something you throw at every surface, but where the system calls for it, it’s essential.\u003c\/p\u003e\n    \u003cp\u003eUsed on mineral substrates, it prepares the surface properly. Used on timber decks, it does one job: reinforcing board joints where movement matters.\u003c\/p\u003e\n    \u003cp\u003eApply it where required, skip it where it isn’t — that’s how the Flexitec system delivers consistent, long-term results.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e","brand":"The Flat Roofing Shop","offers":[{"title":"Default Title","offer_id":56305126080843,"sku":"FT-Primer-5","price":114.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/4054\/9451\/files\/TFRSFLEXITECPRIMER5KGONWHITEBACKGROUND.jpg?v=1768735961","url":"https:\/\/theflatroofingshop.co.uk\/products\/flexitec-primer-5kg","provider":"The Flat Roofing Shop","version":"1.0","type":"link"}