{"product_id":"rhynalox-p40-production-paper-pk-50","title":"Rhynalox P40 Production Paper [Pk 50]","description":"\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:52ec0d0e-b276-46de-983d-fb2b0816962a-64\" data-testid=\"conversation-turn-12\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"a9d6478e-67c8-466c-a743-182b7f2f4bb9\" dir=\"auto\" data-message-model-slug=\"gpt-5-2\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cp data-start=\"325\" data-end=\"569\"\u003eP40 grit sandpaper is the recommended grade for preparing cured GRP laminate prior to topcoating. Its coarse abrasive quickly removes sharp glass fibres, trims down resin ridges and creates the mechanical key needed for strong topcoat adhesion.\u003c\/p\u003e\n\u003cp data-start=\"571\" data-end=\"703\"\u003eCorrect sanding at this stage is essential to achieving a smooth, professional GRP roof finish and preventing future coating issues.\u003c\/p\u003e\n\u003cp data-start=\"705\" data-end=\"750\"\u003e\u003cstrong data-start=\"705\" data-end=\"750\"\u003eWhy P40 grit is ideal for GRP preparation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"752\" data-end=\"1032\"\u003e• Quickly removes sharp glass fibre spikes after lamination\u003cbr data-start=\"811\" data-end=\"814\"\u003e• Flattens overlaps, resin build-up and high spots\u003cbr data-start=\"864\" data-end=\"867\"\u003e• Creates a strong mechanical key for topcoat adhesion\u003cbr data-start=\"921\" data-end=\"924\"\u003e• Helps prevent pinholes and capillary water ingress\u003cbr data-start=\"976\" data-end=\"979\"\u003e• Speeds up preparation of large and detailed areas\u003c\/p\u003e\n\u003cp data-start=\"1034\" data-end=\"1064\"\u003e\u003cstrong data-start=\"1034\" data-end=\"1064\"\u003eImportant sanding guidance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1066\" data-end=\"1274\"\u003eAlways ensure the laminate is \u003cstrong data-start=\"1096\" data-end=\"1111\"\u003efully cured\u003c\/strong\u003e before sanding.\u003cbr data-start=\"1127\" data-end=\"1130\"\u003eIf the laminate is still “green” in the curing cycle, the resin will soften and clog the sandpaper, making sanding difficult and less effective.\u003c\/p\u003e\n\u003cp data-start=\"1276\" data-end=\"1293\"\u003eOnce fully cured:\u003c\/p\u003e\n\u003col data-start=\"1295\" data-end=\"1424\"\u003e\n\u003cli data-start=\"1295\" data-end=\"1347\"\u003e\n\u003cp data-start=\"1298\" data-end=\"1347\"\u003eSand the entire laminate surface using P40 grit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1348\" data-end=\"1375\"\u003e\n\u003cp data-start=\"1351\" data-end=\"1375\"\u003eRemove dust thoroughly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1376\" data-end=\"1403\"\u003e\n\u003cp data-start=\"1379\" data-end=\"1403\"\u003eWipe down with acetone\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1404\" data-end=\"1424\"\u003e\n\u003cp data-start=\"1407\" data-end=\"1424\"\u003eApply GRP topcoat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"1426\" data-end=\"1533\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eUsing the correct grit at the correct stage is key to achieving a durable, long-lasting GRP roofing system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003eValue pack, huge saving compared to individual sheets.\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e","brand":"Fibreglass Roofing Kits","offers":[{"title":"Default Title","offer_id":39441664704675,"sku":"8613","price":37.11,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0525\/6160\/8867\/files\/IMGL0845.jpg?v=1772297353","url":"https:\/\/fibreglassroofkits.com\/products\/rhynalox-p40-production-paper-pk-50","provider":"Fibreglass Roof Kits","version":"1.0","type":"link"}