{"product_id":"composite-repair-epoxy-sikabiresin-cr72-perigee-direct","title":"Composite Repair Epoxy, SikaBiresin CR72 | Perigee Direct","description":"\u003cp\u003eSikaBiresin CR72 is a composite repair epoxy built for fabricating and repairing high-performance fiberglass and carbon fiber structures. This 100 percent solids resin is formulated for thorough fabric wetting and effective air release in both wet layup and resin-infusion processes, and it carries a UV-resistant formulation for parts that see sun exposure. Three CH72 hardeners give fabricators fast, medium, and slow working-time choices.\u003c\/p\u003e\n\n\u003ch2\u003eComposite Repair Epoxy Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e100 percent solids, two-component epoxy system\u003c\/li\u003e\n\u003cli\u003eUV-resistant general-purpose formulation\u003c\/li\u003e\n\u003cli\u003eSupports wet layup and resin infusion processes\u003c\/li\u003e\n\u003cli\u003eThree hardener speeds: CH72-1 fast, CH72-2 medium, CH72-3 slow\u003c\/li\u003e\n\u003cli\u003eMix ratio by weight: 100 resin to 18 hardener\u003c\/li\u003e\n\u003cli\u003eRoom-temperature cure with post-cure option\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePopular Uses\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMarine hull and structural repair, above and below the waterline\u003c\/li\u003e\n\u003cli\u003eComposite part fabrication and mold work\u003c\/li\u003e\n\u003cli\u003eHigh fiber-to-resin ratio laminates\u003c\/li\u003e\n\u003cli\u003eWet layup on fiberglass and carbon fiber\u003c\/li\u003e\n\u003cli\u003eResin infusion for larger or complex laminates\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eComposite Repair Epoxy Physical Properties\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMix ratio: 100 parts resin to 18 parts hardener by weight\u003c\/li\u003e\n\u003cli\u003eMixed viscosity: approximately 350 to 650 cps\u003c\/li\u003e\n\u003cli\u003ePot life: about 30 minutes (CH72-1 fast) up to 60 minutes (CH72-3 slow)\u003c\/li\u003e\n\u003cli\u003eFormulation: UV-resistant, 100 percent solids\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMix Ratio \u0026amp; Cure\u003c\/h2\u003e\n\u003cp\u003eCondition materials consistently and weigh components to the specified ratio before mixing to a uniform batch. For infusion, verify the bag seal and flow plan before opening the resin inlet. For wet layup, remove trapped air while maintaining the specified resin content, and match hardener speed to part scale and shop temperature.\u003c\/p\u003e\n\n\u003ch2\u003ePrecautions\u003c\/h2\u003e\n\u003cp\u003eFOR INDUSTRIAL USE ONLY. Refer to the SDS prior to use.\u003c\/p\u003e\n\n\u003cp\u003eQuestions on hardener speed or laminate scheduling? Call \u003ca href=\"tel:8173819398\"\u003e(817) 381-9398\u003c\/a\u003e or email \u003ca href=\"mailto:Sales@PerigeeDirect.com\"\u003eSales@PerigeeDirect.com\u003c\/a\u003e.\u003c\/p\u003e","brand":"Sika","offers":[{"title":"CR72 Resin (8.5 lb)","offer_id":48992039993598,"sku":"SIKABIRESIN_CR72_8.5LB","price":321.82,"currency_code":"USD","in_stock":true},{"title":"CH72-1 Hardener, Fast Cure (1.53 lb)","offer_id":48992040026366,"sku":"SIKABIRESIN_CH72-1_1.53LB","price":70.8,"currency_code":"USD","in_stock":true},{"title":"CH72-2 Hardener, Medium Cure (1.53 lb)","offer_id":48992040059134,"sku":"SIKABIRESIN_CH72-2_1.53LB","price":70.8,"currency_code":"USD","in_stock":true},{"title":"CH72-3 Hardener, Slow Cure (1.53 lb)","offer_id":48992040091902,"sku":"SIKABIRESIN_CH72-3_1.53LB","price":70.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1212\/5762\/files\/us-01-SikaBiresin-CR72-5-Gal-White-Pail-010797671-1.webp?v=1789752270","url":"https:\/\/www.perigeedirect.com\/products\/composite-repair-epoxy-sikabiresin-cr72-perigee-direct","provider":"Perigee Direct","version":"1.0","type":"link"}