{"product_id":"gacoflex-u91-urethane-base-coat","title":"GacoFlex U91 Urethane Base Coat","description":"\u003cp\u003e\u003cstrong\u003eGacoFlex U91\u003c\/strong\u003e is a single-component, moisture-cure aromatic urethane base coat with strong adhesion to numerous substrates. It produces a tough film that protects foam substrates and prevents oil migration on asphalt-based roofs.\u003c\/p\u003e\n\n\u003cp\u003eU91 is \u003cstrong\u003enot a finish coat\u003c\/strong\u003e. Top coat it with a GacoFlex aliphatic urethane, silicone or acrylic coating for weatherability, UV resistance and a high-reflectance cool roof. It is designed to rejuvenate and extend the life of aged asphaltic, single-ply and previously coated roofs.\u003c\/p\u003e\n\n\u003cdiv style=\"background-color: #fdf2f2; border-left: 5px solid #dc2626; padding: 15px; margin: 20px 0;\"\u003e\n  \u003cp style=\"margin: 0; font-weight: bold; color: #991b1b;\"\u003e⚠️ IMPORTANT COVERAGE NOTICE:\u003c\/p\u003e\n  \u003cp style=\"margin: 5px 0 0 0; color: #7f1d1d;\"\u003eAt \u003cstrong\u003e3.8 L per 9.3 m²\u003c\/strong\u003e U91 yields a 12 mil dry film, so one 18.9 L pail covers approximately \u003cstrong\u003e46 m²\u003c\/strong\u003e. The sample application rate is \u003cstrong\u003e4.7 L per 9.3 m²\u003c\/strong\u003e for a 20 mil wet film (about 37 m² per pail). Do not exceed \u003cstrong\u003e5.7 L per 9.3 m²\u003c\/strong\u003e in a single coat.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eWhy Contractors Choose U91:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOil Migration Resistance:\u003c\/strong\u003e Excellent resistance on asphaltic roofs without bleed-blocking primers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTough Protection:\u003c\/strong\u003e The tough cured film gives robust protection to foam roofs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStrong Adhesion:\u003c\/strong\u003e Exceptional adhesion to GacoPrime LVOC Primer, E5691 Water Reducible Epoxy Sealer\/Primer and E5320 2-Part Epoxy Primer\/Filler.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Solids:\u003c\/strong\u003e 80% solids by volume, with outstanding weatherability and chalking resistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Applications \u0026amp; Substrates:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAged Asphaltic Roofs:\u003c\/strong\u003e Rejuvenates aged asphaltic roofs and prevents oil migration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-Ply Membranes:\u003c\/strong\u003e Aged single-ply roofs, primed as described below.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFoam Roofs:\u003c\/strong\u003e Protects polyurethane foam with a tough film.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePreviously Coated Roofs:\u003c\/strong\u003e Extends the life of roofs that already carry a coating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"background-color: #f0fdf4; border-left: 5px solid #16a34a; padding: 15px; margin: 20px 0;\"\u003e\n  \u003cp style=\"margin: 0; font-weight: bold; color: #14532d;\"\u003e🛠️ SUBSTRATE \u0026amp; PRIMING SPECIFICATIONS:\u003c\/p\u003e\n  \u003cul style=\"margin: 5px 0 0 0; padding-left: 20px; color: #14532d;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSingle-Ply Membranes:\u003c\/strong\u003e \u003cem\u003eGacoPrime LVOC Primer\u003c\/em\u003e is required before applying U91.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMetal \u0026amp; Asphalt:\u003c\/strong\u003e Priming with \u003cem\u003eE5320 2-Part Epoxy Primer\/Filler\u003c\/em\u003e is recommended.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTop Coat Required:\u003c\/strong\u003e U91 is a base coat. Finish with a GacoFlex aliphatic urethane (such as U92), silicone or acrylic top coat.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eApplication Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMixing \u0026amp; Thinning:\u003c\/strong\u003e Mix thoroughly with an electric or compressed-air mixer. Thinning is typically required, using GacoFlex T5112 or T5120 thinner, but never more than 10% by volume.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Rate:\u003c\/strong\u003e Sample rate 4.7 L per 9.3 m² (20 mil wet film). Do not exceed 5.7 L per 9.3 m² per coat.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDry Time \u0026amp; Pot Life:\u003c\/strong\u003e Dry time is 10-12 hours at 24°C and 50% RH. Pot life is about 2 hours at 21-27°C, up to 3 hours with 10% thinner. Contains a toluene diisocyanate prepolymer, so see the Safety Data Sheet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- Professional PDF Download Section Start --\u003e\n\u003cdiv style=\"background-color: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 20px; margin-top: 30px; text-align: center;\"\u003e\n  \u003cp style=\"margin: 0 0 12px 0; font-weight: bold; font-size: 16px; color: #1e293b;\"\u003eTechnical Documentation \u0026amp; Specifications\u003c\/p\u003e\n  \u003cp style=\"margin: 0 0 20px 0; font-size: 14px; color: #64748b;\"\u003eDownload the manufacturer's product data sheet including coverage, substrate priming specifications and application instructions.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0250\/7948\/0404\/files\/gacoflex-u91-data-sheet.pdf\" target=\"_blank\" style=\"display: inline-block; background-color: #065f46; color: #ffffff; padding: 12px 24px; font-weight: bold; font-size: 14px; text-decoration: none; border-radius: 4px; transition: background-color 0.2s ease;\"\u003e\n    📄 Download Product Data Sheet (PDF)\n  \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c!-- Professional PDF Download Section End --\u003e","brand":"GacoFlex","offers":[{"title":"18.9 L pail","offer_id":59666339135836,"sku":"GACO-U91","price":507.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/7948\/0404\/files\/gacoflex-u9101-urethane-base-coat-pail.webp?v=1793141119","url":"https:\/\/www.mybuildonline.com\/products\/gacoflex-u91-urethane-base-coat","provider":"My Build Online","version":"1.0","type":"link"}