{"product_id":"gacoflex-her-polyurethane-roof-sealant","title":"GacoFlex H.E.R. Polyurethane Roof Sealant","description":"\u003cp\u003e\u003cstrong\u003eGacoFlex H.E.R.\u003c\/strong\u003e is a flashing grade, single-component, moisture-cure polyurethane roof sealant. It forms a tough, seamless elastomeric membrane with excellent adhesion to a wide variety of substrates.\u003c\/p\u003e\n\n\u003cp\u003eUse it to waterproof \u003cstrong\u003emetal roof seams and fasteners\u003c\/strong\u003e, flash around roof penetrations where movement causes cracking, and seal metal gutters. It also seals polyurethane foam, wood and concrete.\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;\"\u003eH.E.R. is a \u003cstrong\u003edetail sealant\u003c\/strong\u003e, not an area coating. It is applied at \u003cstrong\u003e60 mils\u003c\/strong\u003e in a stripe 76-102 mm wide around each penetration, and the data sheet rate is about \u003cstrong\u003e1.9 m² per 3.8 L\u003c\/strong\u003e at 60 mil. Additional material may be needed depending on substrate and weathering.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eWhy Contractors Choose H.E.R.:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Membrane:\u003c\/strong\u003e 400% elongation at 24°C, and it passes low-temperature flexibility at -51°C.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStrong Adhesion:\u003c\/strong\u003e Excellent adhesion to galvanized, galvalume and aged Kynar or similarly coated metals.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Solids:\u003c\/strong\u003e 80% solids.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish-Coatable:\u003c\/strong\u003e Can be finish coated with GacoFlex roof coating or another approved finish after the initial cure.\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\u003eMetal Roof Seams \u0026amp; Fasteners:\u003c\/strong\u003e Waterproofs seams and fasteners where roof movement causes cracking.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePenetrations:\u003c\/strong\u003e Roof penetrations, skylights, gutters and valleys.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMetal Gutters:\u003c\/strong\u003e Extensive use in sealing metal gutters.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOther Substrates:\u003c\/strong\u003e Seals polyurethane foam, wood and concrete.\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\u003eMetal:\u003c\/strong\u003e Remove rust and scale with a wire brush. Abrade slick pre-finished metal with a wire brush or sandpaper and wipe clean. The surface must be dry and free of frost or dew.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSingle-Ply \u0026amp; Smooth Surfaces:\u003c\/strong\u003e Clean with 9 parts clean water to 1 part GacoWash Concentrated Cleaner and allow to dry thoroughly.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReinforcement:\u003c\/strong\u003e Where gaps exist or roof movement is excessive, embed polyester fabric into the sealant.\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\u003eApplication Methods:\u003c\/strong\u003e Brush or roller (a coarse, short-bristle brush for flashing), or extrude through airless equipment capable of 2 gal per minute at 3,000 psi. Mix with a mechanical mixer and do not thin.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Rate:\u003c\/strong\u003e Brush 60 mils in a stripe 76-102 mm wide around each penetration. Two coats may be needed to reach 60 mils.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Windows:\u003c\/strong\u003e Best results when the sealant is at least 15.6°C and the surface is 4.4°C or higher and rising. Initial cure is 12-24 hours at 24°C and 45% RH, then inspect all seams.\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-her-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":"Pail (size TBC)","offer_id":59666339201372,"sku":"GACO-HER","price":223.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/7948\/0404\/files\/gacoflex-her-family-official.webp?v=1793141178","url":"https:\/\/www.mybuildonline.com\/products\/gacoflex-her-polyurethane-roof-sealant","provider":"My Build Online","version":"1.0","type":"link"}