{"product_id":"red-devil-nb0841di-f-seal-duct-sealant-1-gallon-gray","title":"Red Devil NB0841DI F-seal Duct Sealant 1 Gallon Gray","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe RED DEVIL NB0841DI is a fiber-reinforced, water-based duct sealant formulated for pressure sealing HVAC duct systems in both indoor and outdoor applications. Sold in a 1-gallon pail, this gray sealant bonds to metal, fiberglass duct board, and flex duct, making it a versatile option for a wide range of residential and commercial ductwork installations. It delivers excellent adhesion and flexibility while maintaining a low VOC content. The formula is mold and mildew resistant and meets or exceeds all SMACNA pressure and sealing class requirements. Fast dry time helps reduce callbacks and keeps installations on schedule.\u003c\/p\u003e\n\u003cp\u003eThis sealant is appropriate for use on high, medium, and low-pressure HVAC duct systems. It is suited for metal ducts, flexible ducts, vents, air conditioners, and general HVAC appliances. HVAC technicians and sheet metal contractors apply it during new construction and retrofit ductwork projects where a durable, code-compliant seal is required. Indoor and outdoor rated, it holds up in unconditioned spaces such as attics, crawlspaces, and mechanical rooms where temperature and humidity fluctuate.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFiber-reinforced formula for durable, long-lasting duct seals\u003c\/li\u003e\n  \u003cli\u003eRated for high, medium, and low-pressure HVAC duct systems\u003c\/li\u003e\n  \u003cli\u003eExceeds all SMACNA pressure and sealing class standards\u003c\/li\u003e\n  \u003cli\u003eIndoor and outdoor rated for use in unconditioned and exposed spaces\u003c\/li\u003e\n  \u003cli\u003eMold and mildew resistant formulation\u003c\/li\u003e\n  \u003cli\u003eLow VOC, water-based formula with fast dry time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eCompatible with metal ducts, fiberglass duct board, flex duct, vents, air conditioners, and HVAC appliances. Listed to UL standards for applicable duct sealing applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eApplied by licensed HVAC technicians or sheet metal contractors using a brush, trowel, or caulk gun depending on joint configuration. Power down the air handling system before applying sealant to duct joints. Surfaces should be clean, dry, and free of oil or loose material before application. Follow local mechanical codes and SMACNA guidelines for joint preparation and sealant coverage requirements.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContainer Capacity\u003c\/strong\u003e: 1 Gallon\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContainer Type\u003c\/strong\u003e: Pail\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Gray\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFormula Type\u003c\/strong\u003e: Fiber-Reinforced Water-Based\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Metal and Flexible Ducts, Vents, Air Conditioners, HVAC Appliances\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplicable Standard\u003c\/strong\u003e: UL\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: RED DEVIL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: NB0841DI\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RED DEVIL","offers":[{"title":"Default Title","offer_id":51284064534834,"sku":"NB0841DI","price":22.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309276840.jpg?v=1781067585","url":"https:\/\/voomisupply.com\/products\/red-devil-nb0841di-f-seal-duct-sealant-1-gallon-gray","provider":"Voomi Supply","version":"1.0","type":"link"}