{"product_id":"shurtape-sf686-3spt-shurmastic-roll-mastic-tape-3in-x-100ft","title":"Shurtape sf686-3spt Shurmastic Roll Mastic Tape 3in X 100ft","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SHURTAPE sf686-3spt is a roll mastic tape designed for air-tight and moisture-free sealing in HVAC duct systems. Measuring 3 inches wide and 100 feet per roll, it works on Class 1 Flex Duct, sheet metal, PVC coated duct, and duct wrap vapor barriers. It is UL 181B-FX Listed, tested to UL 723 with a Flame Spread Index of 15 and Smoke Developed Index of 10, and meets SMACNA pressure classes 1\/2, 1, 2, 3, 4, and 6 across Seal Classes A, B, and C. Licensed HVAC technicians and sheet metal contractors rely on this tape for both indoor and outdoor duct sealing applications.\u003c\/p\u003e\n\u003cp\u003eThis tape is suited for residential and light commercial HVAC ductwork installations where code-compliant sealing is required. It applies to Class 1 flexible duct connections, sheet metal seams, and PVC coated duct assemblies. The product is also approved for subgrade application on PVC coated duct, making it useful in below-grade mechanical spaces and crawlspace installations where moisture exposure is a concern. It is a practical choice wherever a single tape must handle multiple duct substrate types on the same job.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eUL 181B-FX Listed for use on Class 1 Flex Duct\u003c\/li\u003e\n  \u003cli\u003eMeets SMACNA pressure classes 1\/2, 1, 2, 3, 4, and 6\u003c\/li\u003e\n  \u003cli\u003eSeal Class A, B, and C rated\u003c\/li\u003e\n  \u003cli\u003eFSI 15 and SDI 10 per UL 723 testing\u003c\/li\u003e\n  \u003cli\u003eApproved for subgrade application on PVC coated duct\u003c\/li\u003e\n  \u003cli\u003eSuitable for indoor and outdoor use on sheet metal, flex duct, PVC duct, and vapor barriers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with Class 1 Flex Duct, sheet metal ductwork, PVC coated duct, and duct wrap vapor barriers in HVAC air distribution systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tape is installed by licensed HVAC technicians and sheet metal workers during duct fabrication or repair. Shut down the air handling system and verify zero pressure in the duct before applying tape to seams or connections. Surface should be clean and dry for proper adhesion, particularly in subgrade or high-moisture environments. Work should comply with applicable mechanical codes including SMACNA duct construction standards and local jurisdiction requirements.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRoll Length\u003c\/strong\u003e: 100 feet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eListing\u003c\/strong\u003e: UL 181B-FX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSMACNA Pressure Classes\u003c\/strong\u003e: 1\/2, 1, 2, 3, 4, 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeal Classes\u003c\/strong\u003e: A, B, C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlame Spread Index (FSI)\u003c\/strong\u003e: 15\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmoke Developed Index (SDI)\u003c\/strong\u003e: 10\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Environment\u003c\/strong\u003e: Indoor and outdoor, including subgrade on PVC coated duct\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: SHURTAPE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: sf686-3spt\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SHURTAPE","offers":[{"title":"Default Title","offer_id":51383364124978,"sku":"SF686-3SPT","price":64.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312675055.webp?v=1782594591","url":"https:\/\/voomisupply.com\/products\/shurtape-sf686-3spt-shurmastic-roll-mastic-tape-3in-x-100ft","provider":"Voomi Supply","version":"1.0","type":"link"}