{"product_id":"dow-corning-99180621-rtv-silicone-joint-sealant-10-1-oz","title":"Dow Corning 99180621 Rtv Silicone Joint Sealant 10.1 Oz","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe DOW CORNING 99180621 is an RTV silicone joint sealant packaged in a 10.1 oz cartridge, part of the 739 series. It delivers a flexible, durable seal on a wide range of surfaces and is formulated for use in HVAC, plumbing, and general mechanical applications where temperature extremes and vibration are common factors. The sealant reaches a tack-free state in 75 minutes and achieves full cure in 24 to 72 hours. It maintains performance across an operating temperature range of -49 degrees F to 392 degrees F. Licensed trades and maintenance professionals use this product when sealing joints, penetrations, and connections that require long-term flexibility and adhesion.\u003c\/p\u003e\n\u003cp\u003eThis sealant is suited for residential and light commercial applications involving ceramic, glass, and metal substrates. Typical install scenarios include sealing around HVAC equipment housings, ductwork penetrations, pipe stubs, and mechanical enclosures where a heat-resistant, flexible seal is required. The white color makes it appropriate for visible joints where appearance matters. The single-use 10.1 oz cartridge format is compatible with standard caulking guns used by HVAC technicians, plumbers, and general maintenance contractors.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eRTV silicone formulation provides a flexible, long-lasting seal resistant to temperature cycling\u003c\/li\u003e\n  \u003cli\u003eOperating range of -49 degrees F to 392 degrees F suits demanding mechanical environments\u003c\/li\u003e\n  \u003cli\u003eTack-free in 75 minutes with full cure in 24 to 72 hours\u003c\/li\u003e\n  \u003cli\u003eAdheres to ceramic, glass, and metal surfaces without mechanical fasteners\u003c\/li\u003e\n  \u003cli\u003eUL 94 V-1 rated for flame resistance\u003c\/li\u003e\n  \u003cli\u003e10.1 oz cartridge fits standard caulking guns for fast, controlled application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use on ceramic, glass, and metal substrates in joint sealing applications. Part of the DOW CORNING 739 series, referenced by series part number 739-White.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis product is installed by HVAC technicians, plumbers, and mechanical contractors using a standard cartridge caulking gun. Surfaces should be clean, dry, and free of oil or loose material before application to ensure proper adhesion. Allow adequate cure time before exposing the joint to operating temperatures or fluid contact. Follow applicable building and mechanical codes governing sealant use in occupied spaces or plenum environments.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChemical Type\u003c\/strong\u003e: RTV Silicone\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 739\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: White\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContainer Size\u003c\/strong\u003e: 10.1 oz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContainer Type\u003c\/strong\u003e: Cartridge\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTack-Free Dry Time\u003c\/strong\u003e: 75 minutes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull Cure Time\u003c\/strong\u003e: 24 to 72 hours\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Operating Temperature\u003c\/strong\u003e: -49 degrees F (-45 degrees C)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Operating Temperature\u003c\/strong\u003e: 392 degrees F (200 degrees C)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdheres To\u003c\/strong\u003e: Ceramic, Glass, Metal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: UL 94 V-1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.88 pounds\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: DOW CORNING\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 99180621\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DOW CORNING","offers":[{"title":"Default Title","offer_id":51539246121266,"sku":"99180621","price":38.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/43465c4eac7c2f21b506d38397551dda.jpg?v=1785837032","url":"https:\/\/voomisupply.com\/products\/dow-corning-99180621-rtv-silicone-joint-sealant-10-1-oz","provider":"Voomi Supply","version":"1.0","type":"link"}