{"product_id":"stopgap™-sealant","title":"StopGap™ Sealant","description":"\u003ch2 dir=\"ltr\" style=\"text-align: center;\"\u003eStopGap™ Acoustical Sealant — 29 oz\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eThe cheapest part of a soundproofing build, and the one that decides whether the rest of it worked.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eA water-based, permanently flexible acoustical sealant for the perimeter of wall systems and around electrical cutouts. One 29 oz tube covers roughly 32 linear feet at a 3\/8\" bead. Sold singly or by the case of 12.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eWhat this fixes\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eSound leaks through gaps. You can build a wall with mass barrier, resilient clips, and double drywall, and then lose most of the benefit through an unsealed perimeter joint or an outlet cutout — because air paths carry sound almost perfectly.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eSealing those gaps is what turns a pile of soundproofing materials into an actual assembly. Applied per ASTM C-919 — two beads at the top, bottom, and all perimeter edges — StopGap contributes to achieving an STC of 53.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eWhere it goes\u003c\/h3\u003e\n\u003cdiv dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003eLocation\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eWhy\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWall perimeter — top, bottom, both edges\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe main event. Two continuous beads where drywall meets floor, ceiling, and adjacent walls.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAround electrical box cutouts\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOutlets and switches are direct holes through your wall assembly. Sealing them is how you hold your specified STC\/MTC values.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeams and penetrations\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAnywhere a pipe, wire, or duct passes through the assembly.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 dir=\"ltr\"\u003eWhy acoustical sealant, not regular caulk\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eStandard caulk cures hard and eventually cracks as the building moves — and a cracked seal is an open air path again. StopGap dries to a tough surface film but stays pliable underneath, and stays flexible up to five times longer than alternative brands.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eIt's also paintable, dries white, non-staining, has no residual run-off, and meets ASTM E-84 for flame retardancy.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eBefore you order\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eYou will need a larger caulking gun than the one in your garage.\u003c\/strong\u003e StopGap comes in a 29 oz tube, which does not fit a standard 10 oz gun. Pick up a 29 oz–capacity gun at any hardware store before install day.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eEstimate quantity from linear feet, not wall area — measure the full perimeter of every wall you're sealing, then double it, since the spec calls for two beads.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv dir=\"ltr\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003e\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube size\u003c\/td\u003e\n\u003ctd\u003e29 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoverage\u003c\/td\u003e\n\u003ctd\u003eApprox. 32 linear ft per tube at a 3\/8\" bead\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eWater-based, highly elastic acoustical sealant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTC contribution\u003c\/td\u003e\n\u003ctd\u003e53 when applied per ASTM C-919\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003ePaintable, dries white, non-staining\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlame retardancy\u003c\/td\u003e\n\u003ctd\u003eMeets ASTM E-84\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSold as\u003c\/td\u003e\n\u003ctd\u003eSingle tube or case of 12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 dir=\"ltr\"\u003eShipping\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eCalculated at checkout based on your address. This product does not qualify for free shipping.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003e⚠️ California residents: \u003ca href=\"#\"\u003eProp 65 Warning\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eBuilding a room-within-a-room? Email \u003ca href=\"mailto:contact@homecinemasupply.com\"\u003econtact@homecinemasupply.com\u003c\/a\u003e — we'll help you spec the whole assembly, not just the sealant.\u003c\/p\u003e\n","brand":"Home Cinema Supply","offers":[{"title":"Single (1)","offer_id":44090314784886,"sku":"SKU_1788130855792_995","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Case (12)","offer_id":44090314817654,"sku":"SKU_1788130855792_605","price":226.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/5721\/2534\/files\/57_source_1623684211.webp?v=1788130859","url":"https:\/\/www.homecinemasupply.com\/products\/stopgap%e2%84%a2-sealant","provider":"Home Cinema Supply","version":"1.0","type":"link"}