{"product_id":"mapei-keracaulk-s-acrylic-caulk","title":"Mapei Keracaulk S Acrylic Caulk","description":"\u003cstyle\u003e\na {\n    text-decoration: none;\n    color: #464feb;\n}\ntr th, tr td {\n    border: 1px solid #e6e6e6;\n}\ntr th {\n    background-color: #f5f5f5;\n}\n\u003c\/style\u003e\n\u003cdiv\u003e\u003cstrong\u003eMapei Keracaulk S Premium Sanded Siliconized Acrylic Caulk\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eKeracaulk S is a premium-grade, sanded, siliconized acrylic caulk formulated to match all of Mapei's sanded grout colors — an easy, seamless finish where grout lines meet movement joints. Easy to apply and easy to clean.\u003c\/p\u003e\n\u003cp\u003eJoints where flooring meets a wall, countertop meets a wall, tub meets a wall, or shower corners are all considered movement joints. Standard grout can't flex with that movement and will eventually crack — that's what caulk like Keracaulk S is for. For gaps up to 1\/4\", use as a flexible barrier and filler between horizontal and vertical surfaces, or where tile abuts a dissimilar surface, including around sinks, tubs, showers, countertops, and ceramic tile floors.\u003c\/p\u003e\n\u003cp\u003eIncludes BioBlock technology, tested to ASTM G21 standards, so it doesn't support mold, mildew, or fungal growth after install (regular cleaning and maintenance still required). Paintable after full cure. Meets or exceeds ASTM C834 for low-movement sealants. Water cleanup while fresh.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1996\/7489\/files\/keracaulk-s-_u.pdf?v=1786646809\" target=\"_blank\" rel=\"noopener\"\u003eClick here for Technical Data Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePremium-grade, sanded, siliconized acrylic caulk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse\u003c\/td\u003e\n\u003ctd\u003eMovement joints — floor-to-wall, countertop-to-wall, tub-to-wall, shower corners\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax gap size\u003c\/td\u003e\n\u003ctd\u003e1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor matching\u003c\/td\u003e\n\u003ctd\u003eFormulated to match all Mapei sanded grout colors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTechnology\u003c\/td\u003e\n\u003ctd\u003eBioBlock (ASTM G21 tested — resists mold\/mildew\/fungi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eMeets\/exceeds ASTM C834\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePaintable\u003c\/td\u003e\n\u003ctd\u003eYes, after full cure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCleanup\u003c\/td\u003e\n\u003ctd\u003eWater, while fresh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterior\/exterior\u003c\/td\u003e\n\u003ctd\u003eInterior use only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstall temp\u003c\/td\u003e\n\u003ctd\u003e50°F–90°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage size\u003c\/td\u003e\n\u003ctd\u003e10.5 oz gun-grade tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy can't I just use grout in these joints?\u003c\/strong\u003e Movement joints — where a floor meets a wall, a countertop meets a wall, or in shower corners — need to flex. Standard grout is rigid and will eventually crack there. Caulk like Keracaulk S is built to move with the joint instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the caulk match my grout exactly? \u003c\/strong\u003eIt's formulated to match Mapei's sanded grout colors, but slight variation between grout and caulk shade is normal due to differences in material and texture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the largest gap this can fill? \u003c\/strong\u003eUp to 1\/4\" (6mm).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I paint over it? \u003c\/strong\u003eYes — it's paintable once fully cured.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e \u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan id=\"product-sku-search\" class=\"product-sku-search\"\u003eSku: \u003cspan\u003e4JA500133\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c!-- END FLOORCOMMANDER SKU INSERT --\u003e\n\u003cstyle\u003e\na {\n    text-decoration: none;\n    color: #464feb;\n}\ntr th, tr td {\n    border: 1px solid #e6e6e6;\n}\ntr th {\n    background-color: #f5f5f5;\n}\n\u003c\/style\u003e","brand":"Mapei","offers":[{"title":"Alabaster","offer_id":48612917051586,"sku":"4JA500133","price":10.29,"currency_code":"USD","in_stock":true},{"title":"Armor","offer_id":48612917084354,"sku":"4JA523033","price":10.29,"currency_code":"USD","in_stock":true},{"title":"Avalanche","offer_id":48612917117122,"sku":"4JA503833","price":10.29,"currency_code":"USD","in_stock":true},{"title":"Bahama 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