Dap’s Kwik Seal Ultra Premium Siliconized Kitchen & Bath Sealant is formulated to repel water, soap scum, stains, and mildew. In application, Kwik Seal Ultra Premium is ready for water exposure after just four hours without it washing out. The 100% waterproof and crack-proof material is safe for all surfaces—including granite and marble—and it is backed by a lifetime mold- and mildew-resistance guarantee. It’s available in 10.1-fluid-ounce cartridges for about $6, or in a 5.5-fluid-ounce squeeze tube for $5. dap.com