What Sticks To

Caulk and sealant

Which caulk for each place, how long it takes, and how much to buy.

Caulk finderPick where the caulk goes and whether you'll paint it, and see which caulks their makers list there, with water and paint times. How much caulkA calculator for how many tubes of caulk a joint takes, by its length, width and depth, with the makers' own coverage figures. Caulk vs siliconeLatex caulk, 100% silicone, hybrids and polyurethane side by side: paint, water, movement, and the names that mislead. Caulk cure timeHow long caulk and silicone take: the three stages, each product's own water, paint and cure times, and what slows them down. Tub and showerCaulk for a bathtub or shower: which products list it, what each maker means by mildew resistant, and how long before you can shower. Toilet baseCaulk around a toilet base: what the plumbing codes say about the joint, which caulk GE and Oatey name, and the gap-at-the-back debate. Kitchen sinkCaulk for a kitchen sink: the rim bead, drop-in and undermount sinks, and plumber's putty or silicone at the faucet and drain. Countertop and backsplashCaulk for countertops and backsplashes: the counter-to-wall joint, painted walls, and what makers say about silicone staining granite and marble. Baseboards and trimCaulk for baseboards, trim and crown molding: the paintable caulks that list trim, how soon each takes paint, and the silicones that won't. Windows and doorsCaulk for windows and doors: latex inside, silicone or a paintable hybrid outside, and the weep holes window makers say never to seal. SidingCaulk for siding: the exterior sealants that list it, how soon rain can hit each one, their movement ratings, and the vinyl siding joints not to caulk. GuttersSealant for gutters: the products made for gutter seams and end caps, how soon each takes rain, the joint limits, and how makers seal a lap joint. ConcreteCaulk for concrete: crack fillers versus joint sealants, self-leveling sealant for driveways and walks, and when backer rod goes in. Brick and stuccoCaulk for brick, mortar and stucco cracks: the masonry sealants that name them, the widest joint each takes, and the silicones that rule masonry out. Paintable caulkPaintable caulk: each product’s own paint time, why paint won’t stick to 100% silicone, and what “paintable silicone” really is. Over old caulkCan you caulk over old caulk or silicone? What DAP, GE, Red Devil, Sashco and others say, why silicone won’t hold new caulk, and how to get it out. Caulk vs groutCaulk vs grout in tile work: where tile makers say each one goes, the sealants they sell for corners and tubs, and what goes in first. Widest gapHow wide a gap caulk can fill: each product’s own joint limit, from 1/4 inch to 2 inches, and what makers say to use when a gap is bigger. Backer rod sizeBacker rod size: each maker’s rule for how much wider than the joint the rod should be, a joint-to-rod table, how deep it goes, and closed vs open cell.

General guidance from manufacturer and standards data. Products vary, so check the label and the maker's instructions.