The Spruce / Liz Moskowitz

Sealantis a similar product, though it has better elasticity than caulk.

Use caulk for kitchen backsplashes, tub surrounds, toilet bases, and other stationary objects.

Additionally, caulk and sealant may be sanded or unsanded.

person using caulk

The Spruce / Liz Moskowitz

Instead, it’s better for applications that only need moderate waterproofing, like a kitchen backsplash.

Solvents may be required for clean up.

It is not a suitable as a masonry replacement or for any significant repairs.

Hands of worker using a tube of caulk for repairing of molding door trim

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It can also be used to fill and repair cracks in masonry-stucco walls.

Stick to water-resistant products, like silicone caulk, for high-moisture areas, like the bathroom or kitchen.

If you are working outdoors, a masonry repair sealant or butyl rubber sealant is likely the best option.

An acrylic latex caulk being applied to molding trim

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Silicone is your go-to whenever you’re sealing something water-relatedbathrooms, kitchen fixtures, bathtubs, even fish tanks.

Acrylic is a good general-purpose sealing substance, perfect for tiny gaps between baseboards and chair rails.

Many manufacturers make different product lines specifically for certain tasks.

Person caulking gutters

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Consider where you will use the caulk and check the label to find the manufacturer’s recommendations for use.

Products with silicone work best in water-prone areas.

Latex acrylic is suitable indoors for use with wood on drywall.

Person using caulk to fill in bricks

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Butyl rubber works well outside for handling roofing and gutters.

Several types of caulks are used for sealing home exteriors like siding, gutters, roofing, and masonry.

Silicone caulk or a silicone-latex hybrid is excellent for exterior windows, doors, trim, and siding.

Crack in cement repaired by caulk

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Butyl rubber is best for outdoor use such as around gutters.

Masonry repair caulk is primarily a urethane-based blend that fills cracks in masonry nicely.

Let’s Talk Caulk: Cost to Caulk Windows, Bathtubs, and More.Angi.