There are an overwhelming amount of different caulks out there and choosing the right one for the right job can be a little difficult. Here is a quick guide to eliminate the stress and help you to pick the perfect caulk for your project.

In case you were wondering, caulks generally have two main functions. They are essentially a “filler” used to seal a gap or form a bond between two materials or substrates.

All caulks aren’t created equal so when choosing the right caulk, it’s important to consider:

• Durability
• Elongation
• Adhesion
• If its water resistant

Let’s keep it simple

To complete most projects, there are three main caulks you need to know about.

Acrylic (Acrylic-Latex)

These are the sedans of the caulk world- they are the go to product to address a wide variety of general projects. These products are usually pretty easy to use and have a low odor. For those who would like an acrylic caulk with an increased lifespan and a little more flexibility, choose a siliconized acrylic- latex caulk.

As you are selecting a caulk within this genre, keep in mind that they may include other features that would better serve your project. For instance, consider whether it’s essential that your caulk dries quickly, is paintable or super flexible.

Cleanup

Simply clean up with water and move on to your next project.

Uses

Most acrylic caulks can be used on any interior or exterior project. It can be used on siding, windows, doors, baseboards, trim and moldings. It also bonds well on almost all surfaces like wood, masonry, glass, stucco, plaster and tile. Generally keep moisture away from the application area until the caulk has fully cured.

Silicone

If acrylic caulks are the sedans of the caulk world, then silicone caulks are definitely the luxury models. Silicone caulks are generally waterproof, never loose flexibility and have excellent mildew resistance. Their one flaw is that most cannot be painted, but depending on your project, that may not be a deal breaker.

Cleanup

Most silicones require mineral spirits for cleanup.

Uses

Silicone caulk can be used on both interior or exterior projects. It can be used on windows, doors, skylights, aluminum siding, trim, gutters, vents pipes and air conditioners. It can also adhere to aluminum, ceramic tile, glass, porcelain, fiberglass, vinyl and plastic.

Butyl-rubber

Butyl rubber is more of a specialty caulk specifically created for outdoor projects that require maximum flexibility and resistance to water. These caulks do have a tendency to shrink more than other caulks though.

Cleanup

Like silicone caulk, butyl-rubber requires mineral spirits for cleanup.

Uses

Butyl rubber caulk can be used for many outside projects like gutters, downspouts, chimneys, roof flashings, shingles, skylights, storm doors, windows and below grade areas. It can adhere to fiberglass, wood, concrete, cinder block, masonry, stone, metal, brick and aluminum.

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