While the basic function of caulk and sealant is to seal cracks, gaps and joints to keep out air, water, moisture and dirt, there are several factors you need to consider when deciding which type of caulk or sealant to use: Where am I going to use it? In the bathroom, around crown molding, around exterior window perimeters? Also, does it need to be paintable? Does it need extra mold and mildew protection or extra flex to withstand extreme movement? Do I prefer water cleanup to solvent cleanup? To help you make the right selection for your project, here are some suggestions.

Project Type 1: Kitchens, Bathrooms and Other High-Moisture Areas

Sealants keep out water and moisture to prevent leaks and water damage. In kitchens and bathrooms, they’re used to seal around sinks, showers, tubs, backsplashes and fixtures. As a result, the product you choose needs to have strong adhesion to both porous and nonporous surfaces such as tile, ceramic and natural stone to prevent cracking or loss of adhesion. 

For maximum protection and long-lasting durability, and to save time, look for a sealant that has high mold and mildew resistance and fast water-ready times. Kwik Seal Ultra Premium Siliconized Kitchen & Bath Sealant chec

ks all the boxes. It has lifetime mold- and mildew-resistance protection; repels water, dirt and stains to stay fresh and clean looking; and it’s water-ready in just four hours. Plus, it’s easy to apply, is low in odor and cleans up with soap and water.  

Project Type 2: Gaps, Cracks and Joints Around Interior Windows, Doors and Trim

Sealing gaps, cracks and joints around interior windows, doors and trim helps stop air leaks, saves energy and provides a better finished appearance if painting. A sealant that can be painted, is flexible and has strong multi-surface adhesion is ideal for this application.

Alex Plus All Purpose Acrylic Latex Caulk Plus Silicone is an excellent choice for these projects. It has siliconized additives to provide outstanding flexibility and strong adhesion to a wide variety of surfaces without cracking or chalking. It’s also ready for paint in just 30 minutes, saving you time. Alex Plus is easy to gun and tool, and it cleans up with water.

Project Type 3: Gaps, Cracks and Joints Around Exterior Windows, Doors and Trim

Sealing gaps, cracks and joints around exterior window and entry door frames, as well fascia and trim, helps keep out wind, rain, moisture, dirt and pests. It also helps improve the comfort of your home and saves energy. For these types of jobs, choose a sealant that stands up to the elements by providing maximum flexibility and strong adhesion.

Dynaflex Ultra Advanced Exterior Sealant was formulated specifically for this type of demanding application. In addition to including Weather Max technology, which provides all-weather protection, it offers strong adhesion to a wide variety of building materials, such as wood, vinyl, aluminum, brick and fiber cement. Dynaflex Ultra also stays permanently flexible, so it won’t crack, crumble or break down. It won’t fade, yellow or pick up dirt, and it’s backed by a lifetime mold-, mildew- and algae-resistance guarantee, so the sealant stays looking clean and new. Finally, it’s rain-resistant and ready for light or heavy showers in just one hour.