- 1). Figure out if you need to paint the caulk once it's dry. If you do, choose latex over silicone.
- 2). Get 100% silicone caulk if you're using it in harsh conditions, such as outdoors or in extreme temperatures.
- 3). Check out the site you're using the caulk on. If the gap might shift, such as expand or contract, at any time, use silicone caulk, which can expand and contract with the gap.
- 4). Look at the site of your project, paying attention to the amount of sunlight it received. Silicone caulk does much better in direct sunlight than latex caulk.
- 5). Factor in how porous the surface to be caulked is. Latex caulk can be used on both porous and non-porous areas, while silicone is limited to only non-porous.
- 6). Select the caulk based on any other special features you need, such as caulk that fights mildew in kitchens and bathrooms, caulk that can be used on roofs, gutter systems, concrete or blacktop, caulk that can block fire or adhesive caulk, which can seal and connect two pieces of material.
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