How to Smooth Butyl Caulk

A caulk gun and caulking supplies laying on the floor of a shower.
  • 1-3 hours
  • Beginner
  • 0-40
What You'll Need
Warm water
Butyl caulk
Caulking gun
What You'll Need
Warm water
Butyl caulk
Caulking gun

Butyl caulk is a highly recommended sealant. It is considered as one of the most reliable sealants available in the market. The main function of butyl caulk is to fill in spaces that are bigger compared to the standard household joints. Butyl caulk is intended for spaces that can be found in most kitchens and bathrooms. The reason why many people use butyl caulk is because it is extremely water resistant.

Compared to other sealants in the market, butyl caulk’s water resistant nature is by far the best. The reason why it is very water resistant is because it can quickly harden. Butyl caulk is also able to stand off sudden paint movements. The resulting compound from this sealant provides a sturdy bond suitable for metal, stone, concrete, and brick. The only downside is that its application can sometimes be messy. In order to use butyl caulk effectively, it is important to learn how to properly apply it.

Step 1 - Warm the Sealant

Before using butyl caulk, it helps to warm it slightly. If your sealant in a plastic casing, try soaking it first in warm water. Soak the butyl caulk for a few minutes preferably until it no longer looks stiff. Generally, the time interval for soaking spans around 20 minutes. Cold temperatures usually make it harder to extract the sealant from the caulking gun so the soaking time may take longer.

Step 2 - Load Sealant into the Caulking Gun

Place the butyl caulk pack into the caulking gun. Before applying the sealant, make sure that the surface does not have any residue or debris. Different particles can affect the application of the sealant.

Step 3 - Apply a Coat of Butyl Caulk

Make sure to apply a sufficient amount of butyl caulk to the seam’s end. Gradually apply the sealant from one end to another. Make sure to follow the shape of the surface you want the butyl caulk to get into.

Step 4 - Do Not Spread Butyl Caulk

Since the butyl caulk is a different type of sealant, it is very hard to smooth out like a normal sealant. Since this type of sealant almost hardens too fast, it's best if you immediately try to smooth it out right after application. Try to flatten it as quickly possible.

Note of caution: It's best that you don't force smoothing the surface of the butyl caulk once it becomes slightly hard. Try to scrape off the parts of the remains of the sealant so that the surface appears clean and smooth.

Step 5 - Allow Sealant to Sure

Do not paint the butyl caulk right after its application. You have to wait for a couple of days before trying to do anything. Although it hardens, butyl caulk takes some time to completely dry. If you try to paint it right after a few hours, you’ll end up messing the whole application.

If you want to reapply butyl caulk, it’s best to research on numerous resources before doing it. Take note of the precautionary measures and recommendations. To ensure that you have the right thing, it’s best to consult an expert after.