How to clean before applying silicone sealant

Silicone sealant is a type of adhesive used to create a watertight seal between two surfaces. It is made of silicone, a polymer that is known for its durability and resistance to weathering. Silicone sealant can be used on a variety of surfaces, including metal, plastic, glass, and wood. It is available in both liquid and paste form, and it can be applied using a variety of methods, including a caulking gun or brush.

Why clean before applying silicone sealant?

There are a few reasons why it is important to clean surfaces before applying silicone sealant. The first reason is that silicone sealant will not stick to a dirty surface. If the surface is not clean, the silicone sealant will slide right off. The second reason is that if there is dirt or dust on the surface, it will get trapped in the sealant and create bumps and ridges. This will make the sealant less effective and it may eventually fall off. Finally, if there is any grease or oil on the surface, the silicone sealant will not adhere to it and will also eventually fall off.

How to clean before applying silicone sealant

When it comes time to re-caulk or seal a surface, the first step is always to clean the area. This ensures that the silicone has a good grip and won’t be sliding around on top of dirt or old caulk

There are a few ways to go about cleaning the surface. For small areas, using a toothbrush and some hot, soapy water will do the trick. For bigger areas, using a pressure washer can help remove any built-up dirt or debris. 

Once the surface is clean, allow it to dry completely before applying the silicone sealant. Applying silicone to a wet surface will not result in a proper seal, and may cause the sealant to peel or flake off over time.


Silicone sealant is an affordable and efficient way to fix and prevent leaks in your home. It is important to read the instructions carefully, and follow the steps outlined in order to get the best results. If you have any questions or concerns, be sure to consult with a professional before starting your project.

Leave a Comment