How to Apply Silicone Sealant

Silicone sealant is a versatile material used in many do-it-yourself projects. If you need to seal a bathtub or a corner, silicone sealant is your best friend. Silicone sealant is similar to caulk, but it’s usually clear or opaque instead of white and looks more like a gel. It is not sensitive to temperature, and it can withstand all kinds of chemicals, moisture, and weathering, making it a great choice for your household needs.

Utilizing a Silicone Gun

1. Press down on the gun’s release tab and pull the pressure valve

This is the long, metal plunger in the back, usually underneath the release tab. This will allow you to load the tube of silicone sealant.

2. Insert the tube of silicone into the gun

Insert it at an angle, base first, and then push it up into the gun. The nozzle of the silicone tube should be sticking out of the opposite end from the release tab and pressure tab. squeeze the trigger slowly and gently until the mechanism touches the silicone tube. You will then be able to lock the silicone tube firmly in place.

3. Prepare the surface you wish to seal

Before you apply silicone sealant, make sure that the surface is completely free of any dust, dirt, or particles. Any bits of matter can potentially cause a weaker seal. To prepare your surface: Soak a sponge in soapy water and wipe down your surface. Rinse out your sponge and use it again to wipe down the area. Dry off the area with a towel.

4. Cut a hole in the silicone tube

Snip the tube at a 45 degree angle, and as close to the tip as possible. This will ensure that the hole is very small, making it easier for you to control the flow of sealant. You can use either scissors or a utility knife to cut the sealant tube. If the sealant is not flowing to your liking, snip a little bit more off of the tube. Gradually cut small bits off until the sealant is flowing at the desired pace.

5.Apply the sealant to your surface

Squeeze the trigger as evenly and steadily as possible. Drag the tube nozzle slowly along the seam of your project. Spread the sealant evenly. Wet your finger, and have a container of water nearby. Use your finger to spread the sealant evenly. While most silicon sealants will feel dry to the touch within 30 minutes to an hour, this does not mean the seal is ready. Wait at least 24 hours for the seal to dry before using your project.

Using a Can of Sealant

1. Use a window scraper to remove any unwanted residue

Make sure your surface is absolutely clean so that the sealant will adhere properly. If you are resealing surface, the window scraper will help you pull away bits of previous sealant or caulk. A cleaning brush and some paper towels will work for this. Make sure that your surface is absolutely dry. Use extra paper towels if necessary.

2. Cut the tip off of the can of sealant

You can even use your window scraper to do this. Lay it flat on a cutting board and take off the tip at a 45 degree angle. If the hole isn’t big enough, you can always cut a little more off later. It’s okay if too much comes out initially. You can neaten this up and wipe off the excess later. while it may seem to be dry much sooner, it’s best to give it 24 hours to fully set.

source: wikihow