Silicone sealant: what is it?

by Joost Nusselder | Updated on:  June 11, 2022
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Silicone sealant is a type of silicone-based material that is used as an adhesive or sealant. It is available in a wide variety of formulations, each designed for specific applications.

Silicone sealants are often used in construction and automotive applications where they provide a waterproof and weatherproof seal.

Silicone sealant

They are also used in many household applications, such as sealing around windows and doors.

Silicone sealants are available in both clear and pigmented formulations, and can be applied to a variety of surfaces, including metal, glass, ceramic, plastic, and wood.

Silicone sealant, waterproof finishing in an instant

Waterproof finish with silicone sealant and where is silicone sealant applied.

silicone sealant

There are many sealants on the market today. The choice you have to make is becoming increasingly difficult because new products with new properties are constantly being introduced. However, there are 2 main groups that you need to remember: silicone sealants and acrylic sealants. In addition, there are fillers, repair kit, and glass kit.

With silicone sealant you can finish everything waterproof

You use silicone sealant to seal seams in bathrooms, kitchen countertops and other damp areas. The sealant with silicone that you have to use for this is sanitary sealant. Silicone sealant is very elastic and cannot be painted over! Silicone sealant hardens by absorbing water and you can apply it in glossy and transparent. Another big advantage is that they repel mold!

An important tip about silicone sealant

Silicone sealant cannot be painted over! If a bathroom has been sealed and there is a frame next to it, you should proceed as follows: first degrease very well and then sand lightly. Then apply a universal primer and apply it in such a way that you apply it 1 mm from the sealant. If you paint directly against the sealant, you will get pits in your paintwork, the sealant presses the paint away, as it were. You also do this when painting: paint 1 mm from the sealant!

Sealing step by step

First remove sealant residues with a silicone sealant residue remover. Then degrease well and apply a primer to porous surfaces and plastics. Then apply tape on both sides and apply the sealant. Wet the joint sealant with soapy water. Go over the sealant edge with a half-sawn plastic tube (where current wires pass) to remove excess sealant. Then immediately remove the tape and then smooth it again with soapy water. This gives you a perfectly finished sealant that is completely waterproof. Do not shower until the sealant has cured. Usually this approx. 24 hours. I wish you the best of luck with sealing!

I'm Joost Nusselder, the founder of Tools Doctor, content marketer, and dad. I love trying out new equipment, and together with my team I've been creating in-depth blog articles since 2016 to help loyal readers with tools & crafting tips.