What Is Caulk

Caulk plays a crucial role in maintaining the integrity of your living spaces by preventing airflow, water leakage, and intrusion of dust or insects. In this comprehensive resource, we delve into what caulking is, its versatile applications in various areas of your home, and how to effectively apply it using a caulking gun.

Explore the benefits of caulking for thermal insulation, moisture protection, and overall comfort in your living environment. Let's dive into the world of caulking and empower you to enhance the warmth and security of your home

Beginner Intermediate Advanced
10 min

Every building and home has gaps and cracks in it, allowing airflow to penetrate. Caulk is the sealing agent that stops this! Caulking is the process used to seal or fill a gap between two surfaces, such as tiles and your benchtop in a bathroom, or wood and metal in your windows. Caulk is an elastic substance that can be moulded into crevices and used in bathrooms, kitchens, floors, roofs, windows, ceilings or any other surface where two edges join.

The purpose of caulking is to provide thermal insulation to a space, stop water leakage or penetration and close gaps where dust, air or insects may be able to enter. Sealing unwanted cracks or holes in your home is a great way to improve the warmth and security of your home.

A caulking gun is the most common tool used to apply caulking sealants to the material that requires it. Interested in learning more about caulking? Read our How To Guide.


Wet Area Silicone

Keep your wet areas mould-free with Selleys Wet Area Silicone, a superior waterproof and mould resistant seal that will not shrink, crack or peel away.

Silicone Remover

Remove old sealant quickly and easily with Selleys Silicone Remover. This powerful formula breaks down old sealant, making it easy to remove and to prepare surfaces.

Sugar Soap Original

Selleys Original Sugar Soap is perfect for cleaning walls and surfaces in your home. Keep your home looking fresh and new with our high-quality, effective cleaner.

How to Guides

How To Use a Caulking Gun

Learn how to use a caulking gun for a professional finish with Selleys step-by-step guide. Get tips & tricks to make the most of your sealant.

Top 5 Sugar Soap Hacks

Discover the top 5 sugar soap hacks with Selleys. Get surprising uses for this versatile product, from cleaning to DIY projects.

How To Fix Metal to Wood

Join metal and wood with ease using Selleys. Our guide will show you how to choose the right adhesive and bond metal to wood.