Sealant: Everything You Need to Know

Sealants are essential for both DIYers and professionals alike, but the terminology and variety of uses can sometimes be confusing. This handy guide answers the most common questions about sealant to help you choose and use the right product confidently.

What is a sealant?

A sealant is a substance used to block the passage of fluids through the surface or joints or openings in materials. Sealants are typically flexible, waterproof, and used in both construction and home improvement to create a protective barrier.

Where can sealant be used?

Sealants can be used in a wide range of applications, including bathrooms, kitchens, windows, doors, exterior walls, roofs, and flooring. It is suitable for both indoor and outdoor use, depending on the type.

What types of sealant are available?

There are several types of sealants, each offering unique benefits for different tasks:

• Silicone Sealant: Known for its flexibility and excellent water resistance, silicone sealant is perfect for bathrooms, kitchens, and any areas prone to moisture. It adheres well to smooth, non-porous surfaces like glass and ceramic.
• Acrylic Sealant: Acrylic sealant is ideal for interior use where there's minimal movement. It can be painted over, making it suitable for sealing gaps along skirting boards, walls, and ceilings. It offers moderate flexibility and is easier to clean up than silicone.
• Polyurethane Sealant: This type offers high durability and strong adhesion to a wide range of materials, including wood, metal, and concrete. Polyurethane is often used in construction and automotive applications due to its robustness and resistance to wear.
• Hybrid Polymer Sealant: Combining the best characteristics of silicone and polyurethane, hybrid sealants offer excellent adhesion, flexibility, and weather resistance. They are highly versatile and suitable for both indoor and outdoor use.

Choosing the right sealant depends on the specific requirements of your project, such as exposure to moisture, paintability, flexibility, and the type of surface being sealed.

How long does sealant take to dry?

Drying time depends on the type of sealant and environmental conditions. Most sealants are touch dry within an hour but can take up to 24 hours to fully cure.

Is sealant waterproof?

Yes, many sealants are waterproof once cured, especially silicone and hybrid types. This makes them ideal for use in wet or damp environments such as bathrooms and kitchens.

How do I apply sealant?

Sealant is typically applied using a caulking gun. The surface should be clean and dry. Apply a steady bead of sealant into the joint or gap, then smooth it out with a finishing tool or finger.

Can I remove old sealant?

Yes, old sealant can be removed using a scraper or sealant remover. It’s important to ensure the surface is clean before applying new sealant to achieve a strong bond.

What surfaces can sealant adhere to?

Sealants can bond to a variety of surfaces including tile, glass, metal, wood, concrete, and plastic. Always check the product label for surface compatibility.

What colours do sealants come in?

Sealants are available in a variety of colours including clear, white, black and grey, as well as glitter varieties. This allows you to match or contrast with your surfaces as desired.

Whether you're sealing a bathroom, upgrading your kitchen, or taking on an outdoor project, the right sealant can make all the difference. With a wide selection of high-quality options, Hemway has everything you need to complete your job to a professional standard. Explore our full range to find the perfect sealant for your needs and enjoy reliable results that last.