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Kiss water damage goodbye!

Waterproof sealant: permanent protection from mould and moisture

What’s the trick to keeping your house free from moisture? Waterproof sealant! The right waterproof sealant or caulk prevents water from seeping in, keeping your house safe and dry for years to come. Read on for recommendations on the best waterproof sealant.


Waterproof sealant (sometimes also known as waterproof caulk) is the key to preventing water damage at home. You can use waterproof sealant everywhere, from the bathroom to the roof. Here are some of the most common uses:

  • windows and doors
  • sinks, showers and baths
  • pipes and gutters
  • vents
  • roof flashing
  • gaps, cracks and holes

If there’s any chance that the area is exposed to water or moisture, you should always opt for waterproof sealant rather than a standard silicone sealant. Check the product label and instructions carefully before use.


Here’s how to apply waterproof silicone sealant for lasting results:

  1. Remove old caulk or sealant. Work with a putty knife or scraping tool. For particularly stubborn sealant, use UniBond Silicone Sealant Remover.
  2. Remove residue. The area should be completely clean. Use alcohol, bleach or a household cleaning product. Leave it to dry before applying the new sealant.
  3. Use a high quality silicone gun to apply the waterproof sealant. Test the gun on some scrap material first, then squeeze the trigger, applying even pressure, as you slowly drag the nozzle along the seam.
  4. Smooth the sealant. Use a smoothing tool such as this UniBond Smoother & Cutter tool for the best results.
  5. Wait for the sealant to dry. You should wait at least 24 hours before using the surface.

The best waterproof sealant

For super strong and flexible seals around the house, try UniBond Universal Sealant. This versatile silicone sealant can be used on just about anything, from windows and doors to gutters. It’s waterproof and durable, offering years of protection.

If you’re looking for a waterproof caulk or sealant with an extra safeguard against mould, UniBond Sanitary Sealants are the solution. They’re ideal for kitchen and bathroom use, providing long-term anti-mould protection. UniBond Triple Protection Anti-Mould Sealant comes with a 35 year guarantee!

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