Can you use Thompson's water Seal on brick?

Author: Lucie Tremblay  |  Last update: Wednesday, July 8, 2026

Thompson's® WaterSeal® Clear Masonry Protector Waterproofer provides proven waterproofing protection for pavers, brick, concrete, stone, stucco, clay & quarry tile and exterior masonry surfaces.

How long does Thompsons Water Seal last on brick?

Water Seal can only be used on bare and uncoated brick, stone or concrete. How long will Water Seal last? If applied correctly, Water Seal will last up to 4 years. This is dependent on conditions such as orientation of the wall and local climate.

How do you apply Thompsons Water Seal to brick?

Apply using a brush or roller. If you're applying onto a wall, work in 1m sections from the bottom upwards. Once an area is fully saturated move onto the next section. Make sure you also coat mortar lines.

What kind of sealant can you use on brick?

Silane/​Siloxane sealers provide the greatest benefit when it comes to protecting all masonry materials, including stone, brick, paver and concrete. They chemically react with the surface to form a hydrophobic barrier within the pores.

Can you water seal brick?

Waterproofing the porous surface with a dependable waterproofer can extend the life of the surface and help keep it looking great, longer. Testing the brick, concrete or masonry surface to see if it needs protection is essential before starting your project.

Thompson's Water Seal

Is Thompson water seal good for brick?

Thompson's® WaterSeal® Clear Masonry Protector Waterproofer provides proven waterproofing protection for pavers, brick, concrete, stone, stucco, clay & quarry tile and exterior masonry surfaces.

What is the best waterproofing for brick?

The best form of clear waterproofing treatment is what is known as a 'masonry cream'. These are clear, gel like treatments that chemically bond to brick and any other mineral surface, rather than create a film.

Is waterproofing bricks a good idea?

Particularly if the brickwork is in an area such as a kitchen or bathroom, it will be prone to damp, so sealing the bricks will be essential. This also makes them easier to clean and will ensure they last longer. Using a water sealant on internal brickwork will help protect it from light, moisture and wear and tear.

Is there a sealant to put on brick to keep moisture away?

Application of the brick sealer will alter the chemical structure of any brick or masonry surface providing a excellent water repellent and stain resistant surface. Suitable for bricks, masonry and facades and protects against water ingress into brickwork and soiling.

What can I use to seal a hole in brick?

Or, as you say you're ready to do, you can tackle the work yourself and gradually build up your skill set. To patch holes in bricks, there are two ways to proceed: Use caulk, or plug with a little mortar.

How many years does Thompsons Water Seal last?

On average, Thompson's water seal will last for about 5 years. Depending on the weather patterns in your area, this deck sealer might need your attention more often. In a rainy state, you might need a fresh coat of water seal for ultimate protection every 2-3 years.

How to remove Thompsons Water Seal from brick?

How to remove Thompsons Water Seal from wood, concrete, brick and masonry! Use EC-1800 a natural, eco friendly formulation that will remove Thompsons Water Seal from any surface that is compatible with water. EC-1800 contains beneficial microbes and a blend of surfactants, rust inhibitors.

What can Thompsons Water Seal be used on?

Proven to waterproof concrete, brick, exterior wood and other exterior surfaces. Use as a concrete waterproofer, brick sealer and wood sealer.

What happens if it rains on Thompson Water Seal?

Thompson's Water Seal has been reformulated to last longer than standard waterproofers. It is long lasting, even under heavy moisture conditions, and is not destroyed by ultraviolet light.

How often should exterior brick be sealed?

According to House Caravan, brick sealing is typically required every five years or so. Let's take a look at a few common signs that your brick may need resealing soon. One of the main signs that you need to look into brick sealing is cracked mortar. These will typically be immediately visible.

Does Thompson's Water Seal peel off?

Ease of Reapplication

Because Thompson's Water Seal tends to wear off quickly and doesn't have a need to penetrate it is easy to reapply. As long as there is no peeling you can simply put another coat of sealer over the last one. It will be best to clean the wood before you do this.

What is the best sealant between brick and wood?

Acrylic Latex

They are easy to use with a caulk gun, easy to work with, clean up quickly, and are paintable once cured. Adheres to: Wood. Brick.

What is the best way to waterproof a brick wall?

Water Repellent Sealants and Creams for Un-Painted Masonry Bricks. If you want a waterproofing solution for unpainted plaster or brickwork, you can apply a facade cream to deter rain and moisture entry into your building for some years.

What happens if you don't seal brick?

What happens if you don't seal the brick? If you don't seal the brick, the brick will absorb water and weaken the porous brick masonry and mortar.

How do you keep moisture out of bricks?

You could apply Crommelin 2L Dampstop to the inside of the wall as it's one of the only products that can be applied on the inside; most waterproofers need to be applied to the outside of the wall. Once this product has cured, you can paint over it with water-based paint.

What are the disadvantages of waterproofing?

Cons Of Waterproofing
  • High Initial Costs. The upfront waterproofing costs can be substantial, especially if external methods are used. ...
  • Regular Maintenance May Be Required. ...
  • Temperature Sensitivity. ...
  • Potential For Incorrect Installation. ...
  • Reduced Breathability.

Can old brick be sealed?

Waterproofing old brick can be accomplished by coating the exterior of the masonry with a silane or siloxane penetrating sealer, a vapor permeable hydrophobic paint, or a traditional lime-based non-polymer modified stucco with a vapor open hydrophobic coating.

Is Thompson's water seal breathable?

The breathable waterproofing membrane allows moisture vapour inside the substrate to evaporate whilst protecting against water penetration and damage.

What's the best way to seal bricks?

However, in the majority of cases, choosing a penetrating sealant that allows bricks to “breathe” is ideal to prevent water damage yet still allow excess moisture to escape. Siloxane is a good choice for this type of penetrating sealant because it enters the brick to fill cracks internally.

What is the difference between a waterproofer and a sealer?

What's the Different Between a Sealer and a Waterproofer? Sealers and waterproofers perform similar functions, but they differ slightly in how they work. A wood or concrete sealer will protect the surface. Waterproofers are more durable than sealants because they penetrate the surface, filling in leaks or gaps.

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