Thompsons Water Seal - 5 Litre
Not Available
Currently unavailable
Currently out of stock
This product is not available at the moment. Check back later.
Product Information
Full details
Thompsons Water Seal is designed for homeowners and contractors looking to protect exterior masonry from moisture damage without the need for extensive surface preparation. The primary benefit of its unique micro silicone emulsion is the ability to be applied directly to damp surfaces, saving significant time during projects. However, users should note that because it is a clear sealant, it may not mask existing stains or imperfections on the substrate, making it best suited for preventative maintenance or clean, healthy masonry.
All features
| Model Part Number | 36286 |
|---|---|
| Brand | Thompsons |
Extended Product Information
FAQs
Can I use this on internal walls?
No, this product is specifically formulated for exterior use where ventilation is sufficient to allow for the release of solvents during the drying process.
Does it change the color of the brick?
The sealant is clear and typically leaves the original appearance of the masonry unchanged once fully cured.
How long does the protection last?
Durability depends on the weather exposure and the porosity of the material, but it is designed to provide long-term protection against the elements.
Can I paint over it later?
Generally, you should not paint over a water-repellent sealant as the silicone will prevent the paint from adhering properly to the surface.
Is it safe for plants?
Avoid direct contact with plants and foliage during application, as the product is designed to seal surfaces and may damage plant tissues.
What is the best way to apply it to a large wall?
A low-pressure garden sprayer is the most efficient tool for covering large vertical surfaces, ensuring an even application across the entire area.
Troubleshooting
White residue appearing after application
This is often caused by over-application. Wipe away excess product before it dries and ensure the surface was sufficiently porous to accept the treatment.
Water is still soaking into the brick
The masonry may have been too saturated or the surface was too dense to allow for deep penetration. Re-evaluate the surface porosity and re-apply once the area is slightly drier.
Pros and Cons
Pros
- Can be applied to damp surfaces saving time on waiting for dry weather
- Micro silicone formula ensures deep penetration for long-term protection
- Creates a breathable barrier to prevent internal pressure buildup
- Suitable for a wide variety of masonry substrates
Cons
- Clear formula does not cover or hide existing surface discoloration
- Not suitable for use on non-porous surfaces like glazed tile
- Requires careful application to avoid run-off on non-masonry surfaces
Setup, Compatibility & Care
To ensure maximum effectiveness, start by removing any loose debris, moss, or dirt from the masonry using a stiff brush or a pressure washer. While the product is designed for damp surfaces, remove any pooling or standing water before application.
Apply the sealant liberally using a brush, roller, or low-pressure sprayer. Ensure uniform coverage, paying special attention to porous mortar joints where water ingress is most likely. If the surface is highly absorbent, a second coat may be applied while the first is still damp to ensure complete saturation. Clean all application equipment with soap and warm water immediately after use to prevent the silicone emulsion from hardening on tools.