FREE Delivery to mainland UK excludes highlands
£5.95 – £99.00
Breathable Brick Sealer & Waterproofer is a water-based impregnating sealer, suitable for sealing exterior brickwork. This breathable exterior brick sealer can be applied to porous clay-based brick, cement-based brick, natural stone & general masonry.
Breathable Brick Sealer & Waterproofer is suitable for use on external modern cavity brick walls and rubble-filled solid walls. This external brick sealer is suitable for use on listed buildings or anywhere retaining a breathable surface is paramount. This breathable sealer will leave the brick with an unaltered natural matt finish.
Select from a 5 litre, 10 litre or 20 litre container
Please click here to view all our products for cleaning and sealing bricks, you can also view our handy ‘how to’ guides for cleaning and sealing bricks.
Breathable Brick Sealer & Waterproofer is a water-based impregnating sealer suitable for sealing exterior brickwork. Breathable Brick Sealer & Waterproofer can be applied to any porous clay-based brick, cement-based brick, natural stone & general masonry. This penetrating sealer resists rainwater penetration, UV light, carbon deposits and organic growth. Rapid drying – free from solvents & VOCs.
This highly effective brick wall sealer will last 10 years or more on exterior walls. Impregnating sealers have a greater resistance to UV light, rainwater penetration & carbon deposits than normal acrylic sealers. Impregnating sealers are superior to surface acrylic sealers which are film-forming, this film or ‘skin’ can lead to trapped moisture. Impregnating sealers cannot trap moisture and are 100% breathable.
Breathable Brick Sealer & Waterproofer is non-film forming, it does not alter the appearance of the sealed surface. The sealing polymers are deposited within the pores of the brick, thus sealing from within. Breathable Brick Sealer & Waterproofer is suitable for sealing old rubble-filled walls so appropriate for use on listed or historic buildings. But can also be applied to newly built brick walls & other structures.
The sealer is non-film forming, so cannot trap moisture and will not require stripping in the future. This form of external brick sealer can simply be reapplied if the porosity of the brick increases over time.
This product is easy to apply using a low-pressure sprayer in one generous application with a light top-up application approximately 40 minutes later. Once the sealer has been applied please redistribute any areas where the sealer may have collected or pooled within 20-30 minutes. This can be completed using a brush or roller, this ensures no sealer has been left on the surface. Very porous bricks may absorb all the sealer immediately.
Do not allow any sealer to simply dry on the surface, it should all have been absorbed into the treated surface or be removed (where present) after 20-30 minutes.
Please adjust the amount of sealer being applied based on porosity. Old Victorian clay bricks will be more porous than a modern dense house brick. Sand-blasted brick and masonry will be very porous. Very dense surfaces may not require a 2nd application, please carry out a test before any application to check the level of porosity of the material to be sealed.
This product can also be applied indoors, typically to surfaces in wet areas which cannot be sealed with our Interior Brick Sealer & Dustproofer.
Available in 5 litre, 10 litre & 20 litre containers with free economy shipping and express delivery shipping options. Samples are available.
Please read the full instructions & related information contained within the Technical Data Sheet. If you require help choosing a sealer or cleaning product contact us at info@floorseal.co.uk
Approximately 5m2 per litre when applied in a single application.
A coverage rate of up to 10m2 per litre can be achieved on dense brickwork or masonry.
Test to obtain the correct coverage rate as it will vary depending on porosity.
| UK Mainland | FREE 3-5 working days Express 1-2 working days £3.95 Saturday Order by 1pm Friday £7.99 |
| Scottish Highlands | £4.99 5-7 working days |
Orders placed before 1pm are despatched on the same day Monday – Friday. No orders are despatched on weekends or bank holidays. Unfortunately we are unable to ship to Northern Ireland and offshore islands. Please visit our Delivery Page for further information.
Please email us with your product order number for SDS information.
For the latest guides and information on best user practices, click here.
Breathable Brick Sealer & Waterproofer allows full water vapour transmission so no trapped moisture or moisture clouding issues will occur. The sealer soaks into the pores of the brick, so seals from within. It is non-film forming so will not form a surface skin or lacquer.
Breathable Brick Sealer & Waterproofer penetrates the brick work and any obvious excess (where present) is to be removed. The treated surface retains an unaltered natural appearance.
As long as the brick & pointing is porous you can apply this sealer. It is also suitable to seal other porous surfaces like concrete and natural stone.
Breathable Brick Sealer & Waterproofer is a fully breathable impregnator so allows full moisture vapour transmission. It is suitable for use on the exterior walls of a listed building.
10 years +
There will always be variation in coverage rates, some bricks are more porous than others. 5m2 per litre for general porous brickwork is achievable. You may achieve 10m2 on dense surfaces. Test and adjust according to local conditions.
Yes – Please redistribute any sealer which is pooling or collecting. This can be carried out with a brush or roller within 20-30 minutes of application. Do not allow the sealer to simply dry on the surface if it has not penetrated the pores of the brick by this time.
On more porous brickwork you may not see any excess. In this situation always lightly overspray to ensure full protection.
It is a water-based impregnating sealer. The polymers contained penetrate the pores of the treated surface, so it is 100% breathable.
Impregnating sealers do not trap moisture, they never require stripping. Impregnators can easily be reapplied when porosity returns to the brickwork. Impregnators do not alter colour or create a sheen. Impregnators are 100% breathable. Impregnators have a long lifespan.
Typically surface sealers can trap moisture and do require stripping before any reapplication. Surface sealers are non-breathable. They can create a sheen as they are film forming. Surface sealers are prone to cracking and usually have a short lifespan.
Breathable Brick Sealer & Waterproofer can be applied to sand blasted bricks or masonry. You will need to apply more product than normal as the surface will be highly porous.
Breathable Brick Sealer & Waterproofer is not an anti-dusting sealer. To seal interior brick walls against dusting please use Floorseal Interior Brick Sealer & Dustproofer.
You may still wish to use Breathable Brick Sealer & Waterproofer in wet areas i.e to seal shower cubicles walls.
Render Cleaner Softwash Solution or Green Remover Concentrate which are available in the cleaners section on this website.
Our products are easy to apply using non specialist tools
Full strength professional cleaning and sealing products
Help and support with application methods and top tips!
