£72.00£237.00 inc. VAT

4.8 out of 5 based on 5 customer ratings
(5 customer reviews)

Self-Cleaning Sealer

A water based, technical silicone silane resin emulsion that imparts excellent water repellency and stain resistance to many external concrete, natural stone and masonry surfaces and is suitable for both residential and commercial façades and renders


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Latest Product Reviews…

“So many products out there that say they are the best, it’s a mind field, I’m so happy I made the correct choice for once.”
Sara L

5 star rating

“I don’t normally leave reviews but this product warrants one, Excellent product really pleased”
Paul Coleman

5 star rating

“Definitely recommend, good product…”
Bricklayer Pete

4 star rating

“I didn’t purchase this product on the website but from my local supplier, I wanted to come on and leave a positive review as this product really does work. Thank you DJ”
Dwayne James

5 star rating

Universeal Rain-Off

Self-Cleaning Sealer

Usage Guidelines

Coverage: Up to 10m2 per litre per coat
Drying Time: 45-60 mins
Applications/Coats: 2 Coats
Application Method:  Sprayer / Mop / Brush
Dilution: Undiluted


Download a PDF Safety Data Sheet
Download a PDF Technical Application Guide


Universeal Rain-Off is a water based, technical silicone silane resin emulsion. Rain-Off serves as a high-quality, general-purpose treatment to impart excellent water repellency and stain resistance to many external concrete, natural stone and masonry surfaces and is suitable for both residential and commercial façades and renders.

The unique formula of Universeal Rain-Off significantly reduces the capillary water absorption of the building or treated surface, but doesn’t clog the pores or capillaries. Therefore significantly reducing efflorescence / salts blooming, organic soiling and moss and algae growth, whilst allowing the surface material the ability to “breathe” and transfer moisture vapour.

Special Features

  • Rapid development of excellent water repellency
  • Significantly reduces efflorescence, moss and algae growth
  • Self-cleaning action reduces the need for regular maintenance
  • Long lasting protection


  1. Universeal Rain-Off is an excellent water repellent for many absorbent mineral substrates, such as bricks, concrete, natural sandstone paving and many types of masonry surface.
  2. Using a sprayer, brush or mop (we do not recommend using a roller) , apply the ready-to-use solution, to saturation. Two coats “wet on wet” are needed to ensure complete coverage.
  3. If rain is forecast or starts, then stop treatment immediately and cover the freshly impregnated areas, the surface is required to stay completely dry for the first 6 hours after application.

Please Note:

Always try product in an inconspicuous area prior to use.


Up to 10m2 per litre per coat
Dependant on porosity of surface. Check the surface after application to ensure full effectiveness of repellent.

Storage Information:

Product lifespan symbolsProduct shelf life is 12 months from production date (shown on cap) when unopened and stored at room temperature. After opening, use within 3 months.

External Chemicals: Handling

Please note, our outdoor chemicals must always be handled with care. Upon receipt of your goods, you should open the packaging in a safe, suitable outdoor environment. Despite our best efforts with robust, layered packaging, there is always a small risk that damage or leakage could occur during transit. Our chemicals have the potential to damage sensitive surfaces if left unattended and we do not recommend that you store them indoors unless specifically indicated.


H302: Harmful if swallowed.
H315: Causes skin irritation.
H319: Causes serious eye irritation.

P102: Keep out of reach of children.
P262: Do not get in eyes, on skin, or on clothing.
P280: Wear protective gloves.
P301+330+331: IF SWALLOWED: rinse mouth. Do NOT induce vomiting.
P302+350: IF ON SKIN: Gently wash with plenty of soap and water.
P305+351+338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P309+311: IF exposed or if you feel unwell: Call a POISON CENTRE or doctor.
P332+313: If skin irritation occurs: Get medical advice.
P337+313: If eye irritation persists: Get medical advice.

Product SDS sheet available to download from the downloads tab.

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Additional information

Weight 6 kg
Dimensions 20 × 18 × 30 cm
Size Option:

5 Litre, 25 Litre

Customer reviews

Rated 4.8 out of 5 stars
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    Is this sealer breathable?

    Yes, using our nano-coating technology this sealant will create a durable barrier, whilst allowing full vapour transmission. So the end result is a protective coating that is 100% breathable.

    Can this be used on flooring as well as walls?

    Yes, Rain-Off will work equally well on both walls and floor surfaces. It is ideally suited for garden brickwork that often features horizontal and vertical surfaces.

    How long does it take to dry / cure?

    With optimal weather conditions, it should dry within 45-60 minutes. Times will be longer if it is cooler and if there is moisture in the air. Try to apply the sealer when warm, mild and dry weather is forecast for best results.

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