Sika 402 WaterSeal is a high performance, transparent masonry water repellent designed to protect exterior surfaces from water penetration. The advanced silicone resin formula penetrates deep into the substrate to create long-lasting protection while still allowing the surface to breathe.

Ideal for brickwork, stone, render and pebbledash, this water-based treatment creates a strong water-beading effect that helps reduce damp penetration, frost damage and weathering while maintaining the natural appearance of the surface.

Easy to apply by brush, roller or garden sprayer, the solvent-free formula is non-flammable and suitable for use on slightly damp surfaces, making it a practical solution for both DIY users and professional tradespeople.

Key Features

• High performance water repellent masonry sealer

• Protects brick, stone, render and pebbledash

• Deep penetrating silicone resin formula

• Long lasting water beading protection

• Allows surfaces to breathe while repelling water

• Solvent free and non-flammable formula

• Suitable for application by brush, roller or sprayer

• Can be applied to slightly damp surfaces

Specifications

• Brand: Sika

• Product Name: 402 WaterSeal

• Size: 5 Litres

• Colour: Milky white liquid, dries clear

• Coverage: approx 5 to 8 m² per litre depending on surface porosity

• Application: Brush, roller or garden sprayer

• Substrates: Brick, stone, masonry, render, pebbledash

• Technology: Silicone resin water repellent

• Use: Exterior masonry protection

Approximate dimensions and specifications may vary slightly depending on packaging batch.

Brand Information

Sika is a global manufacturer of specialist construction chemicals and building materials, supplying professional solutions for sealing, bonding, waterproofing and protection used across construction and industry worldwide.

Why Buy From Us

Trusted UK Supplier

Fast dispatch from UK stock

Competitive pricing

Friendly customer support

Delivery

We aim to dispatch all orders placed by 1pm the same day.

We offer 2 delivery services:

Standard 3-5 working day - £5.95

Next Working Day - £7.99

Please note that some items on our site do come direct from the supplier and may not be available on Next Day Delivery.

Collection

We offer a click and click service from our Dundee Depot.

We aim to have orders ready to collect within 24 hours. Please note that this may not be possible if the item is not held in stock and needs to come on from the supplier.