Blackfriar Exterior Water Seal – Long-Lasting Waterproof Protection for Walls

Blackfriar Exterior Water Seal provides powerful, long-lasting waterproofing protection for exterior walls. The silicone-based formula stops moisture, water, and damp from penetrating brick, stone, and other porous surfaces. Ideal for exposed walls and older buildings, it helps preserve the structure and appearance of your property. (Not suitable for limestone or wood.)

Key Features:

• Creates a durable, long-lasting waterproof seal

• Ideal for exposed and porous walls

• Colourless finish preserves natural appearance

• Suitable for use on old and new properties

• Silicone-based formulation for maximum protection

• Exterior use only

Application Information:

• Coverage: 2–4 m²/L per coat

• Hard Dry: 12 hours

• Thinning: Consult technical data sheet

Surface Preparation

Ensure surface to be treated is clean, sound and firm, with any cracks filled. Do not use alkaline or acid detergents or cationic surfactants. Mould growth should be treated with Blackfriar Anti-Mould Solution and allowed to dry. It is advisable to wait 28 days before treating fresh masonry.

Technical Data

• Exterior use.
• Provides long lasting water-proof protection.
• Silicone-based.
• Ideal for exposed & porous walls.
• Colourless.

Coverage - 1 Litre covers approximately 2-4m2 depending on surface porosity.

Drying Time - 12 hours. Drying times are based on an ambient temperature of 20°C and 50% relative humidity. Lower temperatures or higher humidity will prolong the drying and overcoating times.

Directions for Use

Ensure the product is thoroughly shaken prior to use. Apply 1 coat liberally by brush, roller or low pressure spray until the surface is saturated. Apply from bottom of wall and work upwards. It is normal for the product to run down the surface (up to 30 cm) - this will not
be visible when it has dried. On very porous surfaces, a second coat is necessary as soon as the first coat has lost its glossy appearance.

Data Sheets

Blackfriar Exterior Water Seal TDS

Blackfriar Exterior Water Seal MSDS