BIOKIL AquaDry ExtremeForce Masonry Water Repellent – 25L

BIOKIL AquaDry ExtremeForce Masonry Water Repellent

Extreme-Performance Protection for Exposed External Masonry

BIOKIL AquaDry ExtremeForce is a premium, solvent-borne masonry water repellent engineered to provide exceptional protection against driving rain and penetrating damp in severely exposed environments. Its advanced hydrophobic technology lines the micro-capillaries within mineral substrates, aggressively repelling rainwater while allowing water vapour to escape.

Designed for professional remedial and building-restoration applications, ExtremeForce penetrates the masonry and cures to create an invisible, breathable barrier. It significantly reduces capillary water absorption without creating a surface sheen or darkening the natural appearance of brick and stone.

Key Features & Benefits

• Extreme hydrophobic performance for severely exposed masonry
• Protects against driving rain and penetrating damp
• Produces exceptional water-beading performance
• Penetrates and lines the substrate's micro-capillaries
• Remains fully breathable and allows water vapour to escape
• Dries completely clear with an invisible matt finish
• Does not darken suitable brickwork or natural stone
• Significantly reduces capillary water absorption
• Helps suppress moss, algae and mould by keeping masonry drier
• Helps reduce moisture-related efflorescence and salt staining
• Drier walls may help reduce internal cold spots and condensation
• Helps reduce evaporative heat loss caused by saturated masonry
• Suitable for professional remedial and restoration work
• Ready to use and normally requires only one coat
• Suitable for application by brush or low-pressure spray

Suitable Surfaces

• Facing and common brickwork
• Sandstone and limestone
• Granite, slate and basalt
• Concrete
• Cementitious mortars
• Lime-based mortars
• Ashlar stonework

Typical Applications

• External masonry walls
• Exposed building elevations
• Chimneys and parapet walls
• Buttresses and supporting structures
• Coping stones
• Steeply raked stonework
• Remedial penetrating-damp protection
• Building-restoration projects

Surface Preparation

All receiving surfaces must be sound, completely dry and free from dust, dirt, moss, algae, salts and other contamination. Remove organic growth mechanically and clean the masonry using an appropriate masonry cleaner where required.

Inspect the masonry and pointing before application. Cracked or defective mortar joints must be repaired and allowed to dry thoroughly. Always complete a small test area before treating the entire surface to confirm compatibility, absorption and the final appearance.

The substrate must have remained completely dry for at least 24 hours before AquaDry ExtremeForce is applied.

Application

1. Confirm that the prepared masonry is clean, sound and completely dry.
2. Check that no rain is expected during application or for at least 24 hours afterwards.
3. Apply the product by brush or low-pressure spray.
4. Begin at the top of the wall and work downwards to catch and distribute runs.
5. Apply one generous coat to refusal, allowing the product to penetrate the substrate.
6. Spread or brush out runs to achieve even coverage.
7. Allow the treatment to cure fully before assessing whether another coat is required.

A second coat should only be applied if the surface remains absorbent after the first coat has cured. Do not apply unnecessary additional coats, as cured AquaDry ExtremeForce will not bond to itself.

Protect windows, glass, metalwork and other adjacent surfaces from splashes and overspray. Prevent vapour from entering occupied interiors and ensure good ventilation throughout application and curing. A residual odour may remain for approximately 24–72 hours.

Coverage

Approximate coverage is 4–6 m² per litre per coat. Actual consumption will depend on the porosity, texture and condition of the receiving masonry.

Pack Size	Approximate Coverage Per Coat
25 litres	100–150 m²

Technical Information

Property	Specification
Product type	Solvent-borne penetrating masonry water repellent
Appearance	Clear liquid
Cured finish	Invisible matt finish
Coverage	Approximately 4–6 m² per litre per coat
Recommended application	One coat applied to refusal
Application methods	Brush or low-pressure spray
Initial curing time	Approximately 3–4 hours at 20°C
Recoat time	Approximately 3–4 hours at 20°C
Full curing time	Approximately 24 hours at 20°C
Application temperature	6°C to 35°C
Surface requirement	Completely dry
Required dry period before application	At least 24 hours
Required rain-free period after application	At least 24 hours
Pack size	25 litres
Shelf life	24 months from the date of manufacture when stored correctly
Maximum storage temperature	40°C

Important Application Conditions

• Apply only to completely dry surfaces
• Do not apply if rain is expected within 24 hours
• Do not apply outside the recommended temperature range
• Do not apply unnecessary additional coats
• Always test a small, inconspicuous area before full application
• Protect adjacent surfaces from splashes and overspray
• Ensure vapour cannot enter occupied internal areas

Storage and Safety

AquaDry ExtremeForce is flammable. Store it in its original sealed container in a cool, well-ventilated location away from heat, sparks and other sources of ignition. Do not store the product above 40°C.

Wear suitable gloves, protective clothing and eye protection during application. Appropriate respiratory protection must be worn when spraying. Ensure good ventilation during application and curing, and keep children and pets away from treated areas until the product has fully cured.

Prevent runoff from entering drains, waterways or planted areas. Always read the current product label, technical data sheet and safety data sheet before use.