Toptank Tanking Slurry - 25kg - Biokil Crown

BBA‑Approved Two‑Part Cementitious Waterproofing for Internal Walls & Floors

Biokil Crown Toptank Tanking Slurry is a BBA-approved, two-component cementitious membrane system for internal masonry and concrete waterproofing. Ideal for tanking basements, cellars, lift pits, retaining walls and internal foundations, this system can be brush-, trowel- or spray-applied and delivers high-performance resistance to both positive and negative water pressure. It forms a dense waterproof barrier while remaining vapour permeable—ensuring long-term protection and building compliance.

Key Features & Benefits

• BBA-Certified Performance: Trusted for waterproofing quality and compliance in UK standards.
• Dual Water Pressure Resistance: Suitable for positive (hydrostatic from outside) and negative (internal) pressure.
• Two-Part System: Includes powder and liquid component for consistent, bonded application.
• Excellent Adhesion: Bonds directly to masonry, concrete, blockwork—no primer needed.
• Water Vapour Permeable: Allows moisture escape to prevent damp build-up behind coating.

Product Details

• Pack Size: 25 kg tub (powder mixed with liquid on-site)
• Coverage: Approximately 8 m² per 25 kg pack (depending on surface porosity and coat thickness)
• Colour: Grey
• Application Methods: Brush, trowel, or spray
• Certification: BBA-approved under certificate 17/5444

Application Instructions

• Ensure substrate is clean, stable, and free from oils, dust, laitance; pre-wet before application.
• Mix powder into the liquid gradually while stirring until a smooth, lump-free slurry is achieved.
• Apply first coat evenly using a stiff brush or trowel.
• Wait 6–8 hours (subject to ambient conditions), then apply a perpendicular second coat.
• Protect from frost and rapid drying; allow 24–48 hours curing before backfilling or overcoating.

Limitations

• Do not apply below 5 °C or to frozen/saturated surfaces.
• Not intended for final floor finish—must be overcoated or covered.
• Not suitable for active standing water without drainage provision.

Health & Safety

• Wear suitable gloves, dust mask, eye protection during mixing and application.
• Avoid skin or eye contact; rinse thoroughly if contact occurs and seek medical advice if needed.
• Consult the Safety Data Sheet (SDS) provided with each delivery.