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Watco Liquid Roof Membrane Anti Slip

Reinforced anti slip waterproof protection for flat roofs

  • Ultra-tough, UV resistant membrane
  • Fibre-reinforced for extra protection and durability
  • Highly flexible – won’t split with roof movement
  • Excellent slip resistance even in the wet

Frequently bought together


A cold applied, tough liquid membrane to seal roofs with the added benefit of a coarse, slip resistant surface. Apply a basecoat of Watco Liquid Roof Membrane, followed by a topcoat of Anti Slip Liquid Roof Membrane. Sprinkle the grit supplied with the Anti Slip Liquid Roof Membrane onto the second coat before it cures to give a hard-wearing, coarse, slip resistant surface.


  • Ideal for safer maintenance work or emergency access in all weather conditions flexible seal
  • Extremely flexible to withstand the natural expansion and contraction of the roof structure
  • Tough aluminium oxide grit for a hard-wearing, coarse slip resistant surface
  • No compromise to the sealing properties of the membrane
  • Ideal for roofs where water tends to pool or where algae grows
Suitable for Flat and pitched roofs. Concrete, asphalt, roofing felt.
Finish Low sheen with textured anti slip finish.
Interior or Exterior Exterior.
Coverage 5-7m² per 5L per coat and 12-18m² per 12.5L per coat.
Number of coats 2
Curing time Touch dry within 4 hours, hard dry within 16 hours at 20°C.

Surface preparation

Inspect entire surface to assess soundness of existing substrates or coatings. Where necessary prepare test areas. Repairs to cracks, holes, blisters etc, should be carried out before application of the coating. Ensure roof surface is clean, dry and free from all loose debris and roof contaminants. All fungal growth, moss etc. should be treated with a suitable fungicidal cleaner. General dirt and contamination can be removed with Watco Bio D, a biodegradable solvent free degreaser.

Please note: Watco Liquid Roof Membrane is moisture activated, therefore once opened, all material must be used immediately. The tin cannot be re-sealed.


If appearance is critical we recommend the application of a small trial area first.

Do not apply if rain is forecast within 12 hours. Stir contents thoroughly (do not thin). Apply Watco Liquid Roof Membrane by brush or short/medium pile type roller. Work material well into substrate. Apply generous amounts to areas at a higher risk of water ingress i.e. joints and protrusions with a brush prior to the application of the main coating. Two coats are recommended. The second coat should be applied after a minimum of 8 hours and a maximum of 7 days. An anti slip finish can be achieved by sprinkling the coarse white grit over the second coat while it is still wet.

Data sheets

Safety data sheets

Safety Data Sheet

Technical data sheets

Technical Data Sheet

£110.70 (Ex VAT)

In stock

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Tools and accessories

12" Roller Frame & Handle

12" Roller Frame & Handle

A sturdy roller applying floor coatings

From £7.70  (Ex VAT)

Watco Fibreglass Reinforcing Tape

Watco Fibreglass Reinforcing Tape

Strengthens and waterproofs joints and cracks in bund areas

£31.50  (Ex VAT)

Paint Brush

Paint Brush

Professional paint brushes suitable for all coatings

From £2.20  (Ex VAT)

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Help & Advice

Contact our friendly and professional Technical Advisors for expert help and advice for your project. You can give us a call on 01483 418 418 or email

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