Show all documents

SikaRoof® Liquid Membrane

A ready to use, polyurethane liquid waterproofing membrane for roofs

SikaRoof® Liquid Membrane is a cold-applied, one-component polyurethane waterproofing system. It forms a seamless, permanently flexible membrane that protects against water ingress. SikaRoof® Liquid Membrane becomes shower resistant in just 10 minutes and cures reliably across a wide range of weather conditions.  Suitable for flat and pitched roofs, SikaRoof® Liquid Membrane has excellent adhesion to both porous and non-porous substrates and is suitable for use on new projects, extensions or to refurbish an existing leaky roof.

  • Suitable for use with both new and old roofs.
  • Moisture curing technology – no catalyst required.
  • Fast curing – rain resistant after 10 minutes.
  • All weather product.
  • Ready to use – apply with brush or roller.
  • Forms a seamless membrane.
  • Can be reinforced with Sikalastic® Fleece-120.
  • Easily recoated, no stripping required. Provides cost effective life-cycle extension of failing roofs.
  • Vapour permeable – allows substrate to breathe.
  • Elastic – retains flexibility even at low temperatures.
Seek a stockist
Show all documents

Usage

  • Waterproofing flat and pitched roof structures.
  • Suitable for new roofs as well as the refurbishment of existing structures.
  • Suitable for use on: mortar, brick, stone, fibre cement, roof tiles, asphalt and bituminous coatings.
 

Advantages

  • Suitable for use with both new and old roofs.
  • Moisture curing technology – no catalyst required.
  • Fast curing – rain resistant after 10 minutes.
  • All weather product.
  • Ready to use – apply with brush or roller.
  • Forms a seamless membrane.
  • Can be reinforced with Sikalastic® Fleece-120.
  • Easily recoated, no stripping required. Provides cost effective life-cycle extension of failing roofs.
  • Vapour permeable – allows substrate to breathe.
  • Elastic – retains flexibility even at low temperatures.

Packaging

7 kg and 21 kg metal tins

Colour

Slate Grey

Product Details

Product Information

Shelf Life

12 months from date of manufacture in unopened containers

Storage Conditions

Store upright in original packaging. Keep in a dry, well-ventilated area at 0 °C to +25 °C. Protect from sunlight and frost. Storage temperatures above +25 °C may reduce shelf life.

Density

~1.42 kg/L

Solid content by mass

~80 %
Technical Information

Tensile Strength

Unreinforced with matting: ~4.5 N/mm2 

Reinforced with matting: ~8 N/mm2 (ISO 527-3)

External Fire Performance

Broof (t1)

Reaction to Fire

Euroclass E

Application

Application Information

Surface temperature

Substrate temperature must be between +5 °C and +60 °C. Moisture content of substrate must be ≤4 %
Application steps

SUBSTRATE PREPARATION

Ensure substrate is in good condition e.g. cracks sealed, sound joints, tiles securely fastened etc. All timbers used in roof constructions must be suitable for exterior use. Adhere to good building practices in the selection of building materials and design of roof constructions. Make sure any gaps are filled with an appropriate seal.

APPLICATION

SikaRoof® Liquid Membrane can be applied using a soft bristle brush or a solvent resistant roller. If product has settled or separated on opening, stir gently in order to achieve a uniform colour. Do not overmix as this will cause air entrainment. Generally priming is not required (see limitations); for porous or irregular surfaces apply an additional priming coat of 0.25-0.3 L/m². Ensure all surfaces are sound, clean and free from dust and loose friable material prior to application. Protect handrails etc. with tape and/or plastic wrapping prior to application. Roof coatings – At least two coats of 1 mm depth are needed. Allow for the first coat to dry before applying the second coat (6 hours at +20 °C).

Ambient Conditions Minimum Time Between Coats^
+5 °C/ 50 % r.h.Allow overnight curing
+10 °C/ 50 % r.h.12 hours
+20 °C/ 50 % r.h.6 hours
+30 °C/ 50 % r.h.4 hours

^If time between coats is longer than 4 days, clean surface and apply reactivation primer before applying second coat.

 

Documents