Liquid applied membrane systems provide a seamless waterproofing solution for flat roofs, metal roofs, balconies and refurbishment projects. These systems form a fully bonded, elastomeric waterproof membrane that conforms to the shape of the substrate, making them particularly suitable for roofs with complex detailing, penetrations and irregular surfaces. Sika's liquid applied roofing systems can be used on a variety of substrates, including concrete, asphalt and bituminous roofing, offering a versatile solution for both new build and roof refurbishment projects. With cold-applied installation methods, crack-bridging properties and excellent adhesion, liquid applied membranes provide durable waterproofing without the need for heat or flames.
Advantages of Sika Liquid Applied Membrane Systems
- Cold-applied installation with no heat or open flames required
- Seamless waterproofing membrane with no joints or laps
- Fully bonded to the substrate to create a continuous waterproofing layer
- Suitable for complex roof details, penetrations and irregular roof layouts
- Can be applied to a variety of substrates, including concrete, asphalt and bitumen
- Ideal for roof refurbishment projects
- Crack-bridging properties help accommodate substrate movement
- Fast and efficient application
- Vapour permeable systems available to help manage trapped moisture
- High UV resistance for exposed roofing applications
- Available in a range of colours, including highly reflective white options for cool roof and solar roof applications
- Suitable for flat roofs, metal roofs, balconies and other waterproofing applications
Why Choose Liquid Applied Waterproofing?
Liquid applied membranes are often specified where traditional sheet membranes may be difficult to install due to roof geometry, detailing requirements or access restrictions. Their seamless application allows the membrane to conform to complex roof shapes while creating a continuous waterproofing layer. This makes liquid applied roofing systems a practical solution for both new construction and refurbishment projects where reliable waterproofing and installation flexibility are important considerations.
Sika liquid applied membrane systems are suitable for a wide range of waterproofing applications, including:
- Flat roofs
- Metal roofs
- Roof refurbishment projects
- Balconies and terraces
- Gutters and drainage channels
- Podium decks
- Complex roof details and penetrations
- Cool roofs
- Solar roofs
Liquid Applied Roofing Membranes & Accessories
Compatible Substrates for Liquid Applied Waterproofing
Bitumen
Metal panel sheet
Concrete
Single ply membranes
Masonry
Copper
Fibre asbestos cement
FAQ
Liquid applied roofing membranes are used on flat and low-slope roofs in both new build and refurbishment projects. Liquid applied membranes are especially suitable for roofs with complicated details, upstands, penetrations or limited access.
Sika offers a range of liquid applied roofing systems including polymethyl methacrylate (PMMA) and polyurethane (PU) membranes.
Liquid membranes provide seamless coverage, excellent adhesion to a variety of substrates and ease of installation around complex details. They are also ideal for cold applied, flame-free applications, reducing fire risk on site.
Yes. Sika’s liquid applied membrane systems are suitable for roof refurbishment projects.
Polyurethane (PU) and polymethyl methacrylate (PMMA) membranes are both liquid-applied waterproofing systems, but they have key differences. PU membranes typically cure more slowly and offer excellent flexibility, making them ideal for roofs with complex details and movement. PMMA membranes cure much faster and are suited for projects with tight timeframes or low temperature application requirements. The choice between the two depends on site conditions, performance needs and installation timelines.
