Sealrite WSM 80mm X 20m Self-Adhesive Waterproofing Membrane

Sealrite WSM Self-Adhesive Waterproofing Sheet Membrane

Sealrite WSM is a Class II self-adhesive sheet membrane with a high-tack butyl adhesive backing for waterproofing, crack bridging, and vibration reduction. It installs quickly with no drying time on a wide range of substrates, delivering an instant waterproof seal with no curing wait. An excellent vapour barrier, it adheres readily to textured and low-energy surfaces and can be cut to width for tailored installation.

Its durable non-woven construction and butyl rubber adhesive make it ideal for bathrooms, wet rooms, balconies, and subfloors, as well as sealing sill, hobb, jamb, and transition details in residential and commercial construction. Suitable for both internal and external applications, Sealrite WSM offers outstanding resistance to vibration, movement, and temperature extremes for reliable performance in demanding environments.

Key Features

• No drying time – instant adhesion
• High-tack butyl adhesive backing
• Excellent vapour barrier and water resistance
• Crack-bridging and vibration-dampening properties
• Adheres to textured and low-energy surfaces
• Easy to cut to width for tailored installation
• Durable non-woven construction
• Self-adhesive – no hot works required
• Ideal for bathrooms, wet rooms, balconies, and subfloors

Ideal Applications

• Wall and floor waterproofing systems
• Window and door sill waterproofing
• Hobb and jamb detailing
• Waterproof joints, junctions, and penetrations
• Flashing and transition detailing
• Remedial waterproofing applications

Compatible Substrates

• Concrete and screeds
• Timber sheeting
• Galvanised steel, Zincalume, copper, and aluminium
• Glazed surfaces, marble, granite, and ceramics
• Existing coated and painted surfaces
• Lightweight structural flooring systems

Technical Specifications

• Membrane type: Class II self-adhesive sheet membrane with high-tack butyl adhesive backing
• Gauge: 0.75mm
• Tensile strength: 51 N/cm
• Adhesion to steel: 7.8 N/cm
• Vapour transmission: 0.36 g/m²/24 hrs
• Temperature range: 10°C to 100°C
• Roll length: 20m
• Shelf life: 12 months

Certifications & Ratings

• AS 4654.1:2012 Class II
• AS 4858:2004 Class II
• ISO 9001

Sustainability & Eco Notes

• Solvent-free and non-toxic
• No VOC emissions during installation
• Safe for indoor use in residential and commercial environments
• Shelf life: 12 months