Sealrite WSM Sill & Hobb Membrane

Sealrite WSM Sill & Hobb Membrane is a premium self-adhesive waterproofing membrane engineered for sealing sill, hobb, jamb, and transition details in residential and commercial construction. Featuring a high-performance butyl rubber adhesive backing, it delivers exceptional waterproof protection, flexibility, and long-term durability across a wide range of substrates and waterproofing systems.

Designed for both internal and external applications, the membrane provides instant waterproof sealing with no drying time required, making installation fast, clean, and efficient. Its outstanding resistance to vibration, movement, and temperature extremes ensures reliable performance in demanding environments.

Key Features

• Self-adhesive membrane — no hot works required
• Instant waterproof seal with no curing time
• Excellent flexibility and vibration resistance
• High-performance butyl waterproofing layer
• Suitable for internal and external use
• Service temperature range from -30°C to +80°C
• Solvent-free and non-toxic formulation
• Can be cut to custom widths on site
• Backed by a 20-Year Product Guarantee

Ideal Applications

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

Compatible Substrates

Suitable for use over:

• 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

Sealrite WSM Sill & Hobb Membrane exceeds AS 4654.1:2012 and AS 4858:2004 Class II waterproofing requirements, making it a trusted solution for professional waterproofing and tiling systems.