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Description
The WonderBuilds 2.5kg T -20c SBS Sanded Underlay is a high-performance waterproofing membrane designed for use as part of a multi-layer roofing system. Boasting high-quality glass fibre reinforcement, this underlay is strong & durable and is suited to use in new builds or refurbishments alike.
Easily applied using torch on methods, this SBS modified bitumen coated underlay can be applied to a wide range of substrates. An environmentally friendly option that doesn’t compromise on performance, the WonderBuilds 2.5kg T -20c SBS Sanded Underlay is a reliable and cost-effective waterproofing solution you can trust.
Why Choose this WonderBuilds 2.5kg T -20c SBS Sanded Underlay 16m x 1m?
- High-performance underlay solution
- Glass fibre reinforcement
- Quick & easy installation
- Strong & durable
- Cost-effective
Product Specifications:
Roll Dimensions: 16m x 1m
Straightness: Pass
Weight (kg/m²): 2.5
Visible Defects: None
Watertightness Method A & B: Pass
Reaction to Fire: Class E
Resistance to Tearing (N): 60 (LD) / 90 (TD)
Tensile Strength (N/50mm): 400 (LD) / 170 (TD)
Elongation (%): 2 (LD) / 2 (TD)
Cold Flexibility (°C): -20
Peel Resistance (N/50mm): 20
Resistance to Impact (mm): 500
Durability of Watertightness Against Artificial Ageing: Pass
Durability of Watertightness Against Chemicals: Pass
Flow Resistance at Elevated Temperature (°C): 100
Shear Resistance: 350
Result after aging / Flexibility at Low Temperature (°C): -20
Result after aging / Flow Resistance at Elevated Temperature (°C): 100
Dangerous Materials: None
