VB4 Expal Vapour Barrier

Thermoplan FPO System

4mm thick, robust, torch-applied, elastomeric bitumen vapour barrier, featuring a tear resistant aluminium foil lining for vapour impermeability.

Technical data
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Roll size (m) 1 x 7.5
Weight (Kg/m²) 4.8
Thickness (mm) 4
Surface finish Top: Mica
Bottom: Thermofusible polyethylene
Reinforcement 200g/m2 woven glass
Tensile strength (EN 12311-1) Length ≥ 1200N/50mm
Diagonal ≥ 1200N/50mm
Elongation at break (EN 12311-1) Length ≥ 2%
Diagonal ≥ 2%
Heat stability °C (EN 1110) +110
Cold bending  °C (EN 1109) -30