Proofex Torchseal A300
Polyester fabric backed base sheet, for heat sensitive substrates in multi-layer torch-on membrane systems
Replaces Index Rollbase PV
Proofex Torchseal A300 is manufactured by co-extrusion of a polymer - bitumen compound and a non-woven polyester reinforcement.
This non-woven polyester constitutes the lower face of the membrane which can be used to adhere the membrane to substrates or mechnically fixed.
The polyester fabric creates a micro air- space betweenthe membrane and the substrate through which vapour may easily escape.
Proofex Torchseal A300 is designed for use as a base sheet over timber or thermal insulation and may also be applied over old failed membranes.
Proofex Torchseal A300 is particularly suited as a base sheet for heat sensitive substrates in multi-layer torch applied bitumen membrane systems.
Proofex Torchseal A300 may be attached to the substrate by a number of methods dependant upon the type of surface:
- Mechanically fastened
- Fully or part adhered with an appropriate general purpose contact adhesive
- Hot asphalt roll & pour method
- Uniform thickness factory controlled in manufacture
- Excellent cold flexibility -10°C
- The polyester fabric creates a micro air- space between the membrane and the substrate through which vapour may easily escape
- Manufactured with a selvage edge for overlapping purpose providing a continuous waterproofing barrier against water ingress
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