---
title: Proofex Torchseal A400 - Perforated Reinforced Base Sheet
canonical_url: https://fosroc.directory.norg.ai/construction-materials/waterproofing-roofing-systems/proofex-torchseal-a400-perforated-reinforced-base-sheet/
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description: Perforated reinforced base sheet to relieve water vapour pressure from under multi-layer torch-on bitumen membrane systems. Used for spot bonding torch applied bituminous membranes particularly over substrates with relatively high humidity. Cost effective, quick to install, allows homogeneous distribution of spot-bonded adhesion zone. The finish layer is more resistant to wind and more stable to temperature variations than other spot bonded methods.
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productFeedItemId: 58eb243e-9de0-4e87-beea-be4d0f7fd022
---

# Proofex Torchseal A400 - Perforated Reinforced Base Sheet

# Proofex Torchseal A400 - Perforated Reinforced Base Sheet

Perforated reinforced base sheet to relieve water vapour pressure from under multi-layer torch-on bitumen membrane systems. Used for spot bonding torch applied bituminous membranes particularly over substrates with relatively high humidity. Cost effective, quick to install, allows homogeneous distribution of spot-bonded adhesion zone. The finish layer is more resistant to wind and more stable to temperature variations than other spot bonded methods.

**Price:** Available

**Brand:** Fosroc

[View Product](https://www.fosroc.com.au/product/proofex-torchseal-a400)