Proofex Hydromat


Proofex Hydromat is a pre or post-applied bentonite waterproofing membrane. It consists of two elements; natural sodium bentonite as the sealing material and two layers of geotextile to encapsulate and contain the bentonite. Use for basement waterproofing protection to grades 2, 3 and 4 as defined in BS 8102.

It provides a vapour and waterproof membrane in building and civil engineering structures and protection to the structure from attack by aggressive chemical substances in the ground.

Proofex Hydromat lap joints are impermeable, derived from surface bentonite impregnation of the non-woven geotextile during manufacture. Full surface contact between the bentonite-impregnated cover layer and the concrete ensures that small cracks and surface imperfections are sealed. It forms a tenacious mechanical bond to poured concrete when cast in situ, remaining in place if settlement occurs.

Fixing to vertical/ sloping surfaces:

‘Soft washer’ fasteners within joint lap areas are recommended.

Joint laps:

Minimum 150 mm laps are recommended.

General information

Uniclass 2015

Pr_25_57_65_60 Plastics sheetsPrimary


J40/285 Loose laid bentonite damp proofing/ tanking

Specification data - Plastics sheets

Product Reference

Proofex Hydromat


Third party certifications

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