Polymer Film Base Type H Self Adhesive Waterproofing Membrane Wet Laid Waterproof Membrane

Polymer‑film Base Type H Wet‑laid Waterproof Membrane

Product Introduction

Type H Wet‑laid Reactive‑bonding Waterproof Membrane complies with GB/T 35467‑2017. It adopts high‑strength polymer film as core layer, coated with reactive modified‑bitumen self‑adhesive glue on both sides and protected by silicone‑coated release film. It is a cold‑applied reactive‑bonding waterproof sheet. Dual bonding mechanism of physical mortise‑lock effect and cement‑gel chemical reaction enables firm bonding with concrete substrate via cement paste or mortar. Double‑sided type supports pre‑applied installation and bonds with post‑cast concrete, integrating waterproof layer with structure to prevent water‑channeling. Torch‑free construction allows installation on damp substrate. It can be used independently or form composite waterproof system with non‑curing rubber‑bitumen coating for non‑exposed underground projects.

Technical Indexes

Product Features

1. Reactive bonding to avoid water‑channeling risk Chemical cross‑linking and physical mortise‑lock effect create tight integration between membrane and structure. Even under local damage, underground water cannot flow freely beneath the membrane, making leakage points easy to locate and repair.
2. High‑strength polymer core for good mechanical performance As high‑strength grade H‑type, it delivers excellent tensile and tear resistance, resisting puncture from steel bars and gravel during construction.
3. Cold‑applied torch‑free construction for high site safety Multiple cold‑working methods including wet‑laid, dry‑laid and pre‑applied. No hot‑melt torch required, eliminating fire hazard, ideal for confined and fire‑prohibited working zones.
4. Good adaptability for damp substrate Workable on damp base without standing water. Complete substrate drying is not required, shortening construction cycle for complicated underground site conditions.
5. Creep self‑healing performance Self‑adhesive glue features creep property to seal tiny punctures and micro‑cracks. It compensates defects of rigid concrete waterproofing and realizes rigid‑flexible combined protection.
6. Good dimensional stability & temperature resistance Resist blistering, edge curling and shrinkage under heat. Good low‑temperature flexibility accommodates thermal expansion‑contraction and foundation settlement.
7. Reliable laps and durable buried‑service performance Self‑adhesive laps provide high bonding strength. Resist soil corrosion and salt‑containing underground water for long‑term buried service.
8. Good material compatibility Compatible with bitumen‑based waterproof coatings and other membranes, easy to realize high‑grade composite waterproof assembly.

Application Scope

1. Basement slabs, raft foundations and bearing platforms for pre‑applied waterproofing on cushion layer.
2. Underground garage roof slabs and basement exterior walls.
3. Municipal underground structures such as subways, utility tunnels, civil‑defense projects and tunnels.
4. Non‑exposed sections of water tanks and fire‑water pools.
5. Non‑exposed roofs and indoor damp‑area waterproofing.
6. Renovation projects and confined‑space works where open‑fire operation is forbidden.