4mm Polyester Reinforced Sand Pre-laid Anti-adhesive Membrane

4mm Sand‑surfaced Pre‑laid Self‑adhesive Waterproof Membrane

Product Introduction

4mm Sand‑surfaced Pre‑laid Self‑adhesive Waterproof Membrane complies with. It adopts polyester mat as reinforcement layer and SBS polymer‑modified bitumen as adhesive compound. The top surface is fine sand protective layer, and the bottom surface is peel‑off release liner. It applies pre‑laid anti‑adhesion method: lay membrane first, then pour cast‑in‑situ concrete. The sand surface forms mechanical interlock with poured concrete and bonds firmly with structural concrete. Cold installation without open flame, mainly for underground slab waterproofing. Not for exposed application.

Technical Specifications

Product Features

1. Pre‑laid anti‑adhesion, sand layer interlocks with post‑cast concrete for full bonding, effectively preventing inter‑layer water channeling.
2. Polyester mat reinforcement delivers high tensile strength and puncture resistance against mechanical damage during steel bar installation.
3. Cold‑applied construction, no open‑flame torching, eliminating fire hazard on site.
4. Low substrate requirement, installable on damp base. No additional cement‑mortar protective layer required, shortening construction period.
5. Excellent self‑healing property, minor punctures can be self‑sealed with good nail‑rod water tightness.
6. Stable high‑low temperature performance, heat‑resistant without flowing, good low‑temperature flexibility for complex underground conditions.
7. Reliable self‑adhesive lap sealing, good joint integrity for consistent service life of waterproof system.

Application Scope

1. Pre‑laid anti‑adhesive waterproofing for underground garage and basement slabs of various buildings.
2. Waterproofing for slabs of open‑cut metro, utility tunnel and tunnel projects.
3. Underground slab waterproofing for civil air‑defense works.
4. Waterproofing for base slabs of pools, pump stations and other underground structures.
5. Large‑scale underground projects where open‑flame operation is forbidden.

Note: Designed for underground pre‑laid anti‑adhesion only, not for exposed roof usage.