Product Center Waterproof Membrane

Pre-applied HDPE Self-Adhesive Membrane Waterproofing (Non-Bitumen)

This product is a composite waterproofing membrane made of high-performance polymer sheet (HDPE), a self-adhesive film layer, and a special surface anti-adhesion protective layer. The self-adhesive layer chemically crosslinks with cast-in-place concrete slurry, forming a strong permanent bond and achieving a “skin-like” waterproof effect.

Product Features

Pre-laid self-adhesive: Can be installed before casting concrete; bonds with cast-in-place concrete to prevent water leakage, ensuring high waterproof reliability.
Self-healing: Can self-repair minor scratches during installation, maintaining sealing integrity.
Excellent physical properties: High strength, puncture resistance, chemical corrosion resistance, providing long-lasting protection.
Environmentally safe: Non-bitumen based, solvent-free, odorless, environmentally friendly, safer for construction.
Easy installation: Cold application, no open flame or heat required, low substrate requirements, saves construction time.

Standards

Complies with GB/T 23457-2017 “Pre-laid Waterproof Membrane,” P-type (polymer-based) performance indicators.

Application Scope

Mainly used for floors and side walls in underground projects (e.g., basements, subways, tunnels). Especially suitable for damp substrates, complex environments, and projects with high environmental requirements.

Construction Process

Substrate preparation: Ensure the substrate is solid, level, and free of obvious water accumulation.
Membrane laying: Place the self-adhesive layer facing the structural substrate, align overlapping edges.
Overlap treatment: Remove the isolation film on overlap edges to achieve self-adhesive bonding; press with a roller.
Concrete pouring: Directly tie reinforcement and pour concrete; bond occurs via chemical reaction between cement slurry and self-adhesive layer.

Product Specifications

Item	Specification
Width (m)	1 m, 2 m
Length (m)	20 m
Thickness (mm)	1.2, 1.5, 1.7
Coverage per roll (m²)	20, 40
Overlap edge	Self-adhesive
Model	Pre-laid type

Transport and Storage

Avoid heavy pressure, collisions, and sun/rain exposure during transport. Store in dry, ventilated indoor space, away from high temperature, humidity, and fire sources. Maximum stacking height: four layers.

Precautions

For prolonged exposure to sunlight after laying, use temporary covering to prevent membrane bulging.
Place protective blocks when tying reinforcement to avoid puncturing the membrane.
Avoid dust or debris contamination on the self-adhesive layer after removing isolation film.
In low temperatures, ensure the adhesive layer remains effective; auxiliary heating may be used if necessary.

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