HDPE Polymer Self-Adhesive Pre-Applied Waterproof Membrane is a high-performance non-bituminous waterproofing system specially designed for underground engineering and pre-applied waterproofing applications. It adopts a three-layer composite structure consisting of a high-density polyethylene (HDPE) waterproof layer, high-strength polymer adhesive layer, and protective sand surface layer.
During installation, the membrane is laid with the sand-coated surface facing upward and directly bonded with subsequently poured concrete. Through physical anchoring and chemical bonding, the adhesive layer forms a permanent bond with the concrete structure, creating an integrated waterproof system that effectively prevents water migration between the membrane and the structure.
Unlike traditional waterproof membranes, this product does not require hot melting, open flame, or protective concrete layers. The high-strength HDPE substrate provides excellent puncture resistance, chemical resistance, and durability, making it suitable for demanding underground environments including basements, tunnels, subway structures, and municipal infrastructure.
With its pre-applied reverse bonding technology, seamless waterproof performance, and long-term durability, HDPE self-adhesive membrane provides a reliable solution for high-standard underground waterproofing projects.
Key Features & Benefits
When underground waterproofing systems face challenges from structural movement, water migration, and construction damage, QINGYUAN HDPE Pre-Applied Waterproof Membrane provides a reliable solution with permanent bonding and long-lasting protection.
Permanent bonding with concrete eliminates water migration and prevents leakage between the membrane and structure.
High-strength HDPE substrate provides excellent resistance to puncture, impact, and mechanical damage during construction.
Pre-applied reverse bonding technology creates a strong connection between the membrane and concrete structure.
Can be installed on damp substrates without requiring completely dry surfaces, improving construction efficiency in challenging conditions.
No protective layer required after installation, reducing material consumption, labor costs, and construction time.
Excellent resistance to acids, alkalis, chloride ions, and microorganisms ensures long-term underground durability.
Non-asphalt and solvent-free material provides safe, environmentally friendly installation without harmful emissions.
Dual sealing system with self-adhesive side laps and cover strips ensures reliable waterproof performance at joints.
Self-healing adhesive layer helps seal minor scratches and provides additional protection during construction.
Our Product Specifications
- Product structure: HDPE waterproof layer + polymer adhesive layer + protective sand surface layer.
- Standard thickness: 1.2mm / 1.5mm.
- Tensile strength: ≥16MPa.
- Tensile force: ≥600N/50mm.
- Elongation at break: ≥400%.
- Puncture resistance: ≥350N, providing excellent construction damage resistance.
- Waterproof performance: 0.3MPa water pressure for 120 minutes without leakage.
- Peel strength with concrete: ≥1.5N/mm, ensuring permanent bonding with concrete structures.
You get more than waterproofing — you get long-term protection, structural stability, and worry-free performance in every climate.
Standard Construction Process
Professional pre-applied installation methods ensure permanent bonding, reliable waterproof protection, and long-term performance for underground structures.
Base Surface Preparation
Clean the concrete substrate by removing debris, sharp objects, and loose materials. Repair uneven areas and ensure the surface is suitable for membrane installation.
Membrane Pre-Laying Installation
Place the membrane with the sand-coated adhesive layer facing upward and the HDPE layer contacting the substrate. Lay the membrane flat to release internal stress.
Long-Side Lap Sealing
Remove the release film from the pre-formed adhesive overlap and press the joints firmly with a roller to achieve a continuous waterproof seal.
Short-Side Joint Treatment
Install dedicated cover strips over short-side joints and apply pressure or hot-air assistance to ensure complete sealing performance.
Detail Reinforcement Treatment
Strengthen critical areas such as construction joints, pipe penetrations, corners, and drainage pits with additional waterproof layers.
Concrete Pouring & Final Inspection
After membrane inspection, install reinforcement bars and pour structural concrete directly. The adhesive layer bonds permanently with the concrete to form an integrated waterproof system.
Our Guarantee
As a trusted waterproofing material manufacturer, QINGYUAN Waterproof focuses on product innovation, precise manufacturing, and strict quality management. We ensure every roll is produced according to standard specifications, providing consistent quality, reliable performance, and dependable solutions for global construction projects.
1. Raw Material Assurance
We use high-grade bitumen and SBS elastomer to ensure stable modification performance and consistent product quality.
2. Manufacturing Quality Control
Every roll is produced under standardized manufacturing processes with strict control of thickness, weight, and surface uniformity.
3. Performance Compliance Assurance
All products are tested according to GB 18242-2008 standard, ensuring key performance such as tensile strength, flexibility, and waterproofing meet requirements.
4. Factory Consistency Assurance
We ensure stable batch-to-batch production consistency to support reliable large-scale engineering supply.
Our Installation Projects
