Tunnel Waterproofing HDPE Membrane(DYP-819) is a widely used waterproof membrane that using ethylene, vinyl acetate co-polymer/polyethylene as main material, mixing in other modification additives. Its anti-aging and high durability make it specially adaptable for tunnel waterproofing engineering.
2. Product advantages & standard
High tensile strength
High elongation and resistance to cracking or rupture.
low cold-bending rate;
Rarely affected by environment temperature changes.
Convenient construction, soft and flexible property to well bond with the substrate surface.
Anti-mildew and acid & alkali corrosion,
Specially suitable for hot gas welding , seamless and tightly bond after welding,
No volatile solvent, no toxic gases, no pollution to the environment.
Executive standard: GB18173.12012 Polymeric Waterproof Materials Section I: Sheet
Tensile strength /Mpa
Elongation at break /%
Tear Strength/（kN/m） ≥
0.3Mpa, no leakage
-35℃, no crack
Heat-treatment size change /mm
Lap-joint peeling strength
Standard /N/mm ≥
Retention rate after water soaking (23℃*168h) /% ≥
3. Product Specification
Length: 20-30m or customized.
Tunnel, metro or other underground waterproofing engineering;
River,Lack ,pond and tank liner waterproofing;
Swimming pool, drinking pool, or reservoir waterproofing;
chemical plant, oil refinery, gas storage tank, chemical reaction pool lining,
Building roofing waterproofing;
5.Packing & Storage
Keep the packaging complete and without damage, store product in ventilated, dry place,
stack height should not exceed 5 roll layers.
Avoid direct sunlight, acid, alkali, oil & organic solvent contact, and be away from heat source.
Storage period is one year under normal storage & transportation condition