HDPE Pre‑Applied Waterproofing System

Pre‑applied HDPE sheets with adhesive bonding and sealed overlaps

High‑density polyethylene membranes designed for below‑ground waterproofing, combining strong adhesive bonding to concrete, high puncture resistance, and sealed joints via heat‑welded selvage or bonding tape.

Elongation >400–500%

Hydrostatic head up to 60–71 m

No cracks at −25°C

Chemical resistant to soils

Below‑Ground Waterproofing Needs Bonded, Sealed Protection

Basements, subways, tunnels and underground structures require waterproofing that resists puncture, settlement movement, and water pressure while preventing water tracking behind the membrane.
Pre‑applied HDPE systems are built to bond with poured concrete and seal laps, helping maintain a continuous barrier to water, moisture and gas.

How Pre‑Applied HDPE Membranes Are Installed

Substrates are made smooth and stable, with voids/potholes repaired using polymer‑modified mortar; protrusions and contaminants are removed.
Sheets are laid film‑side down with release liner facing the concrete pour; overlaps are aligned to marked selvedge and bonded by removing the release liner and rolling firmly.
For heat‑weld systems, the selvage overlap is cleaned and fused using a hot‑wedge welder (temperature 560–700°F; speed 0.8–2 m/min), optimized for site conditions.
Bonding tape is used for terminations, corners, cut edges and repairs; corners are returned at least 100 mm and sealed with tape.