What is the main difference between HydraProof™ PE and PP films?
Unlike our breathable series, the HydraProof™ range is engineered for absolute liquid and vapor isolation. Choosing between Polyethylene (PE) and Polypropylene (PP) depends entirely on the mechanical stress and thermal environment of your application.
HydraProof™ PE
Focuses on high elongation and sealability. It is incredibly flexible, allowing it to conform to irregular surfaces without tearing.
- Excellent stretch and recovery
- Superior moisture sealing
- Softer hand-feel for laminates
Best for: Construction membranes, isolation liners, and flexible industrial packaging.
HydraProof™ PP
Prioritizes structural integrity and heat resistance. It is stiffer than PE and maintains its shape under high mechanical load.
- High tensile strength
- Outstanding heat resistance
- Superior dimensional stability
Best for: Heavy-duty structural applications, automated heat-sealing lines, and chemical-resistant barriers.
The Kae Hwa Standard (±0.01 mm)
Regardless of the polymer choice, both films are produced via our precision casting technology, ensuring a consistent thickness tolerance of ±0.01 mm. This level of uniformity is critical for preventing weak spots in large-scale construction or industrial isolation projects.