15/07/2026
Sikaplan® WP 1100-15 HL is a high-performance synthetic waterproofing membrane manufactured from PVC-P (plasticized polyvinyl chloride). It features a non-reinforced structure with a signal layer and is designed for foundation and tunnel waterproofing applications exposed to underground water pressure.
With its 1.50 mm thickness, the membrane provides reliable protection against groundwater pressure while offering long-term performance in demanding underground environments.
Developed by Sika, a global manufacturer of construction chemical solutions, Sikaplan® WP 1100-15 HL is a trusted waterproofing solution for projects requiring durability, mechanical strength, and resistance against aggressive soil conditions.
Thanks to its signal layer technology, possible damages can be detected quickly, providing significant advantages during inspection and maintenance processes.
✔ Signal Layer for Easy Damage Detection The membrane has a yellow upper surface and dark grey lower surface. If damage occurs, the lower layer becomes visible, allowing quick identification of affected areas.
✔ DEHP (DOP)-Free Plasticizer Provides an improved formulation with better environmental and health considerations.
✔ High Mechanical Strength Offers excellent resistance with:
✔ Resistance Against Underground Conditions Designed to withstand:
✔ Flexible Performance Across Wide Temperature Ranges Maintains flexibility without cracking down to -20 °C, making it suitable for cold and moderate climates.
✔ Hot Air Weldable Provides homogeneous and watertight connections at membrane joints.
✔ Suitable for Damp and Wet Surfaces Offers flexibility during installation under challenging construction conditions.
✔ Temporary UV Resistance Provides protection against sunlight exposure during the installation period.
Sikaplan® WP 1100-15 HL is used in underground waterproofing applications such as:
It is especially suitable for projects where protection against water pressure is a critical requirement.
Material: PVC-P, non-reinforced, signal layer membraneThickness: 1.50 mm (± tolerance)Unit Weight: 1.95 kg/m²
Roll Dimensions: 2.20 m × 20 m (Custom dimensions available)
Color:
Tensile Strength:
Elongation at Break: ≥300%
Low Temperature Flexibility: -20 °C
Service Temperature Range: -10 °C to +35 °C
Reaction to Fire: Class E
Impact Resistance: Watertight under a falling weight test from 450 mm
Weld Seam Shear Strength: ≥6.0 N/mm
Underground waterproofing is one of the most difficult construction elements to repair after completion. Choosing an unsuitable membrane system can result in costly future repairs and operational problems.
Sikaplan® WP 1100-15 HL provides a reliable waterproofing solution with:
With these advantages, it is an effective solution for foundations, tunnels, and underground structures requiring long-term waterproofing performance.
It is used in foundations, tunnels, underground storage structures, and reinforced concrete structures exposed to groundwater pressure.
The signal layer makes damage detection easier. When the yellow surface layer is damaged, the dark grey layer underneath becomes visible, helping locate problem areas quickly.
Yes. The membrane maintains flexibility and performance at temperatures down to -20 °C.
No. The joints are connected using hot air welding technology, creating secure and watertight connections without open flame application.
