InsuBend
Manufactured through a high-tech calendering process, Insubend is produced by saturating and coating a non-woven polyester carrier with SBS elastomer-modified bitumen.
Engineered for the job it protects.
Manufactured through a high-tech calendering process, Insubend is produced by saturating and coating a non-woven polyester carrier with SBS elastomer-modified bitumen. The SBS modifiers enhance the thermal, chemical, and ageing resistance of the compound, while the polyester reinforcement significantly boosts tensile strength, elongation, and tear resistance. With a cold temperature flexibility down to -15°C, Insubend performs reliably in both hot and cold climates, making it a versatile mid-range SBS solution for roofing, foundations, basements, tunnels, wet areas, and slab-on-grade applications.
Insubend is applied using the torch-on method, forming a seamless, durable waterproofing layer that adheres firmly to concrete, metal, and other prepared surfaces. Its elastomeric nature allows it to accommodate structural movement without cracking or delaminating, providing lasting protection against water ingress and moisture damage. The membrane is available with multiple upper surface finish options including slates, aluminum foil, sand, and polyethylene film, offering adaptability across diverse project specifications.
- SBS elastomeric modified bitumen for superior flexibility across a wide temperature range
- Strong polyester reinforcement for enhanced tensile strength and tear resistance
- Cold temperature flexibility down to -15°C for reliable performance in variable climates
- Suitable for roofing, foundations, basements, tunnels, and wet areas
- Torch-on application for secure, seamless waterproofing coverage
The underside of the membrane is laminated with a thin, thermo-fusible polyethylene burn-off film to ensure efficient torch application and optimal adhesion. The membrane is available with a wide range of upper surface finishes, including multi-colored mineral slates, aluminum foil, sanded finishes, and polyethylene film.
Custom surface options and colors are available on request.
Surface Finish Flyer →Carrier: PES
| Property | Test Method | Value |
|---|---|---|
| Tensile Strength – Longitudinal | EN 12311-1 | 600 N/5cm |
| Tensile Strength – Transverse | EN 12311-1 | 400 N/5cm |
| Elongation @ Break – Longitudinal | EN 12311-1 | 35% |
| Elongation @ Break – Transverse | EN 12311-1 | 35% |
| Heat Stability (Flow Resistance) | ASTM D-5147 / EN 1110 | 110°C |
| Cold Flexibility | ASTM D-5147 / EN 1109 | -12 to -15°C |
*Insutech reserves the right to modify product specifications, descriptions, and technical information at any time without prior notice.
Application, Step by Step.
Clean the substrate of dust, debris and standing water, then repair any cracks or voids so the membrane can bond to a sound, even surface.
Apply a bituminous primer evenly across the whole surface and allow it to dry completely before any membrane work begins on the area.
Unroll and align the membrane on the primed surface, allowing the specified side and end overlaps before any bonding takes place.
Heat the burn-off film with a propane torch while progressively unrolling, pressing the membrane firmly onto the prepared substrate.
Torch and seal every overlap with a rounded trowel, checking each joint to achieve continuous, fully watertight seams across the surface.
Finish upstands, drains and penetrations with reinforcing details, then protect the membrane before backfilling, screeding or tiling.
