Achieve a permanent, elastic seal around pipes and penetrations, guarding against water ingress. Elastoproof Base Collars ensure these critical junction points move with the building, not against the waterproofing system.

Why this product exists

Penetrations such as pipes, drainage outlets, and cabling are inherent vulnerabilities in any waterproofing system. Movement, vibration, and thermal expansion constantly challenge these interfaces, often leading to membrane compromise. Unlike traditional site-applied caulkable sealants that often suffer from adhesion issues and ultimately fail under movement, Elastoproof Collars are prefabricated flange seals. They ensure a seamless, elastic, and durable seal with 100% elastic recovery, specifically designed for robust pipe and penetration detailing within Gripset waterproofing systems.

The numbers that matter

The primary performance metric for Elastoproof Base Collars is their 100% elastic recovery. This means the collar will consistently return to its original shape after being stretched or compressed by movement. This critical flexibility ensures the seal remains intact, accommodating thermal expansion, structural shifts, and vibration without compromising the membrane. The collars are available in three sizes to suit pipe diameters: Small (up to 50mm), Medium (up to 110mm), and Large (up to 150mm). This range covers most common pipework, ensuring a precise, tight fit at the penetration.

What it's like to use

The application process centres on a precise fit and full integration with the membrane. Collars arrive pre-sized, ready for custom trimming to the exact penetration diameter. A cut of 75% of the pipe's diameter ensures a tight, resilient seal around the fitting. Once prepared, the collar beds into a liberal coat of wet Gripset membrane applied to a prepared and primed surface.

It is crucial to fully embed the collar and ensure the fabric edges are saturated, removing any air pockets. A second membrane coat then encapsulates the collar, creating a continuous, durable waterproof layer. The effectiveness of the seal depends entirely on embedding the collar into a wet membrane film; never allow the membrane to skin or dry before bedding the collar.

Where this product excels

  • Pool decks and swimming areas demand uncompromising waterproofing. These collars provide the vital elastic seal around pool plumbing and drainage outlets, preventing water ingress at these critical points.
  • For retaining walls, lift pits, and other civil structures below ground, these collars seal penetrations against hydrostatic pressure and ground movement, maintaining structural integrity.
  • Balconies and podiums also benefit, safeguarding common pipework and balustrade post penetrations against leaks in exposed conditions.
  • In standard wet areas such as showers, laundries, and planter boxes, the collars secure all pipe and drainage connections to prevent water damage.

How it fits in a real system

These collars are integrated directly into the waterproofing membrane system. After the surface is prepared with a suitable primer, such as Gripset 11Y Slurry Primer, the collar is embedded into the wet liquid membrane. This forms a seamless, elastic junction, which is then fully encapsulated by a second membrane coat. The system is then ready for the final finishes, such as a membrane-safe tile adhesive like Gripset C-Lite in tiled pool applications.

Choose this when

  • When creating a permanent, elastic seal around pipes, drainage outlets, or other circular penetrations.
  • When waterproofing areas that require robust detailing at junctions, especially those subject to movement, vibration, or cracking.
  • When integrating penetrations into any Gripset liquid membrane waterproofing system.
  • For high-risk applications like pool shells, balconies, wet areas, or planter boxes where penetration integrity is critical.

Don't use this when

  • Not for: direct application with solvent-based materials, adhesives, or sealants. This can compromise the collar's integrity and the overall waterproofing system.
  • Not for: use as a standalone waterproofing solution. It is designed to be fully integrated into a continuous Gripset liquid membrane system.
  • Not for: applications where the penetration diameter exceeds 150mm.

Complementing your waterproofing system

The Elastoproof family includes other preformed elements designed for specific detailing challenges. While Elastoproof Base Collars are purpose-built to create permanent, elastic seals around circular penetrations like pipes and drains, other products like the Elastoproof BRW-PF Prefabricated Corners handle internal and external corners, ensuring seamless transitions in the waterproofing layer without relying on tape or caulk. Each product is engineered to address distinct high-risk geometries, working together for complete system integrity.