For waterproofing pipes, drainage outlets, and cabling penetrations in high-risk areas like tiled showers, balconies, planter boxes, or water features, Elastoproof Base Collars provide a prefabricated, elastomeric flange seal. These collars prevent water ingress at the vulnerable junctions where substrate movement, vibration, and thermal expansion typically crack standard liquid membranes or tear sealants away from the penetration neck.
Why choose a preformed collar? A collar provides flexible detailing around compatible pipe and service penetrations in showers, balconies and other membrane systems. Choose it instead of attempting to cut a flat band around the pipe neck. Correct sizing, a sound substrate and complete integration with the compatible Gripset membrane are essential.
Elastoproof Base Collars replace the need for caulkable sealants, removing the risk of adhesion failure at the pipe-to-substrate boundary. Built with high tear strength and 100% elastic recovery, the central rubber section stretches tightly around the penetration while the outer fabric edges embed directly into the wet membrane. This creates a continuous, high-movement joint that isolates the pipe's physical vibration and thermal movement from the surrounding waterproofing system. The system is compatible with all Gripset membranes, adhesives, and coatings.
Install on prepared and primed surfaces around penetrations in:
To prevent joint failure, the collars must be installed correctly into the wet membrane system:
How large should the hole in the collar be?
About 75% of the penetration diameter so the rubber stretches tightly around it.
What penetration sizes do the collars cover?
The current evidence lists sizes for penetrations up to about 50mm, 110mm and 150mm.
How are the collars installed?
Embed the fabric edges into a fresh compatible Gripset liquid membrane and overcoat them as part of the waterproofing system.
Can solvent-based products be used with the collars?
No.
| Property | Value |
|---|---|
| Material | Gripset Elastoproof fabric with central elastomeric zone |
| Sizes | Small – 120 mm × 120 mm (up to 50 mm penetration) Medium – 250 mm × 250 mm (up to 110 mm penetration) Large – 300 mm × 300 mm (up to 150 mm penetration) |
| Thickness | Approx. 0.8 mm |
| Elongation | ≥ 300% |
| Tear Strength | High (fabric reinforced) |
| Service Temperature | -30 °C to 90 °C |
| Application Temperature | 5 °C to 35 °C |
| Substrate Compatibility | Concrete, fibre cement, plasterboard, masonry, timber, metals, existing waterproofing membranes (solvent-free systems) |
| Primer Requirements | Gripset GP Primer for porous/dusty surfaces; OP Primer for non-ferrous metals; consult Adheseal for existing membrane compatibility |
| Shelf Life | 12 months in original unopened packaging |
| Storage Conditions | Store in cool, dry conditions away from direct sunlight |
| Limitations | Not for use with solvent-based membranes or coatings; not to be installed over damp surfaces |
Here are some common examples on where Gripset Elastoproof Base Collars used by our customers.
