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Detailing corners is a critical point in any waterproofing system. It's often where the system fails. Gripset Elastoproof Prefabricated Corners simplify this challenge. They deliver a seamless, elastic, and waterproof seal at complex 90º and 270º intersections. This eliminates the need for intricate fabric lapping and multi-layered detailing. The result is a robust, durable, and fault-free corner.
Traditional corner detailing often introduces vulnerabilities. Fabric lapping, multiple membrane layers, and bond-breaking tapes demand extreme precision. This product provides a pre-formed, flexible solution. It creates a continuous, elastic seal at 90º and 270º corner intersections. This bypasses common pitfalls of on-site fabrication. It delivers consistent performance and long-term protection against water ingress.
These corners are designed for precise fitment. They feature 200mm x 200mm dimensions with 120mm wall/floor returns. This ensures ample coverage and integration into the membrane system. The material offers 100% elastic recovery, accommodating substrate movement without compromising the seal. High strength and tear resistance ensure long-term durability in volatile areas.
Installation is straightforward. Apply a liberal coat of the chosen Gripset membrane. Embed the corner into this wet membrane film. Ensure complete wetting of the fabric edges. Use a flat spatula or brush to smooth out any creases or air pockets. Critical to successful application: the membrane must be wet. Do not allow it to skin or dry before embedding the corner. Subsequent Elastoproof Jointing Bands should overlap the Prefabricated Corner by a minimum of 40mm, adhered with the selected Gripset membrane.
This product excels in detailing critical junctions across various applications:
These Prefabricated Corners integrate directly into Gripset waterproofing systems. They are often applied early in the detailing phase. For under-screed systems, they serve as a foundational element, installed before other components like Gripset Elastoproof Base Collars Joint Sealant. In more complex systems, such as water tank interiors, they follow the priming stages. They form part of a multi-layered, reinforced build-up alongside products like Gripset 11Y Slurry Primer and Elastoproof Base Collars. This ensures the corner detail is robustly protected by subsequent membrane layers.
While the Elastoproof Jointing Band provides continuous, flexible waterproofing for linear joints, these Prefabricated Corners specifically address the complex geometry of 90º and 270º intersections. They are engineered to seamlessly integrate with the standard jointing bands and components like Elastoproof Base Collars. This ensures a cohesive and unbroken waterproofing layer across an entire structure. This dedicated pre-formed solution prevents inconsistencies that can arise from attempting to fold or miter flat jointing bands into tight, volatile corner configurations. It guarantees the system's integrity at its most vulnerable points.
Prefabricated corners ensure a seamless, elastic seal at joint intersections, directly addressing water ingress risks. They eliminate common failure points associated with lapping, bonding fabrics, or using multiple reinforcement layers at volatile corner areas.
These corners are compatible with all Gripset membranes. However, they are not compatible with solvent-based materials such as solvent-based adhesives, sealants, or coatings, which can compromise product integrity.
Embed the corner profile into a liberal, wet bed of the Gripset membrane. Ensure the fabric edges are fully saturated and all air pockets are removed. Do not allow the membrane to skin or dry before bedding the corner.
Apply these corners only when the surface temperature is between 5°C and 30°C. Application outside this range can affect adhesion and long-term performance.
| Application | Key benefit | Primary trades |
|---|---|---|
| Waterproofing internal 90° corners | Ensures a seamless elastic seal and 100% elastic recovery for long-term protection against water ingress. | Waterproofers, Tilers |
| Waterproofing external 270° corners | Provides high strength and tear resistance at critical, volatile corner intersections. | Waterproofers, Builders |
Ensure substrate is clean, dry, and structurally sound. Remove dust, debris, oils, and loose materials. Check substrate suitability and adhesion of associated products before starting.
Use a stiff brush or vacuum to remove dust. Wipe with a damp cloth if required and allow to dry fully before membrane application.
Perform a small-area adhesion test with the chosen Gripset membrane to confirm compatibility and bond strength before large-scale application.
Apply a liberal, even coat of the selected Gripset membrane to the substrate at the corner location, covering 100% of the rear profile area.
Work membrane into the substrate with a brush to achieve full wetting. Apply thick enough to maintain a wet film until the corner is embedded.
Spread evenly with a roller or notched trowel to the recommended membrane thickness, ensuring no gaps or thin spots.
Position the Elastoproof corner into the wet membrane bed. Fully wet out fabric edges and press firmly to ensure adhesion without voids.
Smooth from the centre outwards to remove air pockets and creases. Work membrane through the fabric edges to ensure full contact.
Brush membrane over the corner face and onto the adjacent substrate to seal fibres and create a continuous barrier.
Overlap Elastoproof Jointing Bands by at least 40mm onto the corner piece using the same Gripset membrane for adhesion.
Apply membrane to the joint area, lay banding over the corner with the correct overlap, and press to integrate with the corner fabric.
Coat over the seam and corner face to create a continuous, watertight finish.
This product is not classified as hazardous according to Worksafe Australia criteria.
Store in original packaging. Dispose of in accordance with local, state, and federal regulations. Avoid contaminating waterways and sewers during disposal.
Proper surface and membrane preparation are critical for the long-term performance of corner details.
Surface prep: Ensure the surface is clean, dry, and stable, ready for the specific Gripset membrane application. Adhesion testing over a typical area is recommended before full application.
Primer: Follow the primer requirements for the specific Gripset membrane being used. The corner itself must be embedded into a wet film of the membrane.
| Property | Value |
|---|---|
| Product Family | Elastoproof Detailing System |
| Base Chemistry | NBR (Nitrile Butadiene Rubber) - Cured |
| Appearance | Rubber solid, Grey |
| Specific Gravity | 1.2 |
| Solubility in Water | Insoluble |
| Stability | Considered Stable |
| Hazardous Polymerisation | Will not occur |
| Materials to Avoid | Strong oxidising agents and bases, extreme heat, Solvent-based materials |
| Application Temperature Range | 5°C to 30°C (surface temperature) |
| Internal 90° Corner Dimensions | 200mm x 200mm with 120mm wall/floor returns |
| External 270° Corner Dimensions | 200mm x 200mm with 120mm wall/floor returns |
Here are some common examples on where Gripset Elastoproof Prefabricated Corners used by our customers.
