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.

Why this product exists

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.

The numbers that matter

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.

What it's like to use

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.

Where this product excels

This product excels in detailing critical junctions across various applications:

  • Balconies and Podium Structures: Providing robust, elastic corner flashing where movement and weather exposure are constant challenges.
  • Wet Areas: Ensuring seamless, waterproof transitions in bathrooms, showers, and laundries, eliminating vulnerabilities at wall-to-floor junctions.
  • Water Features and Tanks: Reinforcing corners in water storage and containment systems, where persistent water pressure demands unwavering integrity.

How it fits in a real system

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.

Choose this when

  • When detailing critical 90º or 270º corner intersections in waterproofing applications.
  • When seeking a fast, effective method to achieve a seamless, elastic, and waterproof corner seal.
  • When integrating with Elastoproof Jointing Bands and other Gripset membrane systems for consistent performance.
  • When working on balconies, wet areas, or water containment structures where traditional detailing methods are prone to failure.

Don't use this when

  • Not for: Direct application over solvent-based materials, including adhesives, sealants, or coatings. Compatibility issues may compromise adhesion and performance.
  • Not for: Use outside the specified temperature range. Avoid application when surface temperatures are below 5°C or above 30°C, as this affects membrane cure and bond.

Integrating with the Elastoproof System

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.