Waterproofing critical joints and movement areas demands a system that performs beyond conventional methods. The right approach secures these vulnerable points against the stresses of structural movement and water ingress. Elastoproof B50 Joint Band provides a highly elastic, integrated bondbreaker system for comprehensive waterproofing and sealing, ensuring long-term protection and stability in demanding environments.

Why this product exists

The Elastoproof B50 Joint Band was engineered to detail critical joints, junctions, and areas subject to movement within a waterproofing system. Its innovative design features a central 'Flexible Zone' constructed from a high-strength NBR rubber compound. This allows the band to accommodate movement in longitudinal, lateral, and transverse directions, enabling high elongation, rupture resistance, and up to 100% elastic recovery. It functions as an approved bondbreaker system, seamlessly integrating into Gripset waterproofing membranes to prevent common failure points.

The numbers that matter

  • Movement capacity: Accommodates up to 50% movement of a 20mm starting joint width, delivering significant flexibility for structural movement. This capability, combined with up to 100% elastic recovery, ensures the bondbreaker system regains its original form after joint expansion or contraction, maintaining membrane integrity.
  • Rupture strain: Achieves over 208% lateral rupture strain, indicating exceptional resistance to tearing and deformation under stress. This high elasticity provides a robust and durable reinforcement for critical movement areas.
  • Water pressure resistance: Tested to withstand 3 bar of water pressure, confirming its suitability for applications subject to full immersion and high hydrostatic loads.
  • Temperature resistance: Maintains performance across a wide range, from -20ºC to 90ºC. This resilience makes it suitable for diverse Australian climates and conditions, from cold-storage areas to sun-exposed surfaces (when protected by a membrane).

What it's like to use

Installing Elastoproof B50 Joint Band involves embedding it into a wet bed of liquid membrane. Measure and cut the band to fit all wall/floor junctions and other critical areas. Apply the first coat of membrane, extending approximately 150mm up walls and onto floors. Then, embed the band into the wet membrane, ensuring the fabric edges are fully wet out and no air bubbles are trapped beneath. The central rubber section of the band remains unbonded to allow for maximum movement. For joins, a minimum 50mm overlap is required. For precise detailing in corners, Elastoproof Prefabricated Corners are available and allow the Joint Band to overlap, avoiding joints in these critical areas.

Where this product excels

  • Civil construction projects: Effectively reinforces and creates superior transitions in retaining walls, lift pits, and other civil structures where movement is inherent. It provides a durable and flexible solution for managing structural changes.
  • Crack and joint treatment: Acts as a robust reinforcement fabric for detailing and repair of cracks and joints, ensuring the waterproofing system remains intact over time.
  • Wall/floor junctions and substrate abutments: Forms a seamless, flexible transition at these critical intersections, minimising membrane stress and preventing leaks by accommodating differential movement.
  • Control and expansion joints: Decouples structural movement from the membrane layer, protecting the waterproofing integrity across areas designed for significant movement.

How it fits in a real system

Elastoproof B50 Joint Band is a key intermediate layer in comprehensive waterproofing systems, particularly for landscaped areas, planters, and garden beds. It is typically applied as the second step in a three-step process. After a suitable primer like Everflex VBS Bitumen Primer has been applied to the substrate, the Elastoproof B50 Joint Band is embedded into the initial wet layer of a Gripset liquid membrane. This sequence ensures a fully integrated and flexible bondbreaker system before the final membrane coats, such as Gripset 2P cementitious membrane, are applied. This positioning is critical for managing movement and reinforcing vulnerable transitions within the full waterproofing build-up.

Choose this when

  • When the job requires an approved bondbreaker system that conforms to AS 3740.
  • When waterproofing critical joints, junctions, or movement areas, including wall/floor junctions, substrate abutments, and control/expansion joints.
  • When seeking a system for crack and joint treatment that provides robust reinforcement and accommodates up to 50% movement.
  • When working on civil structures, retaining walls, or lift pits where high elasticity and durability under immersion are required.

Don't use this when

  • Not for: Direct UV exposure as a joint seal in external applications. This product is designed to be embedded within a waterproofing membrane system.
  • Not for: Application with solvent-based materials, including certain adhesives, sealants, or coatings, as chemical incompatibility can compromise performance.
  • Not for: Installation when surface temperatures are below 5°C or above 30°C, to ensure proper adhesion and curing of the surrounding membrane.

As an approved bondbreaker system conforming to AS 3740, the Elastoproof B50 Joint Band provides peace of mind that critical movement joints and junctions are detailed to Australian waterproofing standards. This compliance ensures the product meets rigorous requirements for performance and reliability in waterproofing applications.

A system for superior joint protection

Elastoproof B50 Joint Band offers a distinct advantage over conventional bond breaking sealants and tapes. While traditional methods rely on separate sealants or adhesive tapes that can fail under stress or require precise, multi-step applications, the B50 Joint Band integrates directly into the liquid membrane. This eliminates the need for their application entirely, simplifying installation and delivering superior durability. Its highly elastic, NBR rubber construction ensures long-term protection at critical joint intersections and movement zones, providing a more reliable and time-efficient solution.