Water-swelling Rubber Waterstop Strips

Key features

• Hydrophilic expansion: Rapid, controlled expansion when exposed to water to seal joints and prevent leakage.

• Durable material: High-quality rubber compound resistant to aging, salts and most chemicals.

• Multiple fixing types: Self-adhesive (peel-and-stick) or mechanical (nail/fixing strip) options.

• Reliable joint performance: Designed for construction joints, cold joints, post-pour strips and pipe penetrations.

• Easy on-site handling: Clean cuts, smooth overlaps, and simple corner detailing for fast installation.

• Standards & traceability: Supplied with batch test reports and conforming expansion performance.

Typical applications

• Basement retaining walls and floor slabs

• Water tanks, reservoirs and swimming pools

• Tunnels, culverts and subways

• Sewage and wastewater treatment structures

• Irrigation channels and retaining structures

Technical highlights (example specs)

Note: Final specs vary by model. Provide model-specific datasheet on product page.

• Typical sizes: 30 × 20 mm, 20 × 15 mm, other custom widths available

• Final expansion: ≥ 220% (example target)

• 7-day net expansion: ≤ 60% of final expansion (controlled/slow swell)

• Material: Hydrophilic rubber compound (proprietary polymer blend)

• Fixing: Self-adhesive backing or nail/strip fixing

• Packing: Coils (10 m / 20 m / 30 m) — packed on pallets

Why choose water-swelling rubber waterstop strips?

1. Active sealing — Unlike passive mechanical stops, these strips actively swell to fill micro-gaps formed by shrinkage, settlement or cracking.

2. Low maintenance — Once properly embedded and protected by concrete, they provide long service life without external maintenance.

3. Versatile installation — Suitable for direct bonding, groove installation or combined use with groutable composite waterstops (with injection tube).

4. Cost effective — Lower installation time and reduced need for repeated remedial works.

Installation highlights (do’s & don’ts)

• Do prepare substrate: remove laitance, expose sound concrete, ensure dry surface.

• Do center the strip in the construction joint and maintain recommended overlap ≥ 50 mm.

• Do protect installed strips from rain and construction water before casting.

• Don’t butt joint ends—always lap; avoid direct contact with vibrator; maintain minimum concrete cover.
  (Provide full installation guide and datasheet download link on the product page.)

Ordering & quality assurance

• Provide product code, size and required length per run when enquiring.

• Samples and batch test reports available on request.

• Third-party testing and certificate support (e.g., expansion test reports) upon order.