- Hydrophilic Rubber Concrete Joint Waterstop



A hydrophilic rubber waterstop, AKWASTOP swells up to 300% upon contact with water and provides a consistent seal along the entire installation. It prevents water infiltration through cast-in-place concrete construction joints subjected to continuous or intermittent hydrostatic pressure.

AKWASTOP is a hydrophilic rubber waterstop that stops water infiltration through cast-inplace concrete construction joints subjected to continuous or intermittent hydrostatic pressure. AKWASTOP effectively stops moisture infiltration by expanding upon contact with water to form a positive seal against the concrete.

The key to AKWASTOP’s effectiveness is its swelling capacity and plasticity to contour the surrounding surface. The hydrophilic agent is distributed throughout the product’s acrylate polymer matrix to provide consistent sealing performance throughout the entire installation. AKWASTOP’s exceptional plasticity allows the product to fill voids and cracks in the concrete immediately around it.

AKWASTOP is designed to replace passive PVC dumbbell waterstops, thereby eliminating the requirement of split-forming and field seam welding. AKWASTOP has been successfully tested to withstand 231 feet (70 m) of hydrostatic water pressure.

AKWASTOP i s manufactured in lightweight, flexible coils that are easily installed by a single worker. The product is adhered to concrete, steel, and PVC (pipes) with CETSEAL. Coil ends are butted together – not overlapped – to form a continuous waterstop. AKWASTOP has excellent chemical resistance to hydrocarbons, salts, and many organic acids and bases.

  • Engineered Volumetric Swell
  • Retains Cohesive Strength at Expanded Volume
  • Reproducible Swell after Wet-dry Cycling
  • Contains No Sodium Bentonite

Applications include both vertical and horizontal cast-in-place concrete joints where limited or no movement is expected. AKWASTOP i s i deal f or n ew t o e xisting concrete construction, and around throughwall penetrations, such as plumbing and utility pipes. AKWASTOP works in both continuous hydrostatic and intermittent hydrostatic conditions. AKWASTOP i s d esigned f or reinforced structural concrete 8” (200 mm) thick or greater with a minimum of 3000 psi compressive strength. AKWASTOP requires a minimum 3” (75 mm) of concrete coverage.

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