IDROSTOP Waterbar

IDROSTOP Waterbar – Hydrophilic Rubber Waterstop for Watertight Concrete Joints

IDROSTOP Waterbar is a hydrophilic, expandable rubber waterstop designed to provide a watertight seal in construction joints of concrete structures. Made with an acrylic polymer base and free of bentonite, it gradually expands on contact with water to form a durable, flexible barrier—resisting both positive and negative water pressure up to 5 atm.

Ideal For:

• Sealing construction joints in foundations, tanks, retaining walls, and tunnels

• Waterproofing precast elements and second pours of concrete

• Adhering to concrete, PVC, metal, and natural stone surfaces

Key Benefits:

• Active hydro-expansion on water exposure

• Flexible preformed strip adapts to movement

• Non-bentonite: no degradation or leaching

• High-pressure resistance: up to 5 atm

• Easy application with Idrostop Mastic (MS polymer adhesive)

Sizes & Packaging:

• IDROSTOP 10: 20×10 mm – 6×10 m rolls (60 m total)

• IDROSTOP 15: 20×15 mm – 6×7 m rolls (42 m total)

• IDROSTOP 25: 20×25 mm – 6×5 m rolls (30 m total)

Ensure high-performance, long-lasting waterproofing in your concrete joints with IDROSTOP Waterbar—trusted for structural integrity and leak prevention.