AKWASTOP Hydrophilic Rubber Concrete Joint Waterstop

Waterproofing that's Effective and Efficient for Concrete Joints

AKWASTOP is one of the world’s leading products for preventing water infiltration in concrete construction joints.


It lives up to its name.



Consistent sealing throughout your installation

For new and existing cast-in-place concrete construction joints, as well as around pipes and structural penetrations, AKWASTOP is effective and efficient protection against water penetration. Working as an active barrier for structures under either continuous or intermittent hydrostatic pressure, AKWASTOP substantially reduces the possibility for leaks—its hydrophilic agent absorbs water and expands to seal cracks using the very pressure of the water itself to fill and block any gaps.


Easy installation saves you money

AKWASTOP is also easy on your budget, saving you money in time and installation. With its improved performance predictability, it replaces traditional PVC/Rubber dumbbell waterstops and eliminates the need for special pieces, split-forming, and seams. AKWASTOP is manufactured in lightweight, flexible coils and can be easily installed by a single worker without extensive training—Simply apply it to a prepared surface and press it into place.


How it does it

AKWASTOP features a hydrophilic agent distributed throughout its acrylate polymer matrix and has been successfully tested by independent testing firms to over 70 meters (231 feet) of continuous or intermittent hydrostatic water pressure.


CETCO - Pioneer and leader in waterproofing

CETCO is the leader and pioneer in cutting-edge waterproofing solutions. Around the globe, our innovative teams of clay mineralogists, chemists, and polymer scientists transform ordinary minerals into extraordinary technology to solve day-to-day problems worldwide.







    A multi-purpose UV stable single component polyether moisture cure sealant/adhesive. Primary applications are grade termination sealant, membrane lap sealant and waterstop adhesive.

    Learn more

    In the News
    Sealing Cold Joints with Waterstops - Waterproof Magazine, April 2017
    Understanding Waterstops: To Ensure Success, One Must Specify for Performance, Install with Care - Construction Specifier Magazine, June 2015
    Installing Thermoplastic or Rubber Waterstops - The Construction Specifier Magazine, June 2015
    Technical Data Sheets