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Waterstop-RX is a flexible strip concrete construction joint waterstop that provides a positive seal by expanding upon contact with water. Waterstop-RX is an active waterstop that functionally replaces conventional passive PVC dumbbell waterstops. Waterstop-RX is designed for both continuous and intermittent hydrostatic conditions and has been successfully tested to resist 231 feet ( 70 m) of hydrostatic pressure.

The key to the effectiveness of Waterstop-RX is its 75% sodium bentonite content which provides superior expansion to seal cracks and fill small voids. Proven effective on projects worldwide for over 20 years, Waterstop-RX is a reliable and cost-effective solution to preventing water infiltration through concrete joints.

Waterstop-RX is certified by NSF International to conform with the requirements of NSF Standard 61 – Drinking Water System Components – Health Effects, thus certifying that the product can be used in potable water storage structures.

Installation is fast and easy. Simply adhere Waterstop-RX to the concrete, steel, or PVC ( pipes) with Volclay WB-Adhesive and then pour the concrete. Waterstop-RX reduces labor costs by eliminating the workmanship rigors of welding the joints or split-forming associated with traditional PVC dumbbell type waterstops. Waterstop-RX can also be used to provide protection when conventional PVC waterstop has been installed without the joints welded.

Waterstop-RX has a profile with a rectangular cross section of 1� by ¾ � ( 25 x 19 mm) .

Waterstop-RX offers a low cost opportunity to enhance the performance of a sound external waterproofing system, by sealing the areas of highest probability of water infiltration through the concrete, and should therefore be implemented as part of the waterproofing design.