Volclay Waterstop RX

Can Waterstop RX be used in potable water tanks and facilities?
Yes. Waterstop RX is certified by NSF International to conform with the requirements of NSF Standard 61 for use with potable water concrete tanks with a minimum capacity of 3,785 litres (1,000 gallons).

What adhesive should be used to install Waterstop RX in cold weather?
Use Volclay SB-Primer or Cetseal to secure Waterstop RX in cold weather conditions. Volclay SB-Primer is specially formulated to work with Waterstop RX in freezing temperatures down to -7°C (20º F). Do not use other unapproved adhesives or nails to secure waterstop.

What is the minimum concrete coverage required?
For Waterstop RX 101 and 101T, a minimum 75 mm (3”) of concrete coverage must be maintained from the edge of the product to the exterior face of the concrete. Waterstop RX 102 requires a minimum concrete coverage of only 50 mm (2”). The minimum concrete coverage must be maintained over the entire product installation.

Is Waterstop RX an expansion joint sealant?
No. Waterstop RX is designed for use in non-moving cast-in-place concrete joints. A properly engineered expansion joint product should be used to seal expansion joints.

Can Waterstop RX be used around slab and wall penetrations?
Yes. Waterstop RX is a great solution for sealing around pipes and other penetrations, where conventional passive PVC dumbbell waterstops can not be installed. Simply secure Waterstop RX around the penetration with Volclay WB-Adhesive.

Does Waterstop RX have to be replaced if it rains prior to the concrete placement?
Typically, Waterstop RX does not need to be replaced if the product is exposed to water for a short time period prior to concrete placement. If it rains, standing water should be removed as soon as possible and the product should not be left submerged in the water. As long as there is no notable expansion of the product, Waterstop RX would not need to be replaced.

Can Waterstop RX be used with other waterproofing systems?
Yes. Waterstop RX has worked successfully to seal concrete joints on projects where another manufacturer’s waterproofing membrane is used.

Is it ok to install Waterstop RX with nails?
No. Waterstop RX should be adhered in place with Volclay WB-Adhesive. The adhesive secures the entire length of the waterstop installation so that the product can not shift or float during the concrete placement. If desired, nails can be used in conjunction with the adhesive application.

Do you have to weld or glue the roll ends together?
Unlike PVC dumbbell waterstops, Waterstop RX roll ends do not need to be hot-air welded or glued. Simply abut the rolls ends tightly together to form a continuous waterstop.

Can Waterstop RX be used to seal new-to-existing concrete placement?
Yes, save time and money. Waterstop RX is a great solution for sealing the joint at new-to-existing concrete placement. Unlike conventional PVC waterstops, you do not need to saw cut or chip out part of the existing concrete to embed half the dumbbell. With Waterstop RX you simply secure the waterstop to the surface of the existing concrete with Volclay WB-Adhesive and pour the new concrete.

For further product information please see our Waterstop RX product page