Answers to common questions regarding Waterstops


Is it ok to install Waterstop-RX with nails?
No. Waterstop-RX should be adhered in place with Cetseal. 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.

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

What is the minimum concrete coverage required?
For Waterstop-RX, a minimum 3” (75 mm) 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 2” (50 mm). 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 Cetseal.

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 other than CETCO’s?
Yes. Waterstop-RX has worked successfully to seal concrete joints on projects where another manufacturer’s waterproofing membrane is used.

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


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 Cetseal and pour the new concrete.
Copyright 2024 by CETCO
Terms Of Use | Privacy Statement