Hydro-expansive and resin waterstop
RASCOtight hydrophilic products work by expanding their volume upon contact with infiltrating water. The contact pressure built up against the adjoining concrete by this expansion serves to create a watertight barrier. Failure to observe the minimum concrete cover of 100 mm may lead to concrete spalling.
RASCOtight hydrophilic products can be used to waterproof construction joints and penetrations. Some products are self-adhesive while others are fixed mechanically. The products must always be installed in such a way as to create a complete and continuous system.
To prevent premature swelling of the hydrophilic strip materials, these require adequate protection against rainwater and other precipitation prior to concreting. Materials that have swollen must not be cast into the concrete.