We have used this product extensively and highly recommend it for its superior ability to hold hydrostatic head blow grade in concrete. Our findings come from our work with constant hydrostatic pressure, fifty feet below grade, thirty feet below river bed. Specifically a very large active leak, combination area of horizontal, vertical and honeycomb cracking on fifth level (bottom level) of parkade. From previous jobs this new technique showed a dramatic improvement in stoppage of water flow with reduced usage of expensive waterproofing products and thus reduced material and labor cost.