Before and After

As you can see by the above before and after photos this manhole had water infiltration and hydrogen sulfide degradation of the concrete.  Less than two hours after we started, the manhole has been cleaned and our three layer Stress Skin liner has been bonded to the manhole: stopping all water infiltration permanently, filling all voids, sealing the casting to the cone and preventing any further degradation of the concrete structure from H2S.