Works great save me a ton of money
Product took 90 year old concrete off a waste pipe under my basement slab.  Now I can tee off the waste pipe and install a bathroom in basement.  After applying product to concrete covered cast iron waste pipe I waited 20 minutes then uses the nail-remover side of a hammer to scrap off concrete.  This required a lot of scrapping and three applications.  However it worked great.  Thank You.  Save me a ton of money, plumber wanted to replace the whole pipe under slab. Picture 1 shows pipe, picture 2 shows pipe with this product spayed on and picture 3 shows finished product.  I am so happy.
Rating: 5 stars