Johnny Grip worked as promised. I used it on a porcelain tub and it solved the slipping problem we had been worried about for almost ten years. It does remove the shine where applied, but that's a fair trade off for the safety. Tub still seems to clean up fine.

After using a Different product that flat out didn't work, was very expensive and labor intensive I went online and saw a video of Johnny Grip that was pretty amazing. So I ordered a gallon and sceptically watched my husband apply the product to our outdoor tiled entry and walkway. WOW or WOOOOOOW!!!!! It worked beautifully and just as described. Still to this day it has remained non slippery. So, I ordered another gallon to treat our outdoor upper balcony that is so slippery when wet that it is scary. Thanks for inventing this wonderful product.