Browse Forums Flooring & Floor Covering 2 19428 This has nothing to do with retardant, seems like an improper acid wash or possibly moisture build up during the sealing process. Very hard to determine through photos though. 3 19469 Hi, Sorry to hear you had a rough experience with your concreter. Can I start off by asking if you have had your concrete acid washed and seal? This is usually… 1 1494 |