If you want to repair your carpet, use the product after cleaning the underside of the carpet and only in a well-ventilated area.... as it smells quite a bit and takes a long time to dry!!! Unfortunately, it smells a lot at first. Personally, I couldn't place it in the children's room without washing it and leaving it for several days (summer) spread out on the balcony.... After a phone call with the company, they told me it is human-friendly (even though it smelled quite a bit for days even after re-washing the carpet!!!!!).... Nevertheless, it did its job.... It stopped the polymerization of the already existing non-slip layer that the carpet had as well as the retention of the fringes