Actually, we had already decided to renew the joints in the bathroom in the shower area completely. Everything we had previously tried to eliminate the black spots in the joints, has not really brought anything. I happen to be encountered on the Internet on the Ago Mildew and decided that this should be a last attempt. The many positive reviews but had aroused my curiosity and let me hope. The day before yesterday evening I have this 5tlg. Set then ordered and now it has already been delivered in the mail! I immediately got down to work. Even when applying smaller first improvements were visible. Despite skepticism of my husband I have are brushed the stains on the paneling in the shower area. I thought to myself, hop or top. And what can I say? My husband and I are very excited !!! Now we can save us tearing out the paneling and the removal of unsightly joints! Everything's gorgeous white and for just 35! The bathroom renovation so we have initially shifted :-).