Hello I bought around the moss to remove this product on my little balcony. I lie on the floor tiles in plastic Holde Sign, and were full of moss. Although the tiles should ansetzten no moss manufacturer. Anyway, now for Peodukt itself. I have on a dry day the tiles sprayed with Roundup and the moss were released after 2 days. The cover up even the stalks between the tiles are rotted away. So I am fully satisfied and would recommend this product only. Today is a sunny day and put on my small backyard all the moss and weeds sprayed. I'm curious as pointed by 2 days looks.