We had bought this balancing weight at the hardware store - and the Vorrezensent's right: after about 6 hours a fly has landed in the ground - and lost. I then killed because she was so busy with this damned ground that they would have died miserable. After 2 hours walk on is a bad joke - as well missing a zero. After 3 hours, I looked on the net and found here the review. So I have to now more than 6 hours, at least the hope that the mass is determined. I have paid per bag at the hardware store about 32 euros - because of the fast drying time, because as the only toilet is now blocked. Lugato products I'll never buy - there are still other manufacturers, such as Tubag. That had acquaintances and because everything turned out as described. I am really angry. ,