Mark from Chesterfield, Va writes
I have a deck made of Trex that is a favorite hiding place for wasps and hornets.
Because Tempo Ultra WP is a wettable powder, you may notice a slight white residue left behind after it dries, especially on darker surfaces. You may want to consider using Tempo SC Ultra instead, which is a liquid concentrate that will form a clear solution that will not leave a residue.
Answer last updated on: 05/04/2016