Thanks for all those tips Norm K and pau 13z.
I have a shed that bloody leaks water all over the floor from the sides and pools up after a downpour. I have to vacuum it out each time. Whoever put in the cement slab put too much excess on the sides I think. I have put silicone sealant all around to no avail. Not good for preserving my mower I want buried with me.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!