GeoffH wrote in
:

Hello Harold,
Thanks for the info.
Yes we do have an Alganite clay granules product sold by Castrol at
£5/20litre bag called MOP.
Sold as an oil and grease absorbent.
Never used it though.
Before these high tech solutions, I just used cement.

Clay cat litter, the cheaper the better (fewer clumping
addatives and scents).
--Glenn Lyford