[karygate]

hi i use dry kiln to sand between block drives but am cleaning some slabs that i will need to fill afterwards . do i use same sand or can i use something else. some of the gaps are a couple of cm apart.

[Andy Foster]

Wickes's patio grout (or goefix if you want to pay top bucks for the same thing).
Kiln dried sand is not the right thing to use, the patio grout is self curing and gives a great finish.

HTH