Why Kiln Dried Sand?

Kiln dried sand is used to lock individual paving blocks together. By doing this you stabilize and strengthen the paving block structure. The sand and the paving joints must be dry to allow the sand to fully fill up the joints. ... This is to prevent water ingress into the paving joints.

What is the purpose of kiln dried sand?

Used as an in-fill between block paving, kiln dried sand is a clean, fine, dry aggregate sand for brushing into joints of paving to help prevent movement while still allowing drainage.

Does kiln dried sand need sealing?

Kiln-dried sand is only really likely to go hard if you apply any kind of mix to it, or if it gets wet. ... To allow sand in your joints to solidify, you'll need to look into sealing (which we generally recommend for your home patio regardless), or to get the gaps washed down to allow the sand to cement in.