How to ensure granitic sand sets in place?

[JoB166]

Hi, I’ve done two rounds of granitic sand in my back yard, following the correct process and using a compactor. There are some small areas where it is just not compacting and sticking together. 

is there something you could suggest? Or a product I could use to put on top to help these areas set? 

[JacobZ]

Hi @JoB166,

There's a good chance the areas where the granitic sand is falling through have a cavity beneath. You could simply keep adding granitic sand and compacting until it stops subsiding, but this may take some time.

Alternatively, you can use Powerloc Polymer Paving Sand which has a polymer additive that when wet will bind the sand together between the pavers.

Let me know what you think and if you have any further questions, please don't hesitate to ask.

Jacob