Polymeric sand is a granular form of sand with polymers added to it. It’s use has been growing in popularity in the past few years and it has successfully replaced the use of torpedo sand and silica.
How to Use Polymeric Sand with Travertine Pavers:
After travertine paver installation is completed, sweep Polymeric Sand into the joints carefully with a broom. Repeat this sweeping process two more times until you are sure that all voids, joints and cracks are filled with polymeric sand. Afterwards, you need to make sure there is no sand left on the surface of the pavers. We suggest the use of a blower in order to get the residual sand off from the surface.
The next step is to wet the pavers gently with water. You should be careful while doing this in order not to spray directly into the joints. Misting water is the best way to do this. What you are trying to achieve is to activate the polymers in the sand in order to harden the filler. Polymeric sand hardens when it gets wet for the first time and turns into a sort of caulk-like substance, blocking weeds and holding everything in place. After you are done let the sand set for 20 minutes. You should repeat the misting process one more time afterwards.
The hardening may take up to 24 hours.
Paver Set Polymeric Sand: http://amzn.to/1kG1fMK