.

Subsequently, one may also ask, does polymeric sand expire?

If your polymeric sand didn't harden up, it's pretty much guaranteed there's a moisture issue. If the joints remain wet after the installation, they will remain soft until they dry. So getting one initial complete drying "set" is very important to the long-term performance and lifespan of the product.

Beside above, what happens if polymeric sand gets rained on? Installing polymeric sand on a damp or wet surface could cause the sand and polymers to stick to the surface and become difficult to remove. After installation, a hard rain on polymeric sand that has not fully set up could result in polymeric sand all over the top of the pavers.

In this regard, can polymeric sand be reapplied?

i usually reapply polymeric sand on my interlock about every 2-3 years in certain spots. some places develop divots that need more sand. like CaptSmethwick mentioned new sand won't sit on top of old sand but if you have places that are deep the new sand will adhere.

Can you seal over polymeric sand?

In most cases, we prefer to use a joint stabilizing paver sealer over polymeric sand. If your only priority is to harden the sand in the joint of your pavers to prevent sand loss and weed growth, polymeric sand may be the better option.