I laid a flagstone patio in the back yard last weekend. Monday after all was laid in place, we hosed it off to clean it good. Tuesday after work, I swept in 5 bags of Polymeric Sand and followed the directions of slowly sprinkling water at intervals.
When I applied the poly to it, the flagstone was dry as per instructions but underneath was still moist in the sand bed. I figured that because the sand will stick to the surface of the flagstone if wet, being damp in the sand bed wasn't a problem.
Well, today which is 2 full days after, some of it doesn't seem too well set up. The surface feels like there is a hard crust and is soft underneath. I went back and re-read instructions and I guess I messed up. It says that everything should be dry and if there is moisture undeneath, the adhesive will rise to the top.
For you pro's who work with this stuff, is there a chance that this will in fact harden up or am I going to have to dig this stuff out and re- do it? If I have to do that, I may just put mortor in next time.
By the way, the product was Techni-Seal HP.
Thanks for any help or advice.
DIY.
Admin edit: This discussion has been included in the site beginner's polymeric sand page.