LaticreteLatasil High Performance Silicone Sealant, Silver Shadow #88

Great stuff. I used this to re-set small 1x1 glass tiles that popped out from my shower floor. Before that I tried waterproof tile adhesive, and when that failed, I used the original mortar for glass tiles. Only this silicone that's rated for pools did the trick. And, you can get it to match your grout color.

I received an expired (by 3 months) and hardened tube. It was rock hard, you couldn't even puncture it. I contacted the company for a replacement and they asked for a picture as proof of expiration--seriously? I don't have time to waste on companies like this, so I sent it back, so they could take their own pictures. I then went to Lowes and bought Mapei silicone seal (Sea Salt) that worked great and was extremely close to Silver Shadow.

This caulk looks attractive. It has a wet sheen.

This matched the same brand grout color perfectly.

Tube was cracked at the nozzle and had completely dried up. Did not notice until I needed to do the project, which was after the return window had closed.

Great product; yet more expensive than I believe it should be

The top of the caulk tub split open, leaving caulk all over the caulk gun and me.

Tube of chalking was dried out. I threw it in the garbage.