Kiwi Heavy Duty Water Repellent contains 13% silicon for superior water repellency and protection on heavy duty fabrics and boots (not for Gore-Tex). Kiwi Performance Fabric protects all nylons and canvas including Gore-Tex. Allows fabric to breathe while repelling water, dirt and oily stains.
After several times of rain storms coming through during our treasure hunts, I got tired of my gear getting wet in the tent. Even a great tent will leak at some point. I use this spray on my tents before I go out and I have stayed dry every time.