Yes, we used it on our Sierra Design Stretch Dome, our older car camping, winter/pulk sled tent. We followed the directions, removing any old coating with a scotch brite pad and isopropyl alcohol. We let it dry thoroughly and used talcum powder to keep it from sticking after the initial drying. No problems, and the tent floor has stayed dead dry through several heavy rain events . We used a spray product on the fly, but could have used the brush, also. I have enough left to do another tent floor, and plan on using it soon on our BA FC2. I would do the tent fly, but plan on using Nikwax Solarproof on the fly to help inhibit aging. As far as I can tell, a good product if the directions are followed. I would hesitate to apply it with high humidity and poor ventilation

PS: The floor of the tent was leaking badly before the application. NOT a pre-emptive strike.