I used the rustoleum floor epoxy on our wood floor on the florida room.Its 7/16' osb over 3/4" treated plywood (it was an outdoor deck before it was a room).I caulked the joints with painters caulk and smoothed them off with a plastic squegee. Its been down for about 9 yrs now and there is not a chip or crack anywhere. There is a futon that gets drug around on it every time the kids come up and the door to the sled shop and the back yard is on it too, so the foot trafic and water is brutal. I did prime it with oil based deck enamel and let that dry for a couple weeks first. I used it on the steps that go up to it as well,they are outside and other than fadeing from uv show no wear.