Review (3/5): Not quite the same as the chemical sunscreens, but does reduce exposure.
We really wanted this to work and we used it instead of the reef killers. Full disclosure, we were already burned before we used the product. Our shorty wet suits kept most of us burn free until we spent a few minutes with out them. Trying to keep the damage to a minimum, the next outing we put a healthy amount on and was able to rub most of it in with very little residual white tint showing. Got in and out, played around and then that night surveyed the damage only to find that (while it did reduce the amount of exposure) it did allow more sun rays in than 50 SPF should. Our proof was sun exposure redness in areas previously covered and were exposed during use. It did bead water up on our skin and was not uncomfortable. If you use this product while operating a camera, be sure not to touch the lens as it could reduce the picture quality.