How long would a cardboard box last when exposed to typical weather elements? Not long. What about when it's coated in R-Guard FastFlash? We're not holding our breath, because it'll be awhile.
While a waterproofed cardboard box may not serve a specific purpose, this demonstration with YouTube personality and builder Matt Risinger shows an example of how effectively the fluid-applied FastFlash can waterproof something made out of trees, like most of our homes.
Notice that the water is poured into the box while the FastFlash is still wet! How is that possible? FastFlash and the other silyl-terminated polymer products in our R-Guard line are moisture-cured and immediately waterproof.