What is WPC Vinyl Flooring? Top 10 Things to Make You a WPC . Dec 11, 2017 . WPC Vinyl Flooring: Top 10 Things to Make You an Expert. It's 100% waterproof. I mean, this is the trademark of WPC vinyl. The only other floor that can claim to be 100% waterproof is glazed manmade tile. Perfect for imperfect subfloors. Little known fact: because WPC vinyl is so thick and durable, it can..