On first application the product may be used neat, by mop and bucket or by handspray units. Agitate and allow to dwell for a minute or two, then rinse off with clean water. Because the product is caustic-based, rubber gloves, goggles, etc. should be worn when applying. If sprayed, it is important to use respirators to avoid inhaling the mist. The product should be rinsed thoroughly from floors and walls to avoid contact by shower users.