05/23/2026
The red coating painted onto shower walls before tiling is most commonly called RedGard.
It is a brand name for a liquid waterproofing and crack-prevention membrane.
How it works: It goes on pink and dries into a solid, rubbery red layer. Tile and grout are not actually waterproof, so this layer acts as a protective shield to prevent water from soaking into your walls and causing mold or wood rot.
Application: It is painted or rolled onto cement backer boards (like an extra-thick coat of paint) and usually requires two coats to ensure there are no pinholes where water could seep through.
Now that the shower is waterproof we are able to install the beautiful tile! ❤️