How long does RedGard last?
Christopher Harper
Updated on March 09, 2026
.
Similarly, it is asked, can you tile on top of RedGard?
You''ll be fine with thinset over Redguard on walls. It's recommended for waterproofing niches, shelves, and entire shower walls when tar paper or poly are not used as a vapor barrier behind the CBU.
how long do you let Thinset dry before applying RedGard? 1 to 1 1/2 hours
Also Know, can RedGard be painted over?
since you are not installing tile over it, it can be painted with a latex paint. Welcome, Katherine. Redgard is designed to be covered with tile or stone within 72 hours of installation. It is not meant to be left unprotected and latex paint is not gonna be considered a suitable protection.
Do I need to use RedGard over Hardibacker?
Either you use a vapor barrier behind the hardi, or you can use a waterproofing system (like redgard) over the hardi, but you should not do both. As Vic mentioned, hardi isn't waterproof, so no sense in being concerned with the seams. Hardi, while not waterproof will not be affected by water. Water will do it no harm.
Related Question Answers