What is RedGard waterproofing used for?

A ready-to-use elastomeric waterproofing membrane for both commercial and residential tile and stone application. Suited for interior and exterior substrates, RedGard® creates a continuous waterproof membrane barrier with outstanding adhesion and reduces crack transmission in tile and stone floors.

Can you tile over RedGard waterproofing?

Can You Tile Directly Onto RedGard? There’s no need to put another layer of product on top of RedGard before you begin tiling. A surface that has been painted with RedGard and allowed to dry is ready for you to apply thinset and install tile. You can install thinset mortar and tile directly onto RedGard.

How do you waterproof a shower with RedGard?

Quote from the video:
Quote from Youtube video: They recommend applying two coats they say you should roll one coat on vertically the other coat on horizontally to better fill all the pits. And crevices in the cement.

How long does RedGard last?


Container Size 1 Gal.
For Use With Interior / Exterior Tile, Stone, Masonry
Coverage Area 110 Sq. Ft.
Shelf Life 18 Mo.
Brand RedGard

Can you RedGard on cement board?

RedGard Creates a Waterproof and Crack Resistant Membrane

If you can paint a wall you can use RedGard. And for this shower, we only needed one gallon. There are two ways to get RedGard on cement board panels: Roll it on the wall with a 3/4 inch nap roller.

How long after applying RedGard can you tile?

Allow the RedGard membrane to cure for 1 to 1 1/2 hours. The color will turn from pink to a solid red sheet with no pink spots when it is fully dry. It is most important that you wait for the color of the product to turn completely red as ambient conditions will make the dry time vary.

Can you apply RedGard to drywall?

Quote from the video:
Quote from Youtube video: And even though red guard says you cannot use it on a gypsum product because it's paper it's all it is as a paper backing. They don't recommend it for paper.

How do you prepare a cement board for Red Guard?

Quote from the video:
Quote from Youtube video: Apply red guard using a three-quarter inch nap rough textured synthetic roller and a paint brush or use a 3/16 inch by 1/4 inch v notch trowel. First pre coat the corners.

How long does RedGard take to cure?

The product is dry when it turns solid red with no pink showing, normally 1-1/2 to 2 hours. Depending on ambient conditions, drying time can take up to 12 hours. A water test can be conducted 72 hours after application if required.

Do I need to seal cement board before tiling?

Although most backerboards currently available won’t fall apart when exposed to moisture and are somewhat water-resistant, they aren’t waterproof. To prevent moisture from seeping through to the wood or metal studs beneath the tile, a barrier or sealant must be used on porous materials.

Is RedGard a vapor barrier?

It bonds directly to clean metal drains, PVC, stainless steel, and ABS drain assemblies and can be used as a slab-on-grade moisture vapor barrier under all types of floor coverings.

What kind of tape do you use for RedGard?

RedGard® Seam Tape

RedGard® Seam Tape is a fast and easy way to cover seams and changes of plane when installing RedGard® Uncoupling Mat and Fabric Membrane to provide waterproofing and vapor barrier protection.

Do you have to use mesh tape with RedGard?

You must also tape the backerboard seams with fiberglass mesh drywall tape. The easiest way I have found to install Redgard is, after the walls are prepped properly, start with a paint brush and thoroughly coat all the corners and angles.

How thick should RedGard be?

Combined dried coatings must be at least 30-35 mils thick. When wet, the combined coatings must be at least 60-70 mils and must not exceed 125 mils wet-film thickness. RedGard® is dry when it turns solid red, with no visible pink color.

Can you use mesh tape with RedGard?

A: The RedGard Seam Tape for Uncoupling Mat Underlayment is incompatible with our RedGard Waterproofing and Crack Prevention Membrane. We would recommend reinforcing the corners by embedding alkali-resistant fiberglass mesh tape.

How long should mud bed cure before Redgard?

All surfaces must be structurally sound, clean, dry and free from contaminants that would prevent a good bond. Newly prepared concrete must be troweled smooth and textured to a fine broom finish and cured for 24 hours.