Is RedGard good for waterproofing?

Author: Helmer Carter  |  Last update: Tuesday, September 9, 2025

Customers say RedGard is an effective waterproofing and crack prevention membrane that is easy to apply with a brush or roller. Many appreciate its quick drying time and the color change from pink to red, which indicates when it is ready for the next coat.

Can I tile directly over Redguard?

For tile installations bonding directly to the substrate; strongly recommended to apply at least one full coat of "undiluted" RedGard® to the "dry" primed area and allow to dry completely before tile installation work is to begin. When used as a vapor barrier, apply one full coat (70 sq. ft.

Is RedGard enough for a shower?

CUSTOM®'s R&D lab has tested and found that a continuous single coat of RedGard® is sufficient to waterproof WonderBoard® Lite cement backerboard-covered walls for shower application in order to meet building code requirements.

How many coats of RedGard do I need for waterproofing?

Allow these areas to dry before re-applying. For general waterproofing, apply RedGard® at a rate or 110 sq. ft per gallon in each coat. NOTE: A minimum of two coats is required when using a roller or brush to assure that continuous coverage is achieved.

What is the best waterproofing for a shower?

Fluid Membranes

Once dried out, the membrane comes to be an elastomeric layer that stays versatile. RedGard uses among the most popular and also easy-to-apply items for a fast waterproofing of your shower.

Avoid These Two Pitfalls When Applying RedGard

What is the best waterproof sealer for showers?

Choosing bathroom and shower sealants is an important part of any DIY bathroom renovation project. We recommend ARBO Arbosil HM 310ml – Internal Sanitary Sealant, MAPESIL AC – Internal Silicone Sealants – All Colours, and Everbuild Showerproof & Bathroom Sealant 280ml as three of the best options on the market.

What is the strongest waterproofing?

POLYURETHANE

Polyurethane is considered one of the best waterproofing materials. It can be applied seamlessly and penetrates the surface deeply and evenly. Thus, the polyurethane membrane will fill in even the finest cracks in concrete, reducing its water absorbency capacity.

Is RedGard a good waterproofing?

Makes an awesome waterproof barrier. I have used REDGARD on walls and floors, had excellent results. Even after a year with only using 7/16" OSB on top of 3/4" subfloor, my tile is still flawless.

Can you paint over RedGard waterproofing?

Q:Once applied is it paintable? A: We do not recommend painting the RedGard SpeedCoat Waterproofing Membrane. For further assistance please contact our technical services department at 1 800 282 8786 option 2.

What is the cheapest way to waterproof a bathroom wall?

Bathroom waterproofing with liquid membranes is perhaps the easiest and cheapest modern method of waterproofing, which can be applied to any surfaces that come into contact with water or moisture.

How many gallons of RedGard do I need for a shower?

RedGard Creates a Waterproof and Crack Resistant Membrane

Applying RedGard to any surface is super easy. If you can paint a wall you can use RedGard. And for this shower, we only needed one gallon.

Can you put Redguard over plywood?

Gaps between plywood sheets and where floors meet walls must also be prefilled. For continuous crack isolation, cover the entire substrate with RedGard® applied to a minimum 30 mils wet-film thickness. Cracks to 1/8" (3 mm) should be prefilled before beginning the waterproofing application.

Does Redguard prevent cracks?

RedGard Waterproofing and Crack Prevention Membrane prevents cracks in tile and stone floors due to surface movement. The membrane also produces a moisture barrier.

How thick should RedGard be applied?

Apply a minimum 3/64" (1.2 mm) of RedGard over the joint and substrate following the instructions detailed in APPLICATION.

How many layers of RedGard do I need for a shower?

Yes 100% use redgard. I did a shower with it and used 2 coats. Easy and way cheaper than Kerdi board.

What kind of tape do you use for RedGard?

RedGard® Seam Tape - CUSTOM Building Products.

What are the 4 types of shower waterproofing?

There are four main types of waterproofing membranes in use today including sheet membranes, liquid membranes, foam wallboards, and foam shower bases.

Will thinset stick to RedGard?

The adhesive mortar (thinset) used for installing RedGard Fabric Membrane must be appropriate for the substrate and should thoroughly embed in the RedGard Fabric Membrane. To minimize installation duration, precut RedGard Fabric Membrane to size ahead of mixing adhesive mortar (thinset) for installation.

Which is the no. 1 waterproofing material?

Silicone sealant is the best waterproofing material for your home. It is an adhesive liquid that looks like a gel and can maintain its flexibility and balance at both high and low temperatures. It is resistant to other chemicals, moisture, and weather thus minimising the chance of failing.

What is the longest lasting waterproof coating?

Polyurethane coatings are highly durable, solvent-based products that create a strong, water-resistant barrier. They are known for their exceptional resistance to wear, chemicals, and UV rays, making them a long-lasting option for deck waterproofing. Polyurethane is suitable for wood decks as well as concrete decks.

What is the best watertight sealant?

Check out our recommendations for some of the best below the waterline sealants for various uses.
  • 3M 5200. This product is a 3M below the waterline marine sealant, but it also is versatile enough that it can be used above the waterline as well. ...
  • Sikaflex-291. ...
  • Bostik 920 FS.

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