When you're waterproofing a shower or bathroom, the biggest fork in the road is format: a liquid membrane you apply with a brush or roller, versus a sheet membrane that unrolls under tile. The RedGard entries in this lineup show the liquid side, while the two PE rolls show the sheet side. All four options carry listed prices between $63.04 and $86.93, so the gap between formats matters almost as much as the coverage.
Quick take
The RedGard 1 Gal. Waterproofing and Crack Prevention Membrane is the liquid option at the top of the price range, with a 1-gallon format plus crack-resistant, fast-drying, and moisture-resistant features. The Shower 20 Mil Shower Waterproofing Membrane 3.3 Ft X 33 Ft Roll (108 Sq.Ft) - PE and the Waterproofing Membrane for Shower 3.3 ft x 33 ft Roll (108 Sq.Ft share a roll format and PE construction, with the first priced below the second. If you want a liquid membrane, the RedGard option is your match; if you want roll-out sheet coverage, the PE rolls are the less expensive pair.
Listed price comparison
| Product | Listed price | Relative bar |
|---|---|---|
| RedGard 1 Gal. Waterproofing and Crack Prevention Membrane (GTIN 726084366961) | USD 86.93 | |
| RedGard 1 Gal. Waterproofing and Crack Prevention Membrane (GTIN 313050921981) | USD 86.93 | |
| Waterproofing Membrane for Shower 3.3 ft x 33 ft Roll (108 Sq.Ft | USD 63.82 | |
| Shower 20 Mil Shower Waterproofing Membrane 3.3 Ft X 33 Ft Roll (108 Sq.Ft) - PE | USD 63.04 |
The price spread from the least expensive to the most expensive listed price is $23.89. The two RedGard entries sit at the top of that range, and the two PE rolls sit close together near the bottom.
Decision matrix
- You want a brush-on, pre-mixed membrane: The RedGard 1 Gal. Waterproofing and Crack Prevention Membrane is the liquid option here, with no mixing required.
- You want roll-out sheet coverage with a vapor barrier: Choose either PE roll. The Shower 20 Mil roll is the lower-priced of the two; the Waterproofing Membrane for Shower is the higher-priced of the two.
- You are choosing between the two RedGard entries: Both list the same title, price, and major features, so the practical difference is the product identifier. Pick either one.
- You want the least expensive listed option: The Shower 20 Mil Shower Waterproofing Membrane 3.3 Ft X 33 Ft Roll (108 Sq.Ft) - PE sits at the bottom of the price range.
Product notes
RedGard 1 Gal. Waterproofing and Crack Prevention Membrane (GTIN 726084366961)
This is a 1-gallon liquid membrane with a red color family and attributes such as crack-resistant, fast-drying, moisture-resistant, and mold/mildew-resistant behavior. The listed features also include an attached vapor barrier and a pre-mixed, no-mixing-required format. At the top of the group's price range, it is the obvious route if you are looking for a liquid option rather than a roll. The tradeoff is price: the spread from the least expensive PE roll to this entry is $23.89, and because the other RedGard entry shares the same title and price, your choice between the two RedGard copies comes down to the identifier rather than a functional difference.
RedGard 1 Gal. Waterproofing and Crack Prevention Membrane (GTIN 313050921981)
The second RedGard entry mirrors the first: same title, same size, same price, and the same listed feature set. It also carries the same attached-vapor-barrier notes, and both RedGard options list a 1-year product warranty. If you want a liquid membrane and are comfortable with an entry that is functionally identical to the first at the same price, this one is a straightforward pick. The limitation is that you are choosing between two nearly identical entries rather than between different formats; from this RedGard option to the two PE rolls, the listed price gap runs from about $23.11 to $23.89.
Shower 20 Mil Shower Waterproofing Membrane 3.3 Ft X 33 Ft Roll (108 Sq.Ft) - PE
This roll covers 108 sq ft with a 20-mil PE underlayment and vapor barrier, and it sits at the lowest listed price in the group. The described 3-layer construction-reinforced polyethylene core with dual non-woven fabric layers-supports a sheet membrane designed to block water and vapor under tile. If you want a roll-out format and care about keeping the listed price down, this is the option to start with. The limitation is that it is a sheet membrane, so it will not give you the pre-mixed liquid application workflow of the RedGard; you will be working with roll dimensions and thin-set mortar instead.
Waterproofing Membrane for Shower 3.3 ft x 33 ft Roll (108 Sq.Ft
This roll shares the 3.3 ft x 33 ft dimensions and 108-sq-ft coverage of the other PE roll, and its listed price is slightly above the other PE roll. The listed model name is "Shower Waterproofing Membrane," and the described material is a PE underlayment with the same 3-layer waterproofing construction. If you want a roll-out sheet with an explicit model name, this one is easy to identify. The tradeoff is that it costs a little more than the Shower 20 Mil roll, and the two PE rolls are otherwise very close in coverage and material, so the deciding factor is the small price difference and product naming.
Final recommendation
- Choose the RedGard 1 Gal. Waterproofing and Crack Prevention Membrane if you want a liquid option. Either entry works; both share the same listed feature set.
- Choose the Shower 20 Mil Shower Waterproofing Membrane 3.3 Ft X 33 Ft Roll (108 Sq.Ft) - PE if you want the lower listed price in the group. At $63.04, it gives you a 20-mil PE roll.
- Choose the Waterproofing Membrane for Shower 3.3 ft x 33 ft Roll (108 Sq.Ft if you want a PE roll with a clearly listed model name. At $63.82, it is the higher-priced PE roll.
- If you are deciding by format, choose RedGard for a liquid membrane and either PE roll for sheet coverage.
