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How to waterproof a shower niche

by | Mar 16, 2022 | Plumbing Guides

A shower niche is a great feature to have in your bathroom, but if it’s not waterproofed, you’re going to have a big issue on your hands. In this article, we’ll show you how to waterproof a shower niche so that you can avoid any potential water damage.

Waterproofing your shower niche is a simple process that anyone can do and we’ll show you how to in just a few easy steps.

Whether you’re a seasoned DIYer or a complete novice, you’ll find this blog post quite helpful. So let’s get started.

How to waterproof a shower niche

1. Using waterproof membrane

There are a few different ways to waterproof a shower niche, but using a waterproof membrane is definitely the most effective option.

You can either buy a pre-made membrane or DIY your own by buying a roll of waterproofing material and attaching it to the wall with construction adhesive.

For instance, you can use Schluter Kerdi waterproof membrane to create a watertight seal around your shower niche.

Kerdi is a waterproofing membrane that’s often used in showers and other wet areas. It’s available in rolls, and you simply cut it to size and then install it over the area you want to waterproof.

It is easy to work with and does a great job of keeping water out. Moreover, tiles can be installed on top of the membrane.

See also: Best shower niche

2. Tile and grout sealer

Tile and grout sealer is a product that helps to protect your tile and grout from dirt, stains, and water damage.

It is applied to the surface of the tile and grout, and works by creating a barrier that repels water and other liquids. The sealer can also help to fill in any cracks or voids in the grout, which can prevent further damage.

Tile and grout sealer is available in both clear and colored options, and should be reapplied every few years to maintain its effectiveness. When shopping for a tile and grout sealer, look for one that is water-based and has a low VOC (volatile organic compound) content

2. Using a silicone sealant

Silicone sealant is a popular choice for sealing around bathroom fixtures, as it is durable, water-resistant and will not corrode over time.

It can be used to seal around bathtubs, showers, sinks and toilet bowls, and is available in a variety of colors to match your décor.

There are a lot of different types of silicone sealant out there, but the most common one is the standard silicone sealant. It can be used for a variety of applications.

It’s great for sealing around showers, tubs, sinks, and countertops. It’s also waterproof and mildew-resistant, so it’s ideal for wet areas like bathrooms and shower niches.

To waterproof your shower niche using silicone sealant, apply a thin layer of silicone sealant around the edge of the shower niche and allow to dry before using the shower.

Do you grout or caulk a shower niche?

The answer to this question really depends on the shower niche itself and what kind of look you’re going for.

If the niche is made of tile, then you’ll need to grout it in order to give it a finished appearance. However, if the niche is made of another material, like acrylic or fiberglass, then you may be able to get away with caulking instead.

Ultimately, it’s up to you and what you think will look best in your shower.

How do you waterproof a plastic shower niche?

One way to waterproof a plastic shower niche is to use silicone sealant.

First, make sure the surface of the niche is clean and dry. Then, apply a thin layer of silicone sealant to the surface and let it dry completely.

For extra protection, you can also spray the niche with clear acrylic sealant or paint it with a waterproof coating.

Can you use Redgard over Kerdi band?

Sure, you can use Redgard over Kerdi band. In fact, it’s a common practice to do so.

Redgard is a waterproofing sealant that can be applied over tile or stone to help protect them from moisture and water damage.

Kerdi band is a self-adhesive waterproof band that helps to create a watertight seal between the floor and the wall. Together, they make a great team for waterproofing your shower installation.


So, there you have it; how to waterproof a shower niche. It’s not as hard as it seems and with a little bit of effort, there will be no more water damage or mold problems with your shower niche.

You can use a Kerdi membrane, tile and grout sealer or silicone sealant. Whichever route you choose, make sure you seal the niche completely so that there are no gaps or holes where water can seep through.

If you have any questions about the process or want some help waterproofing your own shower niche, don’t hesitate to reach out to a professional.

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