How to Properly Seal a Grab Bar to Ensure Waterproof Installation

Installing a grab bar in your bathroom is an excellent way to ensure safety, but it’s crucial to seal it properly to prevent water damage over time. Here’s a step-by-step guide to help you ensure the waterproof installation of your grab bar.

Materials Needed:

  • Drill
  • Pilot bit
  • Silicone kitchen & bath sealant
  • Screws for the grab bar
  • Grab bar with flange
  • Cloth for cleaning excess sealant

Step-by-Step Guide:

  1. Drill a Pilot Hole: Begin by drilling a pilot hole in the wall for each screw used to install the grab bar. Each hole will guide the screws and help prevent the wall from cracking.
  2. Fill the Hole with Silicone Sealant: Before inserting the screws, fill each pilot hole with silicone kitchen & bath sealant. This sealant is designed to be waterproof and will create a barrier to prevent water from seeping into the wall through the screw hole.
  3. Seal the Flange: For additional protection, apply a layer of silicone kitchen and bath sealant on the back of the grab bar flange before installation. When you attach the grab bar, the sealant will compress and create a watertight seal between the flange and the wall.
  4. Attach the Grab Bar: While the silicone sealant is still in its liquid form, insert each screw through the grab bar and into the pilot hole. Tighten the screw securely to attach the grab bar to the wall.
  5. Allow the Silicone to Cure: Once the grab bar is attached, let the silicone sealant cure. As it cures, the silicone will form a waterproof seal around each screw, adding a layer of protection against water penetration.
  6. Remove Excess Sealant: After installing the grab bar and allowing the sealant to compress, remove any excess sealant that protrudes past the flange. This step is important to ensure the flange cover can attach properly and give a neat finish.


By following these steps, you can install a grab bar in your bathroom that is not only sturdy but also resistant to water damage. Proper sealing is essential to maintain the integrity of your walls and prolong the life of your grab bar installation. With careful preparation and the right materials, you can ensure a safe and waterproof grab bar setup.

For more information on grab bars placement and selection in the shower, Click Here.