How to waterproof a bathtub

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How to waterproof a bathtub

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Project Overview

By waterproofing the frame of your bath you help protect the frame from water damage. We show you how to apply the waterproofing membrane yourself. You’ll also see how to prime the surface and cover all the joints properly with reinforcing tape.
Continue to step-by-step instructions
Time Required

Weekend Project

Weekend Project

A project to keep you busy for a whole weekend

 

Step by Step Instructions

1 Prime the surface of the bath frame
2 Apply the waterproofing membrane to the surface
  • Step 1. Prime the surface of the bath frame

    Use a paint brush to put primer onto the whole area you want to waterproof. Use a generous amount on every surface. This helps the primer to penetrate the surface properly and create a good seal. It also makes the surface more adhesive for the waterproof membrane.
  • Step 2. Apply the waterproofing membrane to the surface

    Measure up the edges, corners and internal joints that need to be waterproofed. Then cut lengths of reinforcing tape to cover these areas. Paint a coat of waterproofing where the tape will be installed and then put the tape over the top of the still-wet area. Use your brush to flatten the tape out and push it into the corners. Then paint another coat over the top of the tape to reinforce the joint further. To finish, paint the rest of the surface and allow it to cure for at least 24 hours.

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