How to seal a shower door

Written by mike biscoe
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A shower door seal ensures no moisture leaks outside the shower. Important for both safety reasons and for ensuring the long life of the bathroom floor, a shower seal is a simple DIY project that takes only a small amount of time, tools and material to complete.

Skill level:
Moderately Easy

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Things you need

  • Shower door seal
  • Razor blade
  • Rubbing alcohol
  • Rag
  • Tape measure
  • Ink marker
  • Hacksaw
  • Masking tape
  • Utility knife
  • Silicone
  • Shower sealant

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  1. 1

    Clean the inside bottom of the shower door where the shower door seal is to be mounted. Scrape the area with the razor blade if necessary to remove any debris that may be stuck to the door. Thoroughly wipe the area afterward using rubbing alcohol and rag. Repeat along the back edge of the shower seal.

  2. 2

    Measure the bottom of the shower door along the inside using the tape measure. Measure the shower door seal to the same length and mark using the ink marker. Cut along this line using the hacksaw.

  3. 3

    Apply masking tape to the top edge of the shower door seal. Stick the seal to the shower in the planned position. Step into the shower and open and close the door to ensure the door can be properly closed. If the side of the seal obstructs the door from closing, cut the seal as necessary using either the hacksaw or utility knife.

  4. 4

    Cut the top 1/8 inch of the tube of silicone with the utility knife. Apply the silicone slowly to form a bead across the length of the shower door where the seal is to be set. Place the shower seal in position on the shower door. Wipe away any excess silicone using a rag.

  5. 5

    Apply the sealant along the top and side edges of the shower seal to ensure no moisture seeps behind, possibly weakening the adhesive and leaking onto the outer floor. Apply masking tape to hold the shower seal in position while it dries. Allow the silicone to set for at least three hours before removing the masking tape.

Tips and warnings

  • To avoid leaks, ensure that there are 2mm between the bottom of the shower door seal and the edge of the shower itself.
  • Utility knife accidents are common. Mind your fingers.

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