Santa Clara Glass INC

How to Curve a Shower Door Seal Strip: A Simple Guide

A shower door seal strip is important for stopping water leaks and keeping your bathroom clean and dry. However, not all shower doors have pre-curved seal strips that fit perfectly. That’s where curving comes in.

Curving the seal strip helps it match the shape of your shower door, making sure it seals tightly. This is especially important if your door is curved or shaped differently, as a straight strip won’t do the job. This prevents water damage and keeps your shower area clean by stopping leaks and mold.

If your shower door seal strip is already damaged, you should replace it. If you’re wondering how to replace it, simply remove the old seal strip by gently pulling it away from the door or frame. Then, align the new seal strip in place and press firmly to ensure a secure fit. Top-notch shower door services in Los Altos CA help people to elevate their bathroom with stylish shower doors.

Now let’s learn how to bend your shower door seal strip.

Understanding Your Seal Strip

There are two main kinds of shower door seal strips:

  1. U-shaped seals: They look like a horseshoe and fit onto the edge of the glass door.
  2. Fin seals: These have a single fin that goes into a track on the shower door or frame.

Seal strips are usually made of PVC (flexible and cheap) or silicone (stronger and heat-resistant, but a bit stiffer). Understanding your seal strip type and material will help you choose the right way to bend it.

Method 1: The Gentle Heat Technique (for PVC & Silicone Seals)

This method uses heat to make the seal strip softer and easier to bend.

What You’ll Need:

  • A hairdryer (heat gun can be used with caution for thicker seals)
  • Tape (optional)
  • Clean work surface


  1. Prepare the Seal Strip: Lay the seal strip flat on your work surface. For U-shaped seals, use tape along the open side to keep it from collapsing while bending.
  2. Apply Heat: Use a hairdryer in a low or medium heat setting. Blow hot air along the seal strip for 30 seconds to 1 minute. Be careful not to overheat or distort the plastic.
  3. Bend Carefully: While the seal strip is warm and flexible, gently bend it to the desired curve. Hold the curved shape for a few seconds to let it cool and set.
  4. Test and Adjust: If the curve isn’t perfect, reheat the strip and make adjustments. Avoid over-bending to prevent damage to the seal.

Method 2: The Channel Bending Technique (for U-shaped PVC Seals)

This method uses an existing channel to assist in creating the curve.

What You’ll Need:

  • A sturdy pipe or dowel rod with a diameter slightly smaller than the opening of the U-shaped seal
  • Tape (optional)
  • Clean work surface


  1. Prepare the Seal Strip: Like the heat method, you can use tape on the open side of the U-shaped seal for extra support.
  2. Choose Your Channel: Pick a pipe or dowel rod that matches the curve you want for your shower door.
  3. Bend and Push: Carefully insert the pipe or dowel rod into the open side of the U-shaped seal. Slowly push the rod along the seal to create the curve around it.
  4. Secure and Let It Set: If needed, use tape to hold the seal in place while it sets. Leave it untouched for a few minutes to keep its shape.

Method 3: The Pre-Curved Option (The Easy Way!)

For those looking for an easy solution, think about getting a pre-curved shower door seal strip. These are specifically designed for curved shower doors and eliminate the need for bending altogether. You can simply buy a pre-curved one from a reliable company like Santa Clara Glass INC. They have different types and shapes of seal strips for your bathroom needs. Contact them if you prefer a ready-made solution. Just ensure you measure your shower door accurately to get the correct size and curvature.

Tips for Curving Your Shower Door Seal Strip

  • Measure accurately before you start to avoid mistakes.
  • If your silicone seal is stiff, try using petroleum jelly for smoother bending.
  • Start with gentle curves and gradually bend more as you get more confident.
  • Take your time when bending, heat the seal strip evenly, and let it cool properly between adjustments.
  • Before finishing, check the fit and adjust as needed for a snug fit.
  • Use a gentle heat source like a hairdryer to soften the seal strip, avoiding high heat or flames.
  • Follow the manufacturer’s instructions for the best results.
  • After securing the seal strip, test for leaks by running water along the door edges and make any necessary adjustments.

Maintenance and Care for Curved Shower Door Seal Strips

To maintain your curved shower door seal strip:

  • Regularly clean the seal strip using a mild detergent.
  • Avoid harsh cleaners that can damage it.
  • Inspect the seal strip for any signs of damage such as cracks, tears, or wear.
  • If you notice that the seal strip is not effectively sealing your shower door, consider replacing it with a new one.

Common Mistakes When Curving Shower Door Seal Strips 

Here are some common mistakes to avoid when curving a shower door seal strip:

  • Don’t overheat the strip; it can melt.
  • Measure accurately to avoid fitting issues.
  • Clean and dry the door before sticking the strip.

By avoiding these common mistakes, you can get a smooth curve without any problems.


Curving a shower door seal strip might seem difficult, but with the right tools, materials, and instructions, it’s easy. By following these methods and implementing the tips provided, you can create a perfect curved seal strip to keep your shower leak-free.

Remember to take your time, measure accurately, and use gentle heat when curving the seal strip. Avoid common mistakes and regularly maintaining and giving care will ensure the longevity of your curved shower door seal strip, keeping your bathroom dry and mold-free.

At Santa Clara Glass INC, we take pride in providing high-quality shower door seal strips that are designed to fit your needs. Visit our website or contact us for more information and start enjoying a watertight and stylish shower enclosure today.