Magnetic Clasp Repair




About: I miss the days when magazines like Popular Mechanics had all sorts of DIY projects for making and repairing just about everything. I am enjoying posting things I have learned and done since I got my first ...

This is the imitation leather case for my Kindle. It has a clasp with a button magnet buried in it. Eventually the magnet wears a hole in the fabric retainer on the underside of the clasp.

This Instructable will demonstrate using larger diameter shrink wrap tubing to cover the magnet and hold it in place while giving a neat, professional look.


  • Shrink wrap tubing - 1/2 inch size


  • Scissors
  • Heat gun or a hair dryer

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Step 1: The Cloth Underside

Next to my thumb is some of the soft cloth that retains the magnet used in the clasp. The actual magnet is below my thumb. (I completed this project before I thought about making an Instructable from it.)

Step 2: Two Materials

My wife volunteered to stitch what was left of the fabric around the magnet, but I saw that is extending the present problem into a later date in the future.

Initially I used some black duct tape I had bought as a repair material for a book binding. The duct tape worked and looked good at first. After a few weeks, though, the repeated pulls from the magnet during opening the case loosened the tape, and left unsightly gray adhesive from the tape.

I began to wonder about using shrink wrap tubing in place of the duct tape. But, most shrink wrap tubing comes in a relatively small diameter. At our local hardware store I found 1/2 inch and 1 inch diameter shrink wrap tubing in the drawers containing all sorts of odd parts.

Step 3: Cut to Length

The 1/2 inch shrink wrap tubing is 1/2 inch in diameter when the tubing is rounded like a piece of pipe. But, it is 1 1/4 inches wide when flattened. The clasp on my Kindle case is 1 inch in width. The 1/2 inch diameter shrink wrap will work fine, and will wrap tightly around the clasp.

Slip the shrink wrap tubing over the clasp. Cut to length with a scissors.

Step 4: Shrink With a Heat Source

A heat gun is idea for shrinking larger diameter tubing like this. A hair dryer or a match would have worked, too.

(I did not actually do this over a nice table.)

Step 5: Finished

The shrink wrap tubing gives a nice clean look and should be very durable for a long time.

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    7 Discussions


    3 years ago

    Phil, I saw your comment to my post "Heat-shrink in Not for Insulation Only". Indeed your project is another one application of the heat-shrink tube. I intend to publish post in my private blog regarding heart-shrink non-traditional usage. Hope you will not object if I put there link to this your project.

    1 reply
    Phil Bjumbleview

    Reply 3 years ago

    Thank you. Feel free to link it.
    I was pleased to find odd sizes of heat shrink tubing in the small parts drawers at our local hardware store.


    4 years ago on Introduction

    Phil, look at < > You can heat and stretch the Shrink Wrap Tubing to fit over something it would not normally fit over.

    1 reply

    4 years ago on Introduction

    Nice fix! I will keep this in mind, I have a phone case with a similar clasp which doesn't look very durable.

    2 replies
    Phil BChrysN

    Reply 4 years ago on Introduction

    Thank you, Chrys. I just looked on Amazon for shrink wrap tubing. Naturally, much of it is sized for electrical wires. There are some larger sizes, like 1/2 inch. Most of these come in assortments rather than single pieces. But, I paid about 1/3 the cost of an assortment for a single piece.

    The hardware store I used to get my single piece is quite small. A larger store may have a larger selection of sizes to fit your phone case when the time comes. There is something to be said for checking the fit before you buy, even if you must pay more than you would like.

    ChrysNPhil B

    Reply 4 years ago on Introduction

    Thanks, there is an electronics parts store in town which I know has shrink wrap tubing too.