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Easy Button for Kapton Repairs

by LeftAngle, published

Easy Button for Kapton Repairs by LeftAngle Aug 19, 2012
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I prefer to repair my Kapton tape whenever I can. The problem of cutting small patches from sticky tape and trying to round the edges is nearly impossible (repairs fail when corners lift. Making patches round, solves this problem).

Here's a nifty way to make round repair buttons that can be placed at a moment's notice.


  1. Place Kapton tape onto a clean smooth, plastic surface to be used as a substrate. I used a scrap piece of styrene.

  2. Use a circle template to scribe circles of various sizes. Cut through the tape and into the substrate.

  3. I cut quite a few at a time and keep the card in the printer. Whenever I tear the tape on my build plate, I simply peel a button off, place it on the tear and I'm back in business.

Tools you'll need:

• Scrap sheet of plastic (the flat side of a used plastic container would work fine)
• Sharp knife (the pointier the better... I use a #11 scalpel or Xacto blade)
• Circle Template (actually, any circular object can be used to scribe your buttons... Careful with that knife!)

btw... I had to upload a non-image file, so the file I chose is a wire clip I made to fit the replacement heater harness that is .030" larger in diameter than the original that came with the printer. It snaps over the original harness clips on the printer base and the bottom of the build plate and holds the new harness just fine.

Maybe someday, I'll figure out how Thingiverse works, but for now, that's my workaround... :-)

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You could get an Olfa CMP1 Hobby Tool Circle Cutter to easily cut circles in the Kapton

Great idea! thank you posting it.

Being the cheap git that I am, I'm going to use this with mah trusty bluetape. ;D

would a craft circle punch be easier to cut out the patches? you could lay the tape on wax paper or parchment paper as a backer then use the punch to cut out the small circles. something like this, although this is 1" which may be larger than needed, they make smaller ones that may be better. http://www.amazon.com/Fiskars-Squeeze-Punch-Medium-Circle/dp/B000OMYCXKhttp://www.amazon.com/Fiskars-...

That's a great idea. I tried a 3/4" punch made from thin wall steel pipe, but even though it made an indentation that I could follow with a knife, it didn't cut through the tape. I think the key is the material that the tape is applied to. Perhaps a double layer of Kapton on top of a 3x5 card. The first layer would stick to the card, but the second layer would peel away like it does on the roll.