MCM Electronics

Rubber Keypad Repair Kit - Small By Chemtronics (CW2605) MCM Part #20-3890

4 stars 7 reviews
Qty.Volume Price

  • Restores electrical conductivity to worn carbon contacts
  • Forms a tough, flexible, wear-resistant surface
  • Repairs over 50 rubber button contacts
  • Repairs tested to 500,000 keystrokes
  • Specifications Top

  • Includes: Adhesive 3 g (0.1 oz), curing Agent 0.3 g (0.01 oz), stir sticks, and applicator swabs
    Part Numbers
    MCM Part #:20-3890
    Chemtronics Part #:CW2605
    Package Specifications & Dimensions
    Weight:0.1 lbs.
    RoHS Comp:Yes
    Warranty:90 days
    Need to Return?
    Length:8.25 in.
    Width:4.125 in.
    Height:1.25 in.
    Shipping Information
    Extra Shipping Charge:No
    Drop Ship:No
  • Product Reviews Top

    • by Larepair

      on 11/21/2012

      Repaired the keypad on an alarm clock I can't replace

      Overall: 3 out of 5

      I have an electronic alarm clock with a nice digital keypad on it, which allows me to simply 'type in' the settings for the alarm. I have never seen one like this since I bought it many years ago, so when the keypad rubber contacts started wearing out, and would not conduct, I hoped to fix it. This kit did exactly that! Now it is working like new again. My only dislike on this product is that it is like 2-part expoxy, and you must mix ALL of it, as per the instructions. One part is a very small vial of liquid, so trying to guess at mixing 'some' likely won't work very well. Once mixed, the product is only viable for 36 hours. If I could have bought a new clock like this one, I would have done so before paying nearly $30 for this kit to fix its keypad. But under the circumstances, having something that cannot easily be replaced, this kit is a good investment. Note that once applied, the material must be left to cure for 24 hours before reassembly, unless the faster cure method using applied heat is chosen. I did not do that, and left it air dry for 24 hours before putting the clock back together. Hopefully the clock will continue working for decades to come. :)

    • by pantsde

      on 9/28/2012

      Works great

      Overall: 4 out of 5

      Excellent product and works great! Perfect for repairing a worn out vehicle keyfob instead of paying a lot of money for a new one from the dealer. We will see how it holds up in the long run. Only wish it came in a much smaller size that cost a little less. Probably threw out 95% of the product because the leftover dries up in a couple of days (part A & B type of mixture).

    • by bcarty

      on 4/6/2012

      Wish I knew about this before

      Overall: 4.5 out of 5

      My company was sending scopes out when the buttons got too bad at $400 each to repair. When I fixed 3 that were starting to reach the point of being sent out my boss was happy. Having to use it all at once wasn't a problem because of the number of keys I was doing.

    • by nathan thurston

      on 3/13/2012

      Excellent Product

      Overall: 4.5 out of 5

      I have 3 industrial control units that are out of production and the keypads were going out. Replacments would have cost hundereds, if I could even find them. I used this product and all of the keys are currently functioning. It was easy to apply, although the cure time was longer than I expected. I also didn't know you have to use it all within 72 hours of mixing it. It made doing all three with one kit a little hard. (I had to do them 1 at a time and wait the cure time in between) I'm not sure how long it will hold up, hopefully a long time, but so far I am very happy with the results.

    • by djp1997

      on 11/23/2011

      Cheaper than taking my keyboard to a repair shop.

      Overall: 5 out of 5

      My Roland Juno D began having dead keys and after searching the web I found this product. Taking my keyboard to a repair shop would have not only cost a lot it would have been gone for weeks; time I could not afford. I disassembled my keyboard & applied the product to all the contacts, paying special attention to the dead keys, and then sat back and waited. The next day I reassembled my keyboard and it was like brand new! Thanks go to MCM for making a product that does what it says it will do. I will be purchasing more so I have a backup in case any of my other keyboards start having dead keys.

    • by rstrong

      on 9/25/2009

      20-3890 keypad repair

      Overall: 4 out of 5

      I've used this product for years. The entire contents do NOT have to be mixed at one time. A small quantity of the goo about the size of a thumb tack with only what can be held on a small screw driver tip (when dipped into the liquid) when mixed with the screw driver tip (or the "applicator" plastic tool) is sufficient for an entire remote control keyboard set of contacts. The applied layer should be cellophane thin. When cured for day will renew the contacts for years. I rarely had one come back that had been cured long enough. MANY remotes can be repaired with one "kit."

    • by VANEPS

      on 7/16/2009

      The claim that this product can repair 50 keypads is misleading.

      Overall: 3 out of 5

      This product does work very well. However the ad states that this product can repair up to 50 keypads which is true. What the ad does not state is that this product contains two containers that must be mixed together in their entirety and then has a useful life of only 72 hours. If you have only one or two pads to repair then this product is not very cost effective. Only if you have many keypads in need of repair at the same time would it be a great deal. There should be a much smaller amount available at a much lower cost for most people's needs. At over $25.00 including shipping is a heavy price to pay if you have only one or two bad keypads to repair.

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