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Put In Place
No glue, paint, adhesive, etc...
Will not wear out!
material tested over 1 million button presses with no degradation
Membrane keypad has a spacer to hold the black conductor up off the board. The original rubber keypad presses down on the new membrane keypad.

Clean the gold button contacts on the circuit board with Isopropyl alcohol and a Q-Tip


Good job and thank you for your innovatio
Recently I ordered two button repair matrices for two GBC Ultima 65 heated laminators I was called to repair. Both laminators were about the same vintage. Both laminators had control panel issues and both were unusable. One laminator was worse than the other. I started with the better of the two laminators by following your directions for cleaning the boards with alcohol and a Q tip. The first board had some "residue" on the gold-plated pc terminal. It cleaned up okay. (not beautiful but satisfactory). After re-assembly the operation of that first laminator was restored. The keypad had renewed tactile resistance and felt "fresh".
I repeated the same process on the second worse laminator. The "residue" on the second board was heavier and more stubborn. Knowing that the gold plating on the board is microscopically thin, I only scrubbed up until I felt uncomfortable going further. Once reassembled the second board still failed in the same manner as before. I assumed that the residue was the problem so I went back at cleaning it. I had pushed the Q tip with alcohol as far as I could. Next I used the eraser end of a pencil dipped in alcohol and lightly brushed the grime. Only a few strokes and the residue surrendered and the gold plating became bright & lustrous! Once reassembled, that laminator operation was restored.
I don't know how safe it would be for you to suggest to others about using the eraser. but for me it worked like a charm.
The matrices you supplied me fit perfectly, arrived timely, reasonably priced and cured the defect. I am a happy customer and my customers are happy customers.