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Originally Posted By: Replacement
JB Weld is a two-part epoxy that cures black.


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Nope. It mixes gray and cures gray.
JR


You are correct, but it's a dark gray.

Here is another JB Weld product that may be a better solution for plastic base plates, and this one is black.

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J-B WELD PLASTICBONDER (Black): A quick setting and multipurpose two part urethane adhesive & gap filling system that provides a strong and lasting bond to many plastic surfaces J-B Weld PlasticBonder is great for DIY plastic repairs,...
CURE AND SET TIME: After mixing the two part formula with the included mixing tray and stir stick, PlasticBonder takes 15 minutes to set and 30 hours to cure J-B Weld PlasticBonder set and cure color is black

https://www.amazon.com/J-B-Weld-50139-Plastic-Adhesive/dp/B01IBOK7FE