Electrical plugs

After adding a metal bumper I can’t find any waterproof plug to seal my BSM connectors. I wrap black electrical tape so water won’t get into it. Any insights on where I can buy waterproof cancellation plugs? I know wrapping with black electrical tape is just temporary/troubleshooting.

 

Could you just use that liquid electrical tape or even Plastidip would help...at least, that's what I'd consider first

 

So, the BSM connectors are now disconnected/ unused? If so, you could use adhesive lined heat shrink. Cut a long enough piece to fit over the connector and leave another inch or two in length. Heat shrink it, squeeze the extra length together to seal it, and fold it over. Then, cut another small piece of heat shrink, slide it over the first piece with the folded over length, and shrink it. This piece prevents the first piece from unfolding and provides another layer of protection from moisture.

$13 Wirefy Heat Shrink Tubing Kit 180 PCS - 3:1 Ratio Adhesive Lined, Wire Shrink Wrap Tubing - Industrial Heat-Shrink Tubing - Black - Shrink Wrap Tubing | Heat Shrink Wire Tubing

https://www.amazon.com/gp/product/B084GDLSCK?ie=UTF8

 

As Mr. Bluecrush said, heat shrink is the stuff. That is what I use on my boat's electrical connections. It hasn't let me down yet.

 

Thank you all for the replies. I will put it to use.