After 20 years finally lost the p/u's sealed beam.   Replaced with a halogen
sealed beam.  Noticed the silver reflective material isn't applied where the
leads come in the back.  About 2" non-reflective opening in the back, light
leaks where hood line meets fender.

Spray paint didn't stick to the glass, course it was only about 40 degrees
outside, but had a warm engine compartment.

Is run of the mill duct tape heat resistant enough to apply to the
headlight, or other ideas to solve this minor, annoyance.
Thanks
Mark