100% Silicone vs Dicor

The Bigfoot clearance lights come from the manufacturer with butyl tape on them, and it isn't quite the same stuff as Bigfoot puts on the windows. I'm not a huge fan of butyl tape either (because it continues to squish out for many years), but it is far better than silicone smeared around the outside which is unsightly, useless for sealing, and actually detrimental in many cases. There are products made to remove it from fiberglass without damage, but it takes time and labor to do. I wish Bigfoot would quit the practice.

Silicone may have come a ways over the years, but even the manufacturers of it will not recommend it for critical sealing applications. There are better products.