get silicone 2 unless you can't find it and there's only silicone 1.

blowdryer = heat gun

silicone 2 = $4
caulking gun = $1.60
high-temp black gloss spray paint = $3

smoking headlights yourself = 2-3 hours, maybe 4
money you save = $150...money you earn = 150/3 = $50/hour