Pretty easy to tell the difference
Originally Posted by 007matman
If it's squeezing out it's likely Butyl tape.
Pretty easy to tell the difference between butyl and silicone. Butyl tape stays sticky and gummy forever. Exposed parts are always dirty because every little bit of dust or dirt sticks to it. It flows a little bit.
Silicone is slick, smooth, and clean. Once it's cured, it doesn't flow.
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