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I want to seal outdoor AC lines. I have a gap. Is it safe to use gap filling foams? Is it flameble with the copper tube

Scooby doo
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    Or this? [What is the correct way to seal/flash coolant lines through siding?](https://diy.stackexchange.com/questions/81395/what-is-the-correct-way-to-seal-flash-coolant-lines-through-siding) – isherwood Oct 10 '23 at 19:47
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    Or this? [What should I use to seal the hole where my central air enters the house?](https://diy.stackexchange.com/questions/91744/what-should-i-use-to-seal-the-hole-where-my-central-air-enters-the-house) – isherwood Oct 10 '23 at 19:48
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    Or this? [Is sprayfoam suitable for a waterproof seal around AC lines through external wall penetrations?](https://diy.stackexchange.com/q/282772/35141) – isherwood Oct 10 '23 at 19:49
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    Welcome. Please take the [tour] and be sure to search before you ask. – isherwood Oct 10 '23 at 19:49

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