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Best way to seal exterior conduit – GreenBuildingAdvisor
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krackadile | | #1
When I installed a minisplit they sent a clay like substance similar to plumbers putty that I used. It was covered by a type of escutcheon plate that came with the penetration sleeve. There’s always spray foam or caulk as well. I’d just plug it up with whatever you have that will last outside. Then cover it with an escutcheon plate or trim for good measure.