Caulk / foam sealant compatibility with Zhender ComfoFlex ducts – GreenBuildingAdvisor

I have a bunch of Zhender ComfoFlex 3” ducts (all inside conditioned space) that I have penetrating walls/floors where for acoustic reasons I’d like to seal them into the opening (one per duct) that they penetrate.

For most things, wire/plumbing pipe etc., I can just caulk (Big stretch) or foam (e.g Loctite low expansion foam) them into a hole to minimize air/sound leakage.

I don’t know if  anyone has come

across guidance from Zhender on compatibility with ComfoFlex?  

Thanks in advance!