Spray foam around joints under home

[jasonksizemore]

Ok, just had a crazy idea after reading a post in the repair section regarding this wonderful stuff. Seeing as I have sealed as much as I can reach of my trunk line but still have minor leaks at almost every section where goes from trunk, up to register, could I use either of the foam insulation cans to try and fill the gaps, also, how about using cautiously around inside of registers??? My water line replacement project went fairly well last week, I am PB free and 100% PEX!!!! Ready to replace insulation and close belly wrap but wanted to know about this before closing all up.
Thanks for your help.
Jason

[Robert]

Mastic Duct Sealant would be better and foam weather stripping and foil tape at registers.


However, you could try it and see if it helps.



Thanks,
Robert