AcornWoodpecker t1_j28ygyg wrote on December 30, 2022 at 2:43 PM

Maybe put some weather strip in first then caulk over? I'd probably look into plumbers putty as another option that can take caulk over it.

Shmeepsheep t1_j2b301f wrote on December 30, 2022 at 11:05 PM

Plumbers putty will dry up and crack away of used to fill that gap, won't provide a water tight surface, and would take a lot to fill that. Backer rod would be the appropriate backing for silicone, not caulk

AcornWoodpecker t1_j2cf7ms wrote on December 31, 2022 at 5:16 AM

Yeah, backer rod is what I was thinking. It's basically the same thing as the weather strip tubes, different sections of the store for sure.

I guess I grew up using caulk as a general term for anything that covered a joint, be it silicon or traditional stuff. OP should choose their goop for their situation.