good sealant that isn't hard to remove?

what is a good sealant to make things air tight but isn't too hard to remove? There is some kind of putty right? But I'm not sure what it is called.

TIA

maybe silicon? You can scrape it off pretty easy.

Plumbers putty, duct seal, or butyl tape... Really depends on the application

Herb & Suds said:

https://www.lowes.com/pd/Gardner-Bender-16-oz-Duct-Seal/4595233?cm_mmc=shp-_-c-_-prd-_-elc-_-ggl-_-LIA_ELC_106_Tools-Wire-Connectors-_-4595233-_-local-_-0-_-0&ds_rl=1286981&gbraid=0AAAAAD2B2W8IlJOo3TfvRtLi3UKP6oIj1&gclid=EAIaIQobChMI2YOn572o9QIVtBNMCh3FkQVWEAQYASABEgKQMvD_BwE&gclsrc=aw.ds

Click to expand...

Never seen it like that... Only ever bought it in bricks.
Great for sealing wires in pvc pipe

Edit, I see now. Yes that is the stuff

natureboygrower said:

View attachment 5064403

Click to expand...

I asked about this stuff once in the depot and they looked at me like I was crazy. I forgot all about it. Thanks for reminding me!

Thanks all. Good ideas.