which pipe sealants

[bubblebobble]

Hi,

what does everybody use when for example they fix threaded adapters into engine blocks ?

The type of adapters that except coolant or oil hoses etc, usually a coarse thread.
I am thinking loctite 577 or Bondlock 577.

I know people use ptfe tape but Iam not a fan.
On disassembly I noticed a white paste, I figured it was like plumbers mate but an automotive type.

thanks