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

[E-bmw]

You should 100% only use PTFE tape on tapered threads. FACT!

Assuming what you are fitting has a seal/washer/o-ring etc you need nothing else.

[gazza285]

E-bmw said:

You should 100% only use PTFE tape on tapered threads. FACT!

Assuming what you are fitting has a seal/washer/o-ring etc you need nothing else.

What you got against PTFE string?

[E-bmw]

PTFE tape string whatever is designed to be put on the threads & be compressed by the threads as they engage more & more until it fully takes up the gap between the two.

That is not what happens on a parallel thread, it just gets pushed out & still leaves uncompressed tape and subsequently unsealed threads.

It is quite simply not for parallel threads, I have nothing against it at all in it's rightful place & in fact use it daily exactly as described.

Use the right thing for the job.

[Captain Answer]

Loctite 577 is good stuff, used that previously on sealing some troublesome fuel line connectors where the unions just weren't making a good enough seal