I'm replacing a faulty regulator on my gas grill. When removing the old regulator, I noticed there appears to be some sort of compound on the threads.
Here is a picture of the threads with the old regulator still partially attached:
And here is a picture of the threads without the old regulator attached:
- What is that substance, and where can I get it?
- Is it required in order to protect against LP leaks?
- Are there any tricks or gotchas to know about when applying it?