Pro Dope turning green on brass fittings?

[Grizzle]

2-1/2 years ago, I used Hercules Pro Dope on a brass assembly for my main water supply (pictured).

Recently, I noticed the dope around the joints is turning green. No leaks, but the valve box does trap humidity (the little black box is a temp/humidity sensor).

Is it normal for the dope to (apparently) cause corrosion? What's the deal?

 

[WorthFlorida]

It's not corrosion, it's oxidation. For most brass fittings pipe dope is not required nor recommend on brass fittings.

 

[Sponsor]

 

[Grizzle]

It's not corrosion, it's oxidation. For most brass fittings pipe dope is not required nor recommend on brass fittings.

Good to know. Would a decent teflon tape be recommended instead? I designed it to be easy to remove and rebuild, if necessary.

 

[WorthFlorida]