These two products are excellent for sealing up everything on the waterboxer.

I have used Loctite and Permatex versions of the same 518.
Both work very well.
I have not had a leak at the rear heater core flange since using this product.

The Right Stuff seems to be the answer for head gaskets.

________________________________
From: Benny boy <huotb@VIDEOTRON.CA>
To: vanagon@GERRY.VANAGON.COM
Sent: Fri, March 5, 2010 8:40:01 PM
Subject: Re: Loctite 518 uses on Vanagon?

It's now Permatex 51813, maybe your confusing 51531
http://www.permatex.com/documents/GasketMakerSelector.pdf

The tube is blue but the stuff is red.

That with The Right Stuff is all I use in the shop.

Where, mostly on coolant flange on top of using the cheap Reinz paper gasket.

Ben
http://www.benplace.com/vw2.htm