I have used the Subaru product in a couple of waterboxers and it sealed
the leaks very well. Small leaks in my case.

Mark

Stuart MacMillan wrote:
> I’ve read about that on the subaruvanagon site, but I doubt it can “condition” that rubber seal and the failed sealant.  It would likely take a lot for the 18 quart Vanagon cooling system anyway!
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> Thanks for the idea though.
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> Stuart
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> From: Dan N [mailto:dn92610@gmail.com]
> Sent: Saturday, December 19, 2015 5:18 PM
> To: Stuart MacMillan
> Cc: Vanagon Mailing List
> Subject: Re: Dreaded water jacket head gasket leak strikes
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> for now you may try this Subaru coolant conditioner
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> http://www.amazon.com/Subaru-SOA635071-Coolant-System-Conditioner/dp/B00IGZP2UE/ref=sr_1_1?ie=UTF8 <http://www.amazon.com/Subaru-SOA635071-Coolant-System-Conditioner/dp/B00IGZP2UE/ref=sr_1_1?ie=UTF8&qid=1450574144&sr=8-1&keywords=subaru+coolant+conditioner> &qid=1450574144&sr=8-1&keywords=subaru+coolant+conditioner
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> it's working well on my son's Jeep.. loss of coolant but no leak (internal leak)
>