Not sure I see the point of an A/C sealant anyway. If your A/C is leaking, it's 99 percent sure it's coming through something rubber, right? And if it's doing that, the rubber is cracking and the hole is not going to get smaller. Even if the sealant works just as advertised and harms nothing, it seems to me you're only buying a few months before the crack gets big enough that nothing will seal it and you're stuck replacing it all anyway.

Reminds me of the Jaguar guys, back in the good old British Leyland days, when they decided that every time they serviced a cooling system, they'd chuck in some radiator stop-leak. Stuff built up in the bottom of the radiators until they had cars that couldn't keep themselves cool.

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Finn John -- Albany, Ore.
www.offbeatoregon.com
76 Merc 300D, sky-blue, *86k, for driving
84 Jaguar XJ6, black, 245k, for restoring someday
71 Merc 408, 2.3 petrol 4, Avon caravan conversion (UK), RHD