I recently became a believer... previously I thought this "trick" was snake oil...
These instruction give you the gist of the "trick"... you can use the real tool,
some camera film, a thin feeler gauge, or... the real tool is pretty handy...
http://sealmate.net/seal_mate_instructions.htmlYou'd have to leak a long time to loose much fork oil... we ran the seal-mate
tool on my badly leaking fork in Wisconsin, and I made it back to South Carolina
without leaking anymore

-Mike