dude, if you got a redline, stop worrying about weight or you will soon not be able to sleep...

but i can't imagine it adds more than a couple ounces.

this here is the stuff:



JP Weigle's Frame Saver
Modern steel frames have thinner tubes and often develop internal rust problems. Left untreated, rust can rapidly degrade an expensive frame from the inside. Frame Saver is easy to apply and will protect your frame from internal rust. Simply spray into open tubes and let dry. Designed for steel or cro-moly bicycle frames but widely used for general rust inhibiting on road and marine equipment, yard machinery and household items. Quickly gets into enclosed areas and prevents rust from forming. Will not harm painted, clear coated, or bare metal finishes. A 4 ounce (132 ml) aerosol can provides 3 to 5 frame applications. Ideal for use on all old or new frames. Safe to apply over light rust. We recommend it as inexpensive insurance for all steel frames. Proudly made in the USA.




i'd bet the bikeshop would do it for next to nothing since you just bought the bike there...