Addendum
I spoke with my wife, who is a licensed esthetician and she recommended:

Epicuren Lip Balm - comes in stick or tub forms, spf 15 - no petroleum.

Another is Zilactin-Lip, also in stick form - indicated for sun blisters, dry, chapped lips and cold sores. spf 24 - no petroleum Zila Pharmacueticals I was not able to verify the existence of the product although, interestingly, thay are marketing the "Viz Lite Plus" for oral cancer detection http://www.vizilite.com/

Gary Allsebrook
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Dx 11/22/02, SCC, 6 x 3 cm Polypoid tumor, rt tonsil, Stage III/IVA, T3N0M0 G1/2
Tx 1/28/03 - 3/19/03, Cisplatin ct x2, IMRT, bilateral, with boost, x35(69.96Gy)
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"You are a mist that appears for a little while and then vanishes" (James 4:14 NIV)