A recent lighting forum question dealt with protecting gel filters. The response was pretty encouraging! Please click on Guest if you are not a member of Light Network to read the comments.
Apollo Gel Shield
From The Horse's Mouth
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August 23rd, 2010 on 3:20 pm
Gel Shield has been one of our best performing products in delivering heat protection and extended life to gel. It blows the competition away!!! Don’t believe me, test it yourself