On Wednesday, October 30, 2013 10:20:11 AM UTC-4, John Galloway wrote:
Here is a good technical article. The two component process

mentioned in the article refers the Wx Seal and Wx Block.



http://www.wingsandwheels.com/Weather%20Block%20Tech.h

I have read testimony from other pilots here that this stuff works but this
still does not explain why (massive) fiberglass boats, which probably never get
waxed, don't crack. Is it because they don't flex?
I have a friend with an old ASW-19 in which the wings are really crazed but
the fuselage is not.