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Proflex (geocel) bonding to butyl?

chilly81
Explorer
Explorer
I'm in the process of resealing things on my trailer.

I have corrugated aluminum siding. The corner trim to siding joint unavoidably large gaps (1/4") in the low spots because of the corrugated shape - and those gaps are pretty well filled with putty/butyl.

I seem to read things about trimming back excess putty/butyl and topping it with geocel proflex. This seems great for windows etc, but for the big gap corner seals, where there is really no surface besides the butyl itself for the caulk to adhere to, it seems like it wouldn't be able to stick and last.

It seems counter intuitive to me, so just wondering what people have done.
1 REPLY 1

chilly81
Explorer
Explorer
Hmm... dumb question?

Maybe I should rephrase or focus it.... Do people who redo the putty/butyl on corners (where it fills larger gaps than with other fixtures) top the putty with something like geocel proflex caulk?