IMO:
Since they’re both Sealants; and in order
to get first-hand feedback; there are two
ways to approach “using them together”:
two “Test Spots”, as it were.
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-First, pick a panel (such as a hood) that is
as free and clear of contaminates as possible
to use as the recipient of the “Test Spots”.
-Next, apply either one of the two Sealants
(your choice) to 1/2 of the panel.
-Then, apply the other of the two Sealants
to the other remaining 1/2 of the panel.
Now...
-To get the most of the benefits that Sealants
have to offer, it has, most often, been a Best
Practice to allow them to have a cure-time in
a dry environment. (It’s one of those processes
that has a wide range—varying, believe it or not,
anywhere between a 1-24 hr time period!)
-In this situation, let’s go for at least 8-12
hours, if at all feasible.
(If not feasible? Give it your best shot...)
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After the allotted cure-time is completed,
apply the two Sealants to the panel halves
in the reverse order that they were originally
applied. Make note of their ease of application,
etc., etc.
After another obligatory cure-time...
“the tale of the tape” should be readily
observable to the eye-of-the-beholder.
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Hope this helps in answering your
thread-starter’s inquiry.
Bob