Originally Posted by mmazour
This is the purpose that I thought the butyl tape would serve, spacer as well as sealant, for both the screws and acrylic.
I think the major difficulty with your intentions (and what you plan may well work fine...) would be the assurance that the 795 would indeed penetrate fully under the acrylic up to the butyl to create that 'gasket'.
One other issue would be aesthetic.. despite the darkest smoked acrylic you will still 'see' any lack of uniformity in the material between the cabinside and the acrylic. I basically 'troweled' the 795 on so that we had full coverage of black 795 under the port light, tightened panel gently to avoid dimples as much as possible, then removed the excess before running the outer bead. Alternately you might consider painting the under-portlight area black first.
I'll be interested to see how this all works out if you proceed with the butyl/DC795 combo...