Oversized the holes so as to allow room for expansion and contraction of Lexan (polycarbonate) around each fastener.
Made a mistake. Started to wipe right edge of Lexan (polycarbonate) prior to installation. Noticed cloudiness.
Learned too late that this staining is irreversible. Decided that I could live with this cosmetic flaw and continued.
Dow Corning 795 Silicone Building Sealant
Installed fasteners snugly, but not firmly.
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