Hey Michael,
You do not want to use self-leveling sealant with the Specialty Recreation Universal Replacement RV Skylight - 14" Wide x 22" Long - Smoke # SR67RR because it is made from polycarbonate, which doesn't mesh well with that type of sealant and can cause crack. The skylight does come with its own sealant, which you'll want to use when installing it. view full answer...
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