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This replacement RV skylight is thermoformed from white polycarbonate, giving you a durable, UV-resistant dome that lets daylight into the cabin without adding much weight to the roof. It's built to match the common 18 x 18 inch rough opening size used across many RV roof cutouts.
It ships with care and installation instructions along with a tube of approved elastomeric sealant, so you have what you need to bed the flange and seal out water once it's positioned over the opening.
A straightforward way to replace a cracked, yellowed, or leaking RV skylight without a full custom fabrication job.