XMK 18" x 26" RV skylight outer dome — fits 14" x 22" opening, UV-protected polycarbonate, impact-resistant

XMK's 18" x 26" outer skylight dome is a direct replacement cover designed to fit standard 14" x 22" RV openings, made from thicker UV-protected polycarbonate for weather resistance and lasting clarity.

This replacement skylight outer dome provides a durable, lightweight option to refresh or repair the roof aperture in campers, motorhomes, travel trailers and fifth wheels. Built from impact-resistant polycarbonate and finished with a UV protective coating, the cover brightens interiors while helping block harsh solar heat. The larger 18" x 26" outer flange is sized to overlap roof cutouts and offer solid sealing surface for installation with standard skylight sealants.

Will this cover fit my RV skylight opening?

Yes — the product is made to suit the common industry cutout size of 14" x 22" with an overall outer dimension of 18" x 26". The outer flange gives enough material to sit on the roof and accept fasteners or sealant around the perimeter. Always measure your existing opening and flange clearance before ordering to confirm compatibility.

• Fit: matches 14" x 22" internal roof openings
• Outer dimension: 18" x 26" for proper overlap
• Pre-drilled hole locations provided for mounting flexibility

How tough and weatherproof is the XMK skylight dome?

The dome is molded from thicker polycarbonate engineered for outdoor use, offering impact resistance and high-temperature durability. A UV protective coating reduces long-term sun damage and helps preserve clarity. While robust, it still benefits from proper installation and sealant to prevent leaks under heavy weather.

• Material: thicker polycarbonate for strength and light weight
• Finish: UV-protective coating to slow discoloration and degradation
• Performance: resists heat and impacts better than standard acrylic

What light and heat control options are available?

XMK offers multiple tint choices so you can balance daylight with solar filtering. Clear and white let the most natural light through, while smoke gray, tawny, and dark blue tints reduce glare and filter summer heat. Choose the shade based on climate and how much direct sunlight you want entering your RV space.

• Clear/white: maximum natural light for bright interiors
• Smoke gray/tawny: reduces glare and filters solar heat
• Dark blue: aesthetic tint that still admits daytime sky views

How easy is installation and what do I need?

Installation is straightforward for someone comfortable with basic roof work: the dome is lighter than glass, includes pre-marked mounting holes, and needs a skylight-rated sealant to create a weatherproof bond. You may need a screwdriver, sealant gun, and a ladder; consider assistance for safe handling and alignment.

• Included: pre-marked drill/mount locations to simplify fitting
• Recommended supplies: skylight sealant, screws, basic hand tools
• Tip: test-fit before final sealing to ensure correct hole placement

Who is this for: The XMK 18" x 26" outer dome is ideal for RV owners, DIY renovators and repair shops replacing worn or cracked skylight covers on campers, travel trailers, motorhomes and fifth wheels with a 14" x 22" roof cutout. It suits users who want a lighter, more impact-resistant alternative to glass, with tint options to control interior light and heat. If you value long-lasting outdoor materials and a straightforward retrofit with reliable sealing surface, this skylight dome is a practical upgrade for brightening and protecting your RV interior.