Lewmar 360378999 Ocean Hatch Replacement Seal Kit Size 65

The Lewmar 360378999 is a genuine OEM replacement seal kit designed specifically for Lewmar Ocean Series deck hatches in Size 65. This exact-fit gasket restores watertight integrity to aging or compromised hatches, keeping water, drafts, and spray out of the cabin interior.

Lewmar's Ocean Hatch Seal Kit features a unique adhesive-free sealing system that secures the acrylic pane directly into the hatch frame channel. The gasket is manufactured from high-performance, UV-resistant marine-grade polymer engineered to withstand continuous saltwater exposure, sunlight, and extreme temperature cycling — maintaining long-lasting elasticity and a consistent compression seal under offshore conditions.

Key Features:

• Genuine Lewmar OEM replacement seal for Size 65 Ocean hatches
• Adhesive-free, petroleum-free installation — no messy sealants required
• UV-resistant marine-grade polymer construction
• Engineered to resist saltwater, sunlight, and temperature extremes
• Restores factory-fit compression to eliminate leaks, drafts, and water ingress
• Shaped specifically for the Lewmar Ocean Hatch frame channel for a perfect fit
• Compatible with Lewmar Ocean Series hatches in Size 65

Over time, hatch seals can compress, harden, or degrade, leading to drips and drafts — particularly on forward-deck hatches exposed to heavy spray. Replacing the seal with this genuine Lewmar part brings your Ocean hatch back to factory-level weather protection and helps safeguard cabin spaces, cushions, and electronics from moisture damage. Part number 360378999 is confirmed in the Lewmar Ocean Hatch Seal series for Size 65.