EcoSynic RV A/C Gasket Seal Kit — 14" inner / 17" outer, 2-Pack One-Piece Foam for Leak & Vibration Reduction

EcoSynic One Piece RV A/C Gasket is a universal, 14" inner / 17" outer roof seal kit that replaces worn gasket components to prevent leaks and reduce vibration for rooftop air conditioners in trailers, campers and motorhomes.

Replacing a cracked or compressed RV air-conditioner gasket is one of the simplest ways to stop roof leaks and improve unit stability. The EcoSynic kit supplies two complete gasket frames with one-piece closed-cell foam pads and both thick and thin gasket strips, so you can rebuild the mounting seal quickly with peel-and-stick installation. It fits most common rooftop AC brands and can be cut or adapted as a foam block or airflow divider for additional uses.

Will this gasket fit my RV air conditioner?

The EcoSynic gasket is designed around a 14" inner opening and a 17" outer dimension, matching the standard footprint used by many rooftop AC units. It’s compatible with popular manufacturers such as Dometic, Airxcel, Advent, Atwood and Coleman, and works as a direct replacement for many original parts.

• Inner size: 14" x 14"; outer: 17" x 17"
• Designed for common OEM mounting patterns
• Trim-to-fit foam can be cut for nonstandard openings

How does the one-piece design help prevent leaks?

Unlike multi-piece gaskets, this one-piece pad removes seams and joints where water can enter. The closed-cell foam resists water absorption and the adhesive backing helps create a continuous waterproof barrier between the AC unit and the roof surface.

• Continuous single-piece foam reduces leak paths
• Closed-cell material repels moisture and resists compression
• Strong peel-and-stick backing forms a reliable seal

Can I use the gasket to reduce vibration or improve cooling efficiency?

The kit includes foam strips and a solid pad that can be configured to add cushioning and help keep mounting bolt tension, reducing vibration and rattle. You can also combine the foam pad with aluminum foil tape to create a simple airflow divider that separates supply and return air paths for more consistent cooling performance.

• Foam block options help stabilize the unit and maintain bolt tension
• Gasket strips available in thick and thin for customized cushioning
• Works with tape to form a DIY airflow divider for improved efficiency

How easy is installation and what’s included in the package?

Installation is straightforward: clean the mounting surface, peel the backing, position the gasket and press firmly. The kit contains the parts you need to rebuild a rooftop AC seal for two units or to spare parts for one repair with extras for tuning fit and thickness.

• Package includes: 2 gasket frames, 2 one-piece gasket pads, 2 thick strips, 2 thin strips
• Peel-and-stick adhesive simplifies DIY installation—no special tools required
• Pad is easily trimmed with a utility knife for precise fitting

Who this is for: RV owners, DIY maintenance enthusiasts and service technicians who need a reliable, adaptable gasket solution for rooftop air conditioners. Choose this kit when you want a watertight, single-piece replacement that reduces vibration, is quick to install and fits most common RV AC units. It’s particularly useful if your original gasket is cracked, flattened or leaking and you prefer a durable closed-cell foam material that can be customized on the roof.