Description: Sliding gasket AT3916
The AT3916 sealing profile is designed for integration into the upper guide rail of the companionway hatch system on CNB 66 (6LA) and CNB 76 (7X) sailing yachts. This component plays a crucial role in the NOVAL system (reference NL1201), ensuring smooth panel movement while maintaining protection against external elements.
It works in conjunction with other sealing components (such as AT1113) to optimize the overall functionality and water-tightness of the companionway system. The AT3916 is typically installed along the upper sliding path of the horizontal panel, ensuring silent and friction-reduced operation.
Made of marine-grade elastomer, this gasket offers excellent resistance to UV exposure, salt spray, and mechanical wear. Its dimensions (7 mm x 6.9 mm / 0.28″ x 0.27″) make it suitable for precise insertion into the designated upper track of the hatch frame.
This discreet yet essential component helps maintain the integrity of onboard sealing, particularly in the upper movement zone of the sliding door system.
Note: Although very similar to AT1113, the AT3916 is mounted in a distinct location and should not be interchanged.
Specifications
- Product reference: AT3916
- Type: Upper track sliding seal
- Dimensions: 7 mm (height) x 6.9 mm (width) / 0.28″ x 0.27″
- Weight: 0.12 kg / linear meter (0.081 lb / linear foot)
- Compatibility: CNB76 (7X), CNB66 (6LA)
- Material: Marine elastomer (resistant to UV and salt)
- Resistance: Freshwater, saltwater, UV rays, friction, abrasion
- Supply: Sold by the meter (3.28 ft)
Installation / Maintenance
Installation:
The AT3916 gasket is inserted into the upper track of the sliding panel mechanism. Ensure the groove is clean and dry before installation to guarantee optimal function. A small amount of silicone lubricant can help ease the initial fit.
Maintenance:
- Wipe regularly with a damp cloth to remove salt and dirt.
- Use silicone spray for lubrication and noise reduction.
- Operate the hatch a few times post-lubrication to distribute product evenly.
- Visually inspect the gasket during annual maintenance routines.
Our review
✔ Pros
- Durable under marine conditions (UV, salt, movement)
- Precision fit for the upper companionway track
- Easy to install and maintain
- Essential for fluid panel sliding and seal continuity
✘ Cons
- Dedicated to the upper zone only — not interchangeable with AT1113
- Requires partial access to the sliding rail for replacement
Conclusion
The AT3916 seal is a vital element of the NOVAL NL1201 hatch system, ensuring proper alignment and protection of the sliding panel’s upper guide path. Reliable and durable, it contributes directly to the longevity and efficiency of the companionway’s operation.
Good to Know
- We recommend keeping at least one spare meter (3.28 ft) of AT3916 on board in case of unexpected wear or during scheduled maintenance. Do not substitute with AT1113 — each seal has a specific placement and purpose.
- The AT3916 is one of the original components of the NOVAL reference NL1201 system, along with parts such as: NL2070 (digital key control box), NL1290 (interior keyboard – manual version), NL1288 (keyboard panel – motorized version), AT7382 (stainless gas strut), AT5964, AT5186, AT5121-PO7X (vertical belt), and AT5121-PA7X (horizontal belt).
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