The KeelGuard is a protective layer designed to prevent damage to boat hulls, particularly the keel area. Installation involves a specific sequence of surface preparation and adhesive application to ensure a strong, lasting bond. This article details the recommended installation procedure, considerations for different boat types, and the benefits of using a keel guard, based on available documentation. The KeelGuard is applicable to both aluminum and fiberglass boats, as well as personal watercraft.
Understanding the Purpose of a Keel Guard
A keel guard serves several important functions. It prevents costly repairs resulting from damage to fiberglass or gelcoat, potentially increasing a boat’s resale value. By protecting the keel, the guard contributes to the long-term structural integrity of the vessel. While requiring initial installation, a keel guard is designed for low maintenance and extended protection.
Preparing for Installation
Proper preparation is critical for successful KeelGuard installation. The process consists of four primary steps: etching, cleaning, priming, and applying the guard. The average installation time is estimated to be between 45 and 60 minutes, dependent on the length of the KeelGuard being installed.
Surface Preparation Details
The initial surface preparation involves thorough cleaning and treatment. The documentation specifies cleaning with acetone, followed by sanding the surface. After sanding, the area should be scuffed with a Scotch-Brite pad and then wiped down with alcohol to remove any residual dust. This multi-stage cleaning process ensures optimal adhesion.
Priming the Surface
Following cleaning, a thin coat of 3M #94 keel primer must be applied. The primer is applied using a sponge applicator, ensuring the applicator remains wet during the process. Complete coverage of the area where the KeelGuard will be installed is essential, with particular attention paid to the edges. The primer interacts with the adhesive to create a bond that strengthens over time. It is important to note that the primer is not a cleaning agent and should not be used as such.
KeelGuard Application Procedure
After priming, the KeelGuard itself can be applied. Before application, the KeelGuard should be unrolled and set in the sun for approximately 10 minutes. Installation should not be attempted in temperatures below 60 degrees Fahrenheit. The KeelGuard features a protective red plastic liner, scored 1-inch wide down the center to aid in centering the guard during application.
Applying the Adhesive
The KeelGuard utilizes a 3M adhesive system. Activator wipes are applied to the keel to trigger the adhesive. The guard is then pressed onto the primed surface, starting from the center. A roller should be used to apply even pressure and ensure a solid seal.
Sealing the Edges
To further protect the bond and prevent water intrusion, a bead of marine-grade caulk is applied to the 1/4-inch gap between the KeelGuard and the hull. This caulk should be smoothed out and any excess cleaned up. Once the caulk is cured, the installation is complete.
Positioning and Length Considerations
The typical mounting position for a KeelGuard is 4 to 6 inches above the waterline on the bow. The guard should extend at least 2 to 3 feet beyond the lowest point of the keel. For boats requiring protection above the bow eye, a separate Bow Guard, available in lengths from 1 to 3 feet, can be used. A stainless steel bow protector is also available to prevent damage from trailer rollers or V braces.
Personal Watercraft (PWC) Installation
Installation on personal watercraft requires specific attention. The KeelGuard should begin approximately 1 inch below the bow hook and run the length of the keel, ending 4 to 6 inches forward of the pump intake. Caution is advised regarding proximity to the pump intake, as installing the KeelGuard too close may cause cavitation on some PWC models. Newer PWC designs with stepped hulls may require shorter KeelGuard lengths; contacting Megaware KeelGuard is recommended to determine feasibility.
Additional Considerations
The documentation notes specific considerations for new boats, aluminum boats, trailer rollers, anti-fouling paint, and boat bottom paint. While details regarding these considerations are not fully elaborated upon in the provided materials, adherence to all instructions is emphasized to ensure the full bonding capabilities of the 3M adhesive are achieved. Shortcuts or missed steps may compromise the installation.
Conclusion
The KeelGuard offers a preventative measure against hull damage, potentially saving boat owners significant repair costs and maintaining the vessel’s value. Successful installation relies on meticulous surface preparation, proper priming, and careful application of the adhesive-backed guard, followed by sealing the edges. Specific considerations apply to different boat types, particularly personal watercraft, and adherence to the manufacturer’s instructions is paramount.