2.5.1 Saddle Installation Introduction

Seakeeper recommended adhesives are listed in TB-90382 – Structural Adhesives Recommendations. Seakeeper recommends using a structural adhesive with a lap shear strength of 2000 psi (13.8 MPa) or greater. Careful consideration should be exercised by the installer when selecting the appropriate adhesive, such as working time, material compatibility, and surface preparation are three important factors to consider. Proper surface preparation in accordance with the adhesive manufacturer’s recommendations prior to installation is critically important. Information regarding pot-life, structural properties and material compatibility can be found on the adhesive product’s technical data sheet (TDS). An etching/cleaning primer compatible with the adhesive should be used on all aluminum surfaces if recommended by the manufacturer. Typically, two-part methacrylate based adhesives are the best options for bond-in installations such as Plexus MA590 and Sci-Grip SG300, which provide compatibility with aluminum and FRP substrates, adequate working time, and exceed the strength requirements. See Sheet 5 of Seakeeper Drawing No. 90399 – Seakeeper 5/6 Bond-In Installation Details, for loads information and recommended adhesive properties.