This Catalina 42 mast boot fits a spar that has a mast track for a spinnaker car extruded onto the forward face of the mast. Later boats' spars did not have this feature and require a different mast boot.
This boot can only be installed while stepping the mast.
Maintenance: To clean use a good detergent, acetone or denatured alcohol. For stubborn stains use MEK solvent. The above cleaning should be followed by a vinyl cleaner like Meguires Heavy Duty Vinyl Cleaner. After restoration or when installing a new boot, apply a coating of Meguires PolyProtect and Vinyl Conditioner or ArmorAll to improve resistance to staining and dirt accumulation and assist in prolonging the life of the plastic.