How thick can TotalBoat Polyester Structural Repair Putty be applied? Eric Boudreau April 01, 2022 14:53 Updated There is no maximum thickness for TotalBoat Polyester Structural Repair Putty. The amount of MEKP catalyst should be proportionally reduced for larger masses and thicker applications to prevent the reaction from building up excessive heat. Related articles Can TotalBoat Polyester Fairing Compound be used below the waterline if top coated with gelcoat? Can I apply TotalBoat TotalFair over gelcoat? Can TotalBoat Polyester Fairing Compound be thinned? What is the maximum useful temperature of cured TotalBoat Polyester Structural Putty? Can TotalBoat TotalFair be applied directly over polyester laminating resin? Comments 0 comments Please sign in to leave a comment.