No boat should be without as this can be the product that saves you from sinking. You never know when a thru hull fitting will get knocked off or a manifold will blow. This epoxy stick can save the day and maybe the whole trip by makingpermanent and emergency repairs on fiberglass, wood, metal and plastic.FeaturesEasy to use just hand knead until color turns white and apply to damaged areaCan be sanded, drilled and tapped