Star Brite 4oz Epoxy Putty Stick - Make Fast, Permanent Repairs - Even Underwater Works underwater! Every boater should have this onboard for emergency and permanant repairs Easy to use - hand knead for 1 minute and apply to damaged area Bonds in 5-10 minutes - Steel hard in 30 minutes Fully cured in 60 minutes and can then be sanded, drilled and tapped Special additives cut through oxidation and anodization to maximize bonding to weathered aluminum Withstands high temperatures and pressures making it ideal for manifolds, mufflers, & drive units