I have been pricing resin and hardener to use the injection method to repair soft spots in the decking of my H16. I have seen it as high as $66 a gallon for West System Resin and as low as $25 a gallon for resin and hardener combo pack at an automotive store. They both seem to have the same ingredients, and the stuff at the auto parts store even has a picture of a boat on it. Does anyone know if there is a real difference?

Chris Bond