Keep this in mind. If the sealing surfaces are good then there is no reason for sealer to be used. Please I cannot stress that enough. Man it becomes a mess and makes a mess at the same time. We have had no luck with it. I am sure that others do, but a oring seal is one of the best ways to seal any surface that is fitted like a model engine is. Carb into case, backplate into case. You get the idea. Feel the orings look at them if they have flat spots replace them I know you will more then likely have to order them or something but it will prevent a large mess with sealer that will just fill the gap that the oring should be in. And when the fuel hits it depending on the sealer used may not stay may disove as nitro is highly corrosive.