As far as the case hal gaskets I personally do not use any sealer, only the gasket I just make sure the halfs are very clean. And the base gasket(cylinder gasket) it depends if I use a gasket I do not use sealer but if I have the clearance on the piston and top of cylinder I use permetex anerobic sealer with no gasket. This will give you a little more compression if you have the clearance. Some may disagree with me but I have done several saws like stated and have never had any trouble with them. Hope this helps