you can buy it at any auto store. Depending on the type of RTV you buy it is used as a gasket sealer, or you can actually use RTV as a gasket. I wouldn't recommend using it as a gasket on your valve cover though. It would look messy and is probably not as good as the rubber gasket. Just get some to seal around the distibutor lip and on the other end near the cam gear(s). If you are looking for good paint to paint your cover with, I painted mine with Duplicolor (METALCAST). I had to order it through NAPA, cuz they didn't stock it on the shelf but some stores stock it. It's about 6 bucks a can and I used about a can and a half, plus a half a can of ground coat. Paint doesn't peel or chip at high temp and looks awesome.