Cheap Concrete sealer/paint.
As per my "Home made grave marker" thread, I have made a headstone for a friends grave. I'd like to apply some kind of sealer or paint on it to give it some weather resistance. But all I can find comes in at least gallon size. Much more than I need. And more than I want to spend. Can anyone suggest a suitable substitute that can be obtained cheaply in a smaller size amount? THanks.