Hah.... stole my thunder. I was going to suggest this.
I've always been hesitant with primers but I can see the argument here. Lets take a look at this for a second and see how it works out for the customer.
Using our
TL015 as an example and mid-line coverage, you would need three gallons per coat. So that's 360 dollars -- less GJ7 coupon code. Obviously make sure you grind first. You could actually do a high solids epoxy as a primer, in a single coat for a little less
http://www.garageflooringllc.com/high-solids-garage-floor-epoxy/ and still have a better mill thickness. (remember the coverage is per gallon and you are using a 1.5 gallon 'kit' We have industrial applications and high build projects where this is used for this exact purpose.
A 5 gallon of
Rust Bullet would be closer to 549.99 -- less discount. Advantage, no grinding. "Disadvantage" you are not going to put epoxy on top of it later.
You could add flake and clear for [additional] $409.96 to the Rust Bullet and have the look you wanted originally for under $1000
Getting back to Shea and Scotty's point, if you are looking for a quick way to protect the floor and finish it later the primer is a very cost effective option. Just make sure you do the prep.