If you read the can, it addresses only 2-3 coats. The fact is, you need to use more than that. I used different width painters tape, taped off a decorative 3x4 (approx) space and the used the entire can. Every hour or so, I'd add another coat. When I'd used the entire can and let it dry/cure for 2 days, I then applied 2 good coats of chalkboard paint over the top. My magnets stick even with those two coats over the top of the magnetic primer. I think that anyone who approaches this product thinking it's going to have the same magnetic hold as the side of their fridge is delusional. LOL It's a craft kind of thing...not an industrial kind of thing. I would suggest Rare Earth magnets, although our other magnets stick just fine. Now, you won't be holding up a phone book with this primer, but it DOES work....just not with only 2 or 3 coats. And we found that the more time passed, the better the magnetism was. Not sure if that's reality or our perception, but we're loving it !!