Please forgive me if this question has been asked before. In the catalog under the 2K regular build primer, it says "A sealer is not required for this primer prior to painting." It doesn't say that on the 2K high build primer page, or the Turbo 2K high build primer page. I'm wondering if those two primers require a sealer. I'm planning to use the Turbo 2K on a complete paint job, block sanding with 500 grit, and would rather not have to seal it.