The current pre-cats are almost trouble-free when used properly. Most are supplied ready to spray and are almost as forgiving and versatile as nitrocellulose and acrylic lacquers that they replace. They now have good shelf life, generally no pot life issues, flow and dry well and work well with the stains, glazes, toners, grain fillers, colorants and other additives you normally use. They can be used as a sealer, but catalyzed or uncatalyzed vinyl sealers are usually recommended for enhanced moisture resistance as required by Kitchen Cabinet Manufacturers Association standards