Kilz Pro-X is an interior latex paint line that is engineered for professionals. Available exclusively at The Home Depot, the product will be offered in two series: A high-quality 300 Series offering premium performance with an environmental edge and an economical 100 Series production-grade collection for ceilings and walls. Cost: $16.97 per gallon to $123 for 5 gallons.Masterchem Industries.877-776-3961. www.kilzprox.com.