Foundation is a premium primer that protects interior and exterior wood surfaces ahead of the construction phase. The environmentally friendly water-based product extends the life of finishes and protects against ultraviolet radiation. It ensures dimensional stability, repels water, and improves top coat performance. Cost: $73.25 for 1 gallon or $336.80 for 5 gallons.Sansin Corp. 877-726-7461. www.sansin.com.