Bostik 1 Gallon Roll-Cote High-Performance Moisture Vapor Barrier Coating and Primer, $149.99 USD/Box, LL Flooring (Lumber Liquidators)

Bostik's Roll-Cote provides a high-performance barrier for moisture vapor and acts as a primer. Available as a 1-gallon option, it is priced at $149.99 per box.