Profile: Long Floor & Horizon Forest Products specializes in pre-finished & unfinished hardwood flooring, floor equipment, abrasives, finishes, fasteners and accessories. Liquid Nails™ is a waterproof, trowel-grade adhesive with hold and long working time for precision placement of flooring. It is ideal for installing hardwood flooring, wood planking & wood parquet to concrete, wood, plywood and resilient tile surfaces.