A Heavy Duty Sub-Floor Adhesive for projects such as sub-flooring, exterior sheathing and siding. Bonds most common building materials such as plywood, wood, furring, chipboard, masonry, metal, wet and frozen lumber, pressure treated lumber etc. Provides permanent bond within 48 hours and results in a solid, unitized floor with the advantages of I-Beam construction. Ideal for interior/exterior use. Not damaged by freezing.