650 LT Liquid Adhesive is a rubber-based adhesive in solvent solution which is specifically formulated to provide excellent adhesion with the Polyguard® waterproofing membranes under many kinds of surface conditions. It is designed for use as a primer for all structural concrete, masonry, or wood surfaces on which waterproofing membranes will be applied, and can be installed on applications down to 25°F (-4°C).