Loctite 28 oz. PL 500 Landscape Block Adhesive. Loctite PL 500 Landscape Block Adhesive is an exterior, heavy-duty, premium quality adhesive designed to meet any landscaping need. It delivers a quick and easy solution to installing the final course of cap with landscape blocks and the installation of cement paving stones. Excellent for landscaping projects, such as securing block walls and capstones and for bonding brick, stone, timbers, concrete, metal and wood. Loctite PL 500 Landscape Block Adhesive formula may be used under a variety of moisture and temperature conditions ranging from sub-freezing to elevated temperatures and dry, wet or frozen materials. Provides excellent flexibility to compensate for the different expansion rates of dissimilar materials. It is particularly effective when bonding irregular surfaces or bridging gaps between surfaces. Low VOC formulation can be used in all 50 states. Waterproof and weather resistant. Use in temperatures from 0øF to 100øF. Not recommended for use on Applications over hygroscopic salt-treated wood, such as zinc chloride treatments; these substances attract, absorb and retain moisture. A ¬" (6 mm) bead extrudes approximately 85.8 ft (26.1 m). A 3/8" (9.5 mm) bead extrudes approximately 38.1 ft (11.6 m).