JUNE JLC 1999 Products JLC' s Products by Dave Crosby Clean Caulk Offering better adhesion to more materials, higher tensile strength, and a cleaner installation than silicone, this highly elastic, weather-resistant caulk will not stain surfaces or pick up dirt as it ages, according to the manufacturer. Available in ten standard colors, the paintable, low-VOC, low-odor Sonolastic 150, with a service temperature range of -40°F to 220°F, is said to exhibit the best properties of polyurethane and silicone, but at a lower price. Not for sale to the general public, this professional-duty caulk sells for $6.56 for a 300-milliliter cartridge and $10.63 for a 20-ounce propak tube (also available in 2-gallon pails for $160). Contact: Sonneborn, 889 Valley Park