For rats and other rodents, plastics are a popular menu item. Techmer Polymer Modifiers (www.techmerpm.com) has come up with a polymer additive that keeps these pests from nibbling on important plastics. The company's PM 12211E63 Repellent imbues polyolefins and other thermoplastics with a taste that rodents find repulsive. At the same time, the modifier is non-toxic to pets—as well as the rodents themselves. PM 12211E63 has seen use in wire and cable insulation, fiber-optic cables, plastic pipe, garbage containers, agricultural films, and outdoor furniture.