Tough-Seal 21 of the Key Polymer Corporation offers high quality epoxy encapsulants and compounds for your industrial needs. Tough-Seal’s epoxy encapsulants serve the function of providing insulation from all kinds of weather and high and low temperatures for your electrical devices. Key Polymer has been providing the encapsulant customers need to the specification requested for the past 45 years. Order a Tough Seal evaluation kit to ensure your epoxy encapsulant is the quality you want. When you order, Key Polymer and Tough-Seal items are specially packaged. For more information and to contact Key Polymer and Tough Seal write to 17 Shepard St., Lawrence, MA 01843, or call 978-683-9411, or please call toll free at 888-KEYPOLY.