At Polymos, we understand the importance of protecting pools and spas from the rigors of winter. That’s why we offer closure kits designed specifically to guarantee maximum safety and durability. Our products, made from expanded polystyrene, provide effective thermal insulation, preventing cold penetration and minimizing the risk of cracks or damage to your installations during the colder months. Polymos closure kits are distinguished by their superior insulation with quality, durable materials.