Poolife™ Thermal Shield provides a safe, non-toxic, invisible barrier on the pool surface that prevents heat loss and conserves water. Exclusive easy-to-use liquid formula is safe for all pool surfaces and compatible with all sanitizers, including chlorine, salt and biguanide. Forms a tough, invisible barrier that prevents heat loss and conserves water Reduces water loss by up to 40% due to evaporation Replaces the need for an expensive solar pool cover/reel Will not interfere with chemical balances Forms a tough, invisible barrier that prevents heat loss and conserves water Reduces water loss by up to 40% due to evaporation Replaces the need for an expensive solar pool cover/reel Will not interfere with chemical balances Poolife Thermal Shield is designed to be used in the pool throughout the entire swimming season. How to Use: Follow dosage chart How to Apply: Add directly to the surface of the pool Note: Shake well before use. Do notadd within 24 hours of shocktreating the pool. No down time! Safe to swimimmediately after application.