BSI Winterproof is the ideal solution for winterizing your pool. This product allows you to retain water in your pool during the winter, saving you water consumption and preventing it from getting dirty. Furthermore, BSI Winterproof ensures your pool is quickly ready for use in the spring. This product is effective at low concentrations and provides long-term protection against stubborn precipitation and fouling. Please note: BSI Winterproof is not an antifreeze and will not protect your pool from frost. Specifications: - Retains water in your pool during the winter - Saves water consumption - Prevents pool fouling - Makes your pool quickly ready for use in the spring - Effective at low concentrations - Long-term protection against precipitation and fouling - Not an antifreeze, does not protect against frost