Professional Grade Safe-T-Plus® Plant & Concrete Care Formula Windsor® Safe-T-Plus® is a premium ice melt that contains a sealing agent to help minimize concrete damage and compounds that promote plant growth, making it safer for concrete and plants than plain salt. Available in 20kg bag. Related Products Action Melt®Ice Melters. Safe-T-Plus®Ice Melters. Safe-T-Pet™Ice Melters. Safe-T-Traction™Ice Melters.