Improve heating system performance with Oil Tank Sludge Remover from ComStar International Inc. This industrial-strength treatment dissolves sludge, sediment, and contaminants that accumulate inside oil storage tanks over time. Routine maintenance helps improve burner efficiency, maintain smooth fuel delivery, and reduce costly repairs. ComStar develops every product using strict quality standards and environmentally responsible manufacturing practices. Supported by more than five decades of innovation, ComStar continues to deliver professional maintenance chemicals trusted by HVAC contractors and facility managers worldwide.