Finally a surface treatment that will end your Corrosion Under Insulation problems for good. A blue, non-skinning, surface conversion gel protects the metal surface from electrolytes that cause corrosion. RG2400 not only prevents CUI on new systwms, but stops existing corrosion in its tracks. RG2400 will even stop stainless steel or copper stress crack corrosion. with minimal surface preparation required for corrosion remediation and ease of application.