MAGIC BOSSMC LUBRICANT & PROTECTOR keeps RV slide outs moving freely and smoothly without gumming up. Protects delicate assemblies from rust and corrosion. PROTECTS: Offers maximum protection for expensive slide out mechanisms. COATS & SEALS: Repels moisture and leaves a lubricant protective film that inhibits corrosion. LUBRICATES: Made of Teflon, it reduces the friction by leaving a non-greasy lubrication which prevents the accumulation of debris and dirt on parts.