Red Line Diesel WaterWetter 15oz - Coolant Additive for Diesel Commercial Vehicles - 12 Pack

Red Line Diesel WaterWetter is a cooling-system additive for diesel commercial vehicles that improves the heat transfer of ethylene and propylene glycol coolants and can reduce coolant temperatures by up to 20 degrees. It reduces the vapor barrier that forms on hot metal surfaces, cleans and lubricates water pump seals, and is compatible with new or used antifreeze including DEX-COOL and long-life formulas. Unlike regular WaterWetter, this diesel version contains no rust and corrosion inhibitors, so diesel road cars and light trucks with Cummins, Duramax and PowerStroke engines should use regular WaterWetter instead.

Specifications

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy