Pro-Blend 40 Below Radiator Treatment – 16 oz.

Pro-Blend 40 Below, offered by Keyser Manufacturing, is a coolant additive designed to help reduce coolant temperatures by up to 40°F. It is suitable for race cars, street rods, RVs, marine applications, cars, trucks, and other vehicles with high-performance gas or diesel engines.

Product details:

• One 16 oz. bottle
• Helps protect against excessive coolant temperatures
• Especially useful during racing, towing, climbing, idling, or other conditions with restricted airflow
• Designed to help maintain a coolant operating range of approximately 180–210°F
• Compatible with ethylene-glycol antifreeze
• Distilled water is recommended for best results

Directions and important warnings:

• Shake well immediately before adding.
• Add only when the radiator and cooling system are cool.
• Do not use with Dex-Cool.
• Do not use with propylene-glycol antifreeze.
• Do not add stop-leak or radiator block/sealer.
• Keep the product off plated, polished, powder-coated, magnesium, and painted surfaces.
• Wipe up any spills immediately.

Important: Keyser’s published full-system performance information is based on using one 32 oz. can with a mixture of approximately 80% distilled water and 20% ethylene-glycol antifreeze. This listing is for one 16 oz. bottle; the required amount depends on cooling-system capacity.