Volvo Penta Neutra-Salt Concentrate | OEM Cooling System Flush 21687793
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Volvo Penta Neutra-Salt Concentrate — OEM Cooling System Flush
Part Number: 21687793 | SKU: 21687793
Brand: Volvo Penta | Official Product Name: Neutra-Salt Concentrate
Type: OEM Marine Cooling System Neutralizing Agent
Container Size: Approx. 0.95 L (1 quart) concentrate
The genuine Volvo Penta factory-spec neutralizing agent for raw-water cooled marine engines and drives. Neutra-Salt Concentrate is designed to flush salt deposits from internal cooling passages and leave a corrosion-inhibiting protective film on metal surfaces — helping extend the life of your cooling system between services.
Key Features
- Genuine Volvo Penta OEM maintenance chemical
- Removes salt and mineral deposits from raw-water cooling passages
- Leaves a corrosion-inhibiting protective film on internal metal surfaces
- Designed for use with Volvo Penta’s engine-driven raw-water / sea-water pump flushing systems
- Suitable for inboard and sterndrive applications with raw-water cooling
- Simple preventative maintenance — helps avoid costly cooling system repairs
Compatible Applications
- Volvo Penta inboard gasoline and diesel engines with raw-water (sea-water) cooling
- Volvo Penta sterndrive packages equipped with engine-driven raw-water pump flushing arrangements
- Vessels operating in saltwater, brackish water, or high-mineral freshwater environments
- Confirm cooling system configuration and flushing setup before ordering — not all Volvo Penta engines use the same raw-water flushing arrangement
Service Interval
Use as part of your regular seasonal maintenance or after extended saltwater operation. Volvo Penta recommends flushing the raw-water cooling system at the end of each season or whenever the engine has been exposed to prolonged saltwater use. Replenish concentrate as needed when the supply runs low.
Parts Desk Insights
Best Use Case: This is a smart preventative maintenance item for any boat that operates regularly in salt or brackish water. Salt buildup in raw-water cooling passages develops gradually and is often invisible until it causes overheating or component failure. Regular flushing with Neutra-Salt is far less expensive than replacing corroded impellers, heat exchangers, or thermostat housings down the road.
Common Questions: Customers often ask whether a generic descaler or vinegar flush can substitute — while DIY options exist, the Volvo Penta Neutra-Salt formula is specifically engineered for compatibility with the alloys and seals used in Volvo Penta cooling systems, and it leaves a protective inhibitor film that generic products typically don’t provide. It’s also the product Volvo Penta service technicians reach for during scheduled maintenance.
Technical FAQ
Q: How do I use Neutra-Salt Concentrate?
A: The concentrate is used with Volvo Penta’s flushing system — typically a flushing bottle connected to the raw-water inlet. Follow the procedure outlined in your engine’s operator’s manual or Volvo Penta service documentation for your specific cooling system setup.
Q: Can I use this on a freshwater-cooled (closed-loop) engine?
A: Neutra-Salt is designed for raw-water (open) cooling systems. If your engine uses a closed freshwater cooling loop, consult your Volvo Penta dealer for the appropriate coolant and maintenance products.
Q: How much concentrate do I need per flush?
A: Refer to your Volvo Penta operator’s manual for the correct dilution and volume for your specific engine and flushing arrangement. Usage will vary by engine size and cooling system volume.
Q: Is this the same as an antifreeze or coolant?
A: No — Neutra-Salt is a neutralizing and corrosion-inhibiting flush agent for raw-water cooling passages. It is not an antifreeze or closed-system coolant.
Related Parts
Commonly paired with this product during cooling system service:
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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