RV & Marine Antifreeze -60°C | 3.78 L | 35-344AZWP
In stock items ship same or next day.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
RV & Marine Antifreeze – -60°C Protection | 3.78 L
Part Number: 35-344AZWP
Size: 3.78 L (1 US gallon)
Protection: -60°C / -76°F burst protection
Product Overview
A non-toxic propylene glycol-based antifreeze formulated for use in RV and marine freshwater systems, plumbing circuits, and holding tanks. Provides freeze protection to -60°C, well beyond typical winter storage requirements in most Canadian and northern climates. Safe for potable water systems when used as directed.
- Burst protection to -60°C (-76°F)
- Non-toxic, propylene glycol-based formula
- 3.78 L (1 US gallon) jug
- Safe for use in fresh water plumbing, holding tanks, and raw-water cooling circuits
- Ready to use — no dilution required for standard winterizing applications
Compatible Applications
- Marine freshwater plumbing systems (sinks, showers, heads)
- Holding tanks and waste systems
- Raw-water engine cooling circuits during winter lay-up
- Water heaters and hot-water circuits
- RV fresh water and plumbing systems
- Bilge areas and low-point drains susceptible to freezing
Note: Confirm compatibility with your specific engine cooling system before use in raw-water circuits. Not intended as a replacement for engine-specific coolant in closed cooling systems.
How to Use
- Flush freshwater plumbing with clean water before adding antifreeze
- Pump antifreeze through each water line until it flows pink at each outlet
- Pour directly into holding tanks, toilet bowls, and P-traps
- For raw-water engine circuits, flush per your engine manufacturer’s winterizing procedure
- Flush thoroughly with fresh water before returning the system to service in spring
Related Products
Parts Desk Insights
This is the go-to antifreeze for end-of-season freshwater system winterizing on boats and RVs. The -60°C rating provides a significant safety margin for Canadian winters and cold-storage conditions. The most common customer question is whether to dilute it — for standard winterizing of plumbing and holding tanks, use it straight from the jug. For raw-water engine flushing, always follow the engine manufacturer’s procedure. If a customer needs deeper protection or a higher-spec product, the Star Brite premium antifreeze is a strong alternative.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.