Starbrite 31200 Winter Safe -50°F Antifreeze, Gal.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Star brite Winter Safe -50°F antifreeze helps protect marine engine components and water systems during cold-weather storage, combining freeze protection with corrosion inhibitors.
Key Features
- Non-toxic virgin propylene glycol formula
- Ethanol-free
- Protects water systems and engines from freeze ups during storage (down to -50°F)
- Contains corrosion inhibitors to help protect metal engine components and seals
- Safe for copper, brass, and all types of plastic
- Case packs only
Product Compatibility
- Marine winterization
- Engine storage protection
- Marine water system freeze protection
Product Details
- Brand/Line: Star brite
- Product Name: Winter Safe -50°F Antifreeze
- Rating/Freeze Protection: -50°F
- Container: Gal.
- SKU on variant: 74-31200
- Formula: Non-toxic virgin propylene glycol
- Alcohol content: Ethanol-free
- Protection: Water systems & engines during storage
- Corrosion protection: Includes corrosion inhibitors to protect metal components and seals
- Material compatibility claim: Safe for copper, brass and all types of plastic
- Packaging note: Sold in case packs only
- Variant weight (system data): 4242 g
Parts Desk Insights
Best Use Case: Use during seasonal winterization when you need -50°F freeze protection for both plumbing/water lines and engine-related components during off-season storage.
Common Issues: If you’re winterizing a system that uses a mix of metals and plastics (e.g., copper/brass fittings plus plastic hoses/lines), verify you’re treating the correct loops (water system vs. engine storage path) and confirm the winterization checklist for your setup to avoid leaving residual water that can freeze.
Related Products & Accessories
- Browse Winterization - Explore additional winterization chemicals and supplies to complete the job.
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.