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  • SPLASH RV & Marine Antifreeze -50°F Burst Protection, 1 Gallon (1 Pack)

SPLASH RV & Marine Antifreeze -50°F Burst Protection, 1 Gallon (1 Pack)

4.5 out of 5 stars (899)
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice
$10.80
$0.08 per fluid ounce
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About this item

  • BURST PROTECTION PERFORMANCE (-50°F) – Helps protect pipes and systems from freezing damage during cold weather storage
  • DESIGNED FOR MULTIPLE SYSTEMS – Suitable for RVs, boats, pools, spas, and seasonal plumbing applications
  • SYSTEM PROTECTION FORMULA – Helps support protection of pipes, seals, and system components during winterization
  • EASY APPLICATION – Designed for straightforward use when preparing systems for cold weather conditions
  • RELIABLE WINTERIZING SOLUTION – Helps maintain system integrity during off-season storage

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Product Description

SPLASH RV & Marine Antifreeze -50°F Burst Protection, 1 Gallon (1 Pack)

Product information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
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SPLASH RV & Marine Antifreeze -50°F Burst Protection, 1 Gallon (1 Pack)

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What's in the box

  • Bottle

    • Important information

    Ingredients

    Antifreeze

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    Customer reviews

    4.5 out of 5 stars
    899 global ratings

    Customers say

    Customers find the antifreeze works well for winterizing RVs and home fixtures, keeping everything from freezing and being easy to flush out. The product receives positive feedback for its quality and effectiveness, with one customer noting it saved their motor multiple times. Opinions on value are mixed, with some finding it a great value while others consider it overpriced.
    AI Generated from the text of customer reviews

    Select to learn more

    24 customers mention functionality, 24 positive, 0 negative
    Customers find that the antifreeze works well, particularly for winterizing RVs, with one customer reporting that it saved their motor multiple times.
    I bought this to winterize my Cape condo toilets. So far so no issues.Read more
    Does the job, saves time to drive to town.Read more
    Works as it should, but I wish it was cheaper.Read more
    Did the job!Read more
    14 customers mention quality, 13 positive, 1 negative
    Customers find the antifreeze product to be of good quality.
    Great product at a fair price!Read more
    Good product!Read more
    Very good product however much much cheaper at Walmart.Read more
    Good price and product!Read more
    7 customers mention ease of use, 6 positive, 1 negative
    Customers find the antifreeze easy to use and flush out.
    I winterize my boat engine with this every year, no complaints, easy to use, it gets very cold, here in the winter, have never had any issues, with...Read more
    Loved how well this stuff worked but more importantly how easy it was to flush out when prepping for spring. No issues. Two rinses and it was gone....Read more
    ...I recommend this product wholeheartedly- much easier to use and more effective then trying to blow out all the water in your lines....Read more
    ...It was easy to use and gave me confidence that everything would be protected during the off-season....Read more
    6 customers mention anti-freeze, 5 positive, 1 negative
    Customers find the antifreeze effective for RVs, with one mentioning it keeps their boat engine protected.
    ...cold, here in the winter, have never had any issues, with it keeping my boat engine, from freezingRead more
    ...In the end this is RV antifreeze. It's pink. It's liquid. It keeps things from freezing and breaking.Read more
    It’s antifreeze. Bought it for our RV. It works. Came quickly.Read more
    Antifreeze for RV water systemRead more
    6 customers mention winterizing, 6 positive, 0 negative
    Customers find the antifreeze effective for winterizing home fixtures and RVs, keeping them protected from freezing temperatures.
    Winterizing an RV for winter storage where temps drop below freezing is common sense ! Unless your a plumber and enjoy repairing broken water lines....Read more
    ...It's pink. It's liquid. It keeps things from freezing and breaking.Read more
    great for winterizing fixtures in your homeRead more
    ...boat engine with this every year, no complaints, easy to use, it gets very cold, here in the winter, have never had any issues, with it keeping my...Read more
    20 customers mention value for money, 7 positive, 13 negative
    Customers have mixed opinions about the antifreeze's value for money, with some finding it a great value while others consider it way overpriced.
    Overpriced, came late and they want me to pay shippingRead more
    Good price and product!Read more
    This product is over priced. Buy at other places for $3-4 dollars for a product that does the same thing....Read more
    Too expensive.Read more
    False Advertising
    1 out of 5 stars
    False Advertising
    10 degrees F above zero and it is frozen SOLID. SAYS GOOD TO -75 below zero……hope my RV waterlines are not busted now…. DO NOT BUY THIS CRAP
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    Top reviews from the United States

    • Douglas Cox
      5 out of 5 stars
      Does the job!
      Reviewed in the United States on May 26, 2026
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      Works great for winterizing pool!

      Sending feedback...
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      Sending feedback...
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    • Jayson
      5 out of 5 stars
      untitled
      Reviewed in the United States on April 21, 2026
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      I received This product in a timely manner and it performed as expected.

      Sending feedback...
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    • Connar Hughes
      5 out of 5 stars
      No complaints!
      Reviewed in the United States on April 3, 2026
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      Full content visible, double tap to read brief content.

      Worked fine! No complaints!

      Sending feedback...
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      Sending feedback...
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    • Chris Stephany
      4 out of 5 stars
      Worked Well, but Check for Leaks
      Reviewed in the United States on June 2, 2026
      Brief content visible, double tap to read full content.
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      I purchased several gallons to winterize my boat, and the antifreeze itself worked exactly as expected. It was easy to use and gave me confidence that everything would be protected during the off-season.

      The only issue I encountered was that one of the jugs had a slow leak that I didn't notice until it had been sitting on the shelf for a while. It wasn't a major spill, but it was enough to make a mess and waste some product.

      In the end, I actually had more antifreeze than I needed for the job, which made the leak a little more frustrating since I could have simply used that jug instead of storing it.

      Sending feedback...
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      Sending feedback...
      Thanks, we'll investigate in the next few days.
    • Al R
      5 out of 5 stars
      Good product!
      Reviewed in the United States on November 30, 2025
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      Full content visible, double tap to read brief content.

      I use this in my closed hot water heat exchanger system, works great to stop corrosion

      One person found this helpful
      Sending feedback...
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    • SALVATORE NAPOLITANO
      5 out of 5 stars
      best for winterizing your home fixtures
      Reviewed in the United States on March 16, 2026
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      Full content visible, double tap to read brief content.

      great for winterizing fixtures in your home

      Sending feedback...
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    • keith ward
      1 out of 5 stars
      Works good
      Reviewed in the United States on January 20, 2026
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      Too much money got it in wallmart for a 3sd of the price

      One person found this helpful
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    • jim stucki
      5 out of 5 stars
      Good price wirks well
      Reviewed in the United States on January 13, 2026
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      I use this after cleaning my electric garden sprayer and airless. The other stuff costs to much a is the same.

      Sending feedback...
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    See more reviews

    Product Summary: SPLASH RV & Marine Antifreeze -50°F Burst Protection, 1 Gallon (1 Pack)

    From Splash

    4.5 out of 5 stars, 899 ratings

    Customer reviews

    100+ bought in past month

    Price

    One-time purchase: $10.80 ( $0.08 / fluid ounce)

    One-time purchase: $12.50 ( $0.10 / fluid ounce)

    Purchasing options

    Other sellers

    Other sellers

    About this Item

    • BURST PROTECTION PERFORMANCE (-50°F) – Helps protect pipes and systems from freezing damage during cold weather storage
    • DESIGNED FOR MULTIPLE SYSTEMS – Suitable for RVs, boats, pools, spas, and seasonal plumbing applications
    • SYSTEM PROTECTION FORMULA – Helps support protection of pipes, seals, and system components during winterization
    • EASY APPLICATION – Designed for straightforward use when preparing systems for cold weather conditions
    • RELIABLE WINTERIZING SOLUTION – Helps maintain system integrity during off-season storage

    Product Description

    SPLASH RV & Marine Antifreeze -50°F Burst Protection, 1 Gallon (1 Pack)

    Important Information

    Ingredients

    Antifreeze

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