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Overview

Know your engine is protected before the cold hits. This dial type antifreeze tester draws a coolant sample with a squeeze bulb and shows freeze and boil protection in both Celsius and Fahrenheit on an easy to read dial. Lightweight ABS construction makes it a handy tool for quick seasonal checks in the garage or driveway.

New 2026/27 Edition — Antifreeze Coolant Tester Dial Type Hydrometer for Cars Rapid Freeze and Boil Point Test in Celsius and Fahrenheit Lightweight Portable Tool

Model: COOLT-457
Web Code: 20231903
Sold and shipped by | 4.5 seller rating (348 reviews)

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Warranty Information

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

• Rapid Coolant Test: Squeeze the bulb to draw coolant and read engine protection in seconds.

• Freeze Point Reading: Shows how cold your coolant can get before it starts to freeze.

• Boil Point Reading: Also checks boil over protection to help prevent summer overheating.

• Celsius and Fahrenheit: The clear dial reads in both Celsius and Fahrenheit for easy checks.

• Easy Read Dial: A large dial needle makes results simple to see at a glance.

• Lightweight ABS Build: Durable ABS plastic keeps the tester light at only about 70 g.

• Portable Size: Compact enough to store in a glove box, toolbox or garage drawer.

• Seasonal Maintenance: Perfect for checking coolant before winter and before summer road trips.

• Simple to Use: No batteries or calibration needed, just draw a sample and read.

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

Free standard shipping on all orders.

Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

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  • No restrictions in Canada
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
See our return policy to find specific return information for this product and steps on how to return by mail.