antifreeze tester
Worth a lookShows low returns (1.5%), but soft demand (-37.5% this quarter) keeps it on the watch list.
Returns
Great1.5%return rate — above 6% kills the launch gate
Review moat
Great410.72avg incumbent reviews — the moat a new listing must climb
Conversion
Great7.9%search→purchase rate — share of searches ending in a sale
Brand share
Great57%top-5 brand share — no brand owns this niche
Avg price
Great$15.62avg listing price — sweet spot $15–$100
Price range
Good$4.29–$139.04cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good51%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Okay$198K$198K/yr · 161K searches
Growth
Bad-37.5%90-day search growth — must beat 0% to launch
Competition
The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.Brands
28 rising
Sellers
81
Top-5 brand share
57%
Open market
36%
- KVAEY12%
- aichose12%
- ATD12%
- SHMZK11%
- OEMTOOLS10%
- Phoenix Systems8%
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 32 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
ATD Tools 1106 Professional Antifreeze and Coolant Tester
ATD$11.394.3★542 rev
KVAEY 1PCS Coolant Tester Accessory Automotive Professional Antifreeze Densitometer Freezing Testing Tool Universal Coolant Hydrometer Tester for Winter and Summer Car Accessories
KVAEY$7.644.6★129 rev
SHMZK Coolant Tester Accessory Dial Type Antifreeze Coolant Car Battery Hydrometer Tester Automotive Anti-Freeze Battery Liquid Densitometer Coolant Tester Car Accessories (1 PCS)
SHMZK$7.324.5★127 rev
OEMTOOLS 24507 Professional Series Ethylene Glycol Antifreeze Tester Tests Freezing Point of Antifreeze and Proper Water/Coolant Mixture
OEMTOOLS$15.234.6★499 rev
Phoenix Systems 8006-B Double-Ended Brake Fluid + Coolant Test Strips (15 foil wrapped test strips) 1 Pack
Phoenix Systems$16.374.6★1,383 rev
Newest
by launch date
EWOJUYE Upgraded Dial Type Antifreeze Tester Automotive with 7.87 Long Tube Dual Scale Coolant Tester Automotive for Accurate Freeze Point and Boil Point Durable Anti Freeze Testers
EWOJUYE$4.294 rev
TSIEBRV Dial Type Antifreeze Tester for Coolant Dual Scale (F/C) Coolant Tester Automotive for Accurate Freeze & Boil Point Testing Professional Anti Freeze Testers Automotive
TSIEBRV$4.6615 rev
Antifreeze Tester Automotive Dial Type Antifreeze Coolant Tester Hydrometer Car Battery Liquid Densitometer Coolant Anti Freeze Universal Tool for Car System Winter and Summer
Xtruck$6.9915 rev
VKQTS Antifreeze Tester Automotive Professional Antifreeze Coolant Tester with Color-Coded Floats Portable Antifreezes Testers for Coolant Car Truck Engine Anti-Freeze Protection
VKQTS$9.224 rev
Turcee Dial Type Antifreeze Tester Automotive Tools Professional Car Coolant Tester with F/C Dual Scale Design Portable Anti Freeze Testers Automotive for Measuring Freezing/Boiling Points
Turcee$5.6117 rev
Trending
90-day click momentumEWOJUYE Upgraded Dial Type Antifreeze Tester Automotive with 7.87 Long Tube Dual Scale Coolant Tester Automotive for Accurate Freeze Point and Boil Point Durable Anti Freeze Testers
EWOJUYE$4.293.5★
VKQTS Antifreeze Tester Automotive Professional Antifreeze Coolant Tester with Color-Coded Floats Portable Antifreezes Testers for Coolant Car Truck Engine Anti-Freeze Protection
VKQTS$9.225.0★
Antifreeze Tester Automotive Dial Type Antifreeze Coolant Tester Hydrometer Car Battery Liquid Densitometer Coolant Anti Freeze Universal Tool for Car System Winter and Summer
Xtruck$6.994.1★
JNXIJ Coolant Tester Accessory Dial Type Antifreeze Coolant Hydrometer for Freezing Point Testing High Accuracy Car Battery Liquid Densitometer Antifreeze Tester for Ethylene Glycol
JNXIJ$4.973.9★
TSIEBRV Dial Type Antifreeze Tester for Coolant Dual Scale (F/C) Coolant Tester Automotive for Accurate Freeze & Boil Point Testing Professional Anti Freeze Testers Automotive
TSIEBRV$4.664.3★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -37.5% search growth over the last 90 days.Peak months: Jan, Oct, Nov, Dec · busiest ÷ quietest = 3.5×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“handy”
“As advertised”
“Good for the price”
“Works fine very accurate”
“Great product and easy”
“Excellent for keeping my antifreeze cavatation under control by reducing cavatation in the engine”
“had found it to be very accurate”
“it now works fine”
“A practical, reliable accessory that makes maintenance easier and safer”
“durable enough for repeated use”
What buyers complain about
“Cheap made”
“Tester was not even close to being accurate”
“it did turn yellow like it was supposed to”
“Doesn't seem to function as it should”
“The instructions are beyond confusing”
“It costs a little more than other kits”
“Sample tube a bit short”
“making it impossible to use”
“rubber bulb has cracked”
“Broke on the first use”