Is antifreeze tester profitable to sell on Amazon United Kingdom?

The niche generates £26K/yr across 18 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -32.3%. Flapen's verdict: Skip it (45/100).

How competitive is the antifreeze tester niche?

15 brands and 46 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 78% of demand.

What do buyers complain about in antifreeze tester?

Top complaints mined from reviews: Ease Of Use, Durability, Leak-Proof. The return rate is 0.8%.

When does demand for antifreeze tester peak?

Demand peaks in Jan–Oct–Nov–Dec; the busiest month runs 7.5× the quietest.

What does it cost to enter the antifreeze tester niche?

Listings span £4.79–£18.25; the average listing price is £9.28 (sweet spot $15–$100). The average incumbent carries 83 reviews — the moat a new listing must climb.

antifreeze tester

Skip it

A small market ($26K/yr) — this niche doesn't clear our bar today.

Review moat

Incredible83.11

avg incumbent reviews — the moat a new listing must climb

Returns

Incredible0.8%

return rate — above 5% kills the launch gate

Conversion

Great7.9%

search→purchase rate — share of searches ending in a sale

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Brand share

Okay78%

top-5 brand share — brands hold most of the demand

Competition

Okay60%

top-5 click share — leaders hold, buyers still browse

Avg price

Okay£9.28

avg listing price — sweet spot $15–$100

Price range

Bad£4.79–£18.25

cheapest to priciest tracked listing — scored on the share inside $15–$100

Growth

Bad-32.3%

90-day search growth — must beat 0% to launch

Market size

Bad£26K

£26K/yr · 35K searches

Signals Out of Stock

According to Flapen's Amazon United Kingdom niche tracking, antifreeze tester is a £26K/yr Amazon United Kingdom market (35K searches/yr). The top 5 brands hold 78% of demand. Demand peaks in Jan–Oct–Nov–Dec. Verdict: Skip it — 45/100.

Data updated Jul 18, 2026 · scored weekly · How we score niches

antifreeze tester market data

Units sold / yr: 3K–4K; avg 100–250/product
Revenue / yr: £28K–£37K; units × avg price
Conversion rate: 7.9%
Avg BSR: #322
Page quality: 0%
Prime: 100%
Sponsored: 83%
Out of stock: 9.2%
Avg brand age: 53 months
Avg seller age: 202 days

Competition & brand share

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 falling

Sellers

Top-5 brand share

78%

Top 20: 100%

Top-5 click share

60%

Top 20: 100%

Open market

22%

Sealey37%
QWORK19%
Simply6%
Kuuleyn6%
BGS Do it yourself5%
Crumye5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -32.3% search growth over the last 90 days.

Peak months: Jan, Oct, Nov, Dec · busiest ÷ quietest = 7.5×

Open Trend

Top antifreeze tester search terms

coolant tester9K/yr -20.7%6.7% conv.
antifreeze tester21K/yr -41.5%8.1% conv.
anti freeze testers5K/yr -30.6%9.1% conv.

All search terms

Top antifreeze tester products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)3 products missing review or click data not plotted

All 18 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Sealey AK4122 Propylene Glycol Antifreeze Tester Disc Type

Sealey£9.164.6★386 rev

Sealey Ak4120 Ethylene Glycol Antifreeze Tester Disc Type

Sealey£9.194.5★224 rev

$QWORK 4-in-1 Antifreeze Refractometer with Automatic Temperature Compensation for Antifreeze + Battery Fluid + AdBlue(DEF) + Windshield Washer Fluid$

QWORK 4-in-1 Antifreeze Refractometer with Automatic Temperature Compensation for Antifreeze + Battery Fluid + AdBlue(DEF) + Windshield Washer Fluid

QWORK£11.434.3★60 rev

$QWORK 4-in-1 Antifreeze Refractometer Ethylene & Propylene Glycol Coolant Tester with Urea & Battery Acid Measurement for Auto Industry$

QWORK 4-in-1 Antifreeze Refractometer Ethylene & Propylene Glycol Coolant Tester with Urea & Battery Acid Measurement for Auto Industry

QWORK£11.634.5★83 rev

Simply AF001 Anti Freeze Tester - Ethylene Glycol Indicator

Simply£7.453.5★15 rev

Newest

by launch date

Rapid Revive Coolant Tester & Antifreeze Tester 2-in-1 | Cooling System Pressure Test Kit | Ethylene Glycol Hydrometer for Car Van Truck

Rapid Revive£8.892 rev

1mo ago

Wellrun Antifreeze Coolant Tester for Cars High Accuracy Engine Fluid Tester Handheld Dial Hydrometer for Measuring Freezing and Boiling Points Compatible with Various Coolants

wellrun£6.880 rev

4mo ago

Antifreeze Tester Coolant Tester Dial-Type Coolant Pressure Teste-r Hydrometer for Car Engine Fluid High Accuracy Automotive Antifreeze Test for Winter and Summer Maintenance

Yupaluz£4.790 rev

4mo ago

$4 in 1 Refractometer Coolant Tester Antifreeze Tester for Measuring the Specific Gravity of Automotive Urea Freezing Point of Antifreeze$

4 in 1 Refractometer Coolant Tester Antifreeze Tester for Measuring the Specific Gravity of Automotive Urea Freezing Point of Antifreeze

HETKRVN£12.140 rev

6mo ago

$4-in-1 Antifreeze Refractometer Ethylene & Propylene Glycol Coolant Tester Hand Refractometer for Battery Acidand and Windshield Washer Fluid$

4-in-1 Antifreeze Refractometer Ethylene & Propylene Glycol Coolant Tester Hand Refractometer for Battery Acidand and Windshield Washer Fluid

Vutlace£14.8610 rev

9mo ago

What buyers say about antifreeze tester

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall25%

“Build quality is solid for the price”

Value For Money20%

“Great value to price ratio”

Ease Of Use18%

“Easy to use”

Advertised Vs Actual Product11%

“Does the Job”

Efficiency9%

“effective tool”

Measurement/Reading Accuracy6%

“gives a good reading of density”

Instructions/User Manual/Troubleshooting5%

“the reading is easy enough to understand once you've had a quick look at the instructions”

Adjustability/Rotatability/Reclining2%

“did not need any adjustment”

Leak-Proof2%

“there wasn't any leakage when used”

Maintenance And Repair1%

“Great for routine maintenance or before winter sets in”

What buyers complain about

Ease Of Use25%

“Pain to use”

Durability25%

“dropped it”

Leak-Proof13%

“Srart leaking after second use”

Functionality-Overall13%

“Doesn't work”

Measurement/Reading Accuracy13%

“False readings”

Quality-Overall13%

“no quality”

Top return reasons

Functionality-Overall29%

Measurement/Reading Accuracy23%

Defective Material/Parts13%

Coolant8%

Quality-Overall4%

Durability4%

Compatibility-Overall4%

Product Condition4%

Instructions/User Manual/Troubleshooting4%

Certifications4%

Common questions

Is antifreeze tester profitable to sell on Amazon United Kingdom?: The niche generates £26K/yr across 18 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -32.3%. Flapen's verdict: Skip it (45/100).
How competitive is the antifreeze tester niche?: 15 brands and 46 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 78% of demand.
What do buyers complain about in antifreeze tester?: Top complaints mined from reviews: Ease Of Use, Durability, Leak-Proof. The return rate is 0.8%.
When does demand for antifreeze tester peak?: Demand peaks in Jan–Oct–Nov–Dec; the busiest month runs 7.5× the quietest.
What does it cost to enter the antifreeze tester niche?: Listings span £4.79–£18.25; the average listing price is £9.28 (sweet spot $15–$100). The average incumbent carries 83 reviews — the moat a new listing must climb.