Radiator Flush
MaybeProducts sell for $21.11 on average, inside the sweet spot. But demand is soft, at -9.8% this quarter, so Radiator Flush is a Maybe.
- Flapen Score
- 50 / 100Top 44% of 7,287 Automotive niches · +1 vs the category median of 4950
- Market size
- $287K/yr177K searches / yr
- 90-day growth
- -9.8%search demand this quarter
- Competition
- 70%top-5 click share · 12 brands · 73 sellers
Flapen Score
Radiator Flush against its category
The dotted line is the Automotive average. Past it, Radiator Flush is stronger. Inside it, weaker.
Market
The Radiator Flush market on Amazon at a glance
Shoppers on Amazon United States searched for Radiator Flush 177K times last year and spent an estimated $287K. The top 5 brands take 83% of clicks. Flapen scores it 50 out of 100, a Maybe.
01 · Demand
An estimated 7.7% of those searches ended in a purchase.
Shoppers searched for this 177K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 7.7% of those searches ended in a purchase. Searches in the last 90 days moved -9.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated $287K a year.
- Searches, last 12 months
- 177K
- Growth, 90 days vs prior 90
- -9.8%
- Conversion, latest week
- 7.7%
- Market size, estimated
- $287Ka year
- Peak month
- November1.3× the quietest month
- Top search term
- radiator flush83K searches a year
02 · Price
A sale here is worth $21.11.
Listings sell for $21.11 on average, from $5.82 to $92.76. Amazon reports units sold in ranges. This niche sold 10K to 13K a year. The average listing sells 500 to 750 of them. At $21.11 that is $11K to $16K a year per listing.
- Average price
- $21.11inside the $15 to $100 sweet spot
- Price range
- $5.82–$92.76
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 10K–13K
- Units per listing a year
- 500–750
- Revenue per listing a year
- $11K–$16K
- Returns
- 1.9%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
69% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 2.7% of listings are out of stock. The average listing ranks #69 within Oils & Fluids. It carries 545 reviews at 4.49 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 69%
- Prime listings
- 100%
- Out of stock, average day
- 2.7%
- Average rank
- #69in Oils & Fluids
- Average rating
- 4.49 starsAmazon United States average 4.42 stars
- Average reviews
- 545per listing
- Listings tracked
- 16
04 · Newcomers
1 of last year's 3 launches cleared the first-year sales bar.
3 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 78 months on average, so the names here are established.
- Launched, last 12 months
- 3
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 78 months
Products
Top Radiator Flush products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Prestone AS105 Total Cooling System Cleaner for Radiator Heater Core and Hoses 22 oz. 1 pack
- Price
- $13.85
- Rating
- 4.6/5
- Reviews
- 2,360
- Age
- 13y ago

CRC Thermocure Coolant System Rust Remover 32 Oz Rust Remover for Vehicle Cooling Systems Removes Rust Scale and Deposits
- Price
- $26.14
- Rating
- 4.6/5
- Reviews
- 1,572
- Age
- 11y ago

Prestone Products Corp Radiator Flush/Cleaner AS105R
- Price
- $5.82
- Rating
- 4.7/5
- Reviews
- 181
- Age
- 2y ago

BlueDevil 3 in 1 Radiator Flush | Automotive Oil Degreaser Radiator Flush Rust Remover | 32 oz. | Multi-Vehicle Formula
- Price
- $12.82
- Rating
- 4.5/5
- Reviews
- 587
- Age
- 5y ago

DEI Radiator Relief Cooling System Flush Improves Cooling Performance 16 oz
- Price
- $11.78
- Rating
- 4.2/5
- Reviews
- 42
- Age
- 16y ago
Trending
estimated 90-day click momentum
BILITOOLS Coolant Funnel Kit Automotive Radiator Coolant Filling Tool
- Price
- $18.32
- Rating
- 4.5/5
- Reviews
- 58
- Age
- 1y ago

LURKA Coolant System Flush Gun Lever Action Heater Core Flush Kit with 3/4 & 1/2 Garden Hose Adapters/Shut-Off Valve Air & Water Combo Radiator Flusher Nozzles for 5 Sizes of Hoses (19-40mm)
- Price
- $27.03
- Rating
- 4.5/5
- Reviews
- 6
- Age
- 5mo ago

ERRECOM Zeus+ Cleaner for Radiators and Cooling Systems 12 fl oz Bottle (350 mL)
- Price
- $11.93
- Rating
- 4.4/5
- Reviews
- 151
- Age
- 7mo ago

QUFYSK Coolant Flush Gun Lever Action Heater Core Flush Kit Coolant Flush Kit for Automotive Coolant Flush Air and Water Radiator Flush Kit with Nozzles for 19-40mm Hoses
- Price
- $29.81
- Rating
- 4.7/5
- Reviews
- 27
- Age
- 6mo ago

Prestone Products Corp Radiator Flush/Cleaner AS105R
- Price
- $5.82
- Rating
- 4.7/5
- Reviews
- 181
- Age
- 2y ago
Newest
by launch date
LURKA Coolant System Flush Gun Lever Action Heater Core Flush Kit with 3/4 & 1/2 Garden Hose Adapters/Shut-Off Valve Air & Water Combo Radiator Flusher Nozzles for 5 Sizes of Hoses (19-40mm)
- Price
- $27.03
- Rating
- 4.5/5
- Reviews
- 6
- Age
- 5mo ago

QUFYSK Coolant Flush Gun Lever Action Heater Core Flush Kit Coolant Flush Kit for Automotive Coolant Flush Air and Water Radiator Flush Kit with Nozzles for 19-40mm Hoses
- Price
- $29.81
- Rating
- 4.7/5
- Reviews
- 27
- Age
- 6mo ago

ERRECOM Zeus+ Cleaner for Radiators and Cooling Systems 12 fl oz Bottle (350 mL)
- Price
- $11.93
- Rating
- 4.4/5
- Reviews
- 151
- Age
- 7mo ago

BlueDevil Radiator Flush 32 oz | Deep Cleaning Coolant System Flush | Removes Rust Scale & Grime
- Price
- $92.76
- Rating
- 4.5/5
- Reviews
- 587
- Age
- 1y ago

BILITOOLS Coolant Funnel Kit Automotive Radiator Coolant Filling Tool
- Price
- $18.32
- Rating
- 4.5/5
- Reviews
- 58
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 70% of clicks. A locked shelf that new listings rarely crack.
Brands
12 rising
Sellers
73
Est. top-5 brand share
83%
Top 20: 100%
Est. top-5 click share
70%
Top 20: 100%
Open market
12%
- Prestone36%
- BlueDevil Products19%
- CRC19%
- Gunk5%
- Design Engineering5%
- IRONTITE5%
- Open — no brand owns it (6 brands, 12%)
Demand
Radiator Flush search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.3×
Search terms
Top Radiator Flush search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- radiator flush83K/yr
- coolant flush41K/yr
- radiator flush and cleaner16K/yr
- cooling system flush6K/yr
- thermocure5K/yr
- cooling system cleaner4K/yr
- coolant cleaner4K/yr
- coolant flush cleaner5K/yr
- coolant system flush4K/yr
- thermocure radiator flush4K/yr
Reviews and returns
What reviews say buyers love and hate about Radiator Flush
We read the reviews and the return reasons for every product selling here.
“not sure how much leaked out”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
19 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Radiator Flush questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









