---
title: "Red Angel A/c Stop Leak — $52K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/red-angel-a-c-stop-leak"
last_updated: "2026-08-09T20:46:56.484Z"
locale: en
meta:
description: "Niche score 56/100 · $52K/yr market · 26K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 56/100 · $52K/yr market · 26K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Red Angel A/c Stop Leak — $52K/yr Amazon US Niche (2026) - Flapen"
---
# **red angel a/c stop leak**
**Worth a look**
Shows demand growing +151.2% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 13Growth 96Conversion 52Competition 13Returns 96Price range 55Avg price 94Brand share 18Review moat 73Quality gap 96
**Growth**
**Incredible****+151.2%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Incredible****3.9★**
avg incumbent rating — lower means beatable quality
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$47.01**
avg listing price — sweet spot $15–$100
**Review moat**
**Good****597**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Good****$17.84–$167.16**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****4.3%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Bad****93%**
top-5 brand share — brand-locked demand
**Market size**
**Bad****$52K**
$52K/yr · 26K searches
**Competition**
**Bad****85%**
top-5 click share — a locked-up shelf
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)") [** Quality Gap**](https://flapen.com/research/niches?market=us&signal=quality_gap "Avg rating < 4.0")
According to Flapen's Amazon United States niche tracking, red angel a/c stop leak is a $52K/yr Amazon United States market (26K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Worth a look — 56/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **red angel a/c stop leak market data**
- **Units sold / yr**
- **2K–3K**
- avg 250–500/product
- **Revenue / yr**
- **$94K–$118K**
- units × avg price
- **Conversion rate**
- **4.3%**
- **Avg BSR**
- **#122**
- **Page quality**
- **0%**
- **Prime**
- **70%**
- **Sponsored**
- **70%**
- **Out of stock**
- **2.2%**
- **Avg brand age**
- **77 months**
- **Avg seller age**
- **171 days**
## **Competition & brand share**
The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▲rising
**Sellers**
**24**
**Top-5 brand share**
**93%**
Top 20: 100%
**Top-5 click share**
**85%**
Top 20: 100%
**Open market**
**3%**
- BlueDevil Products58% - Leak Saver11% - ERRECOM10% - A/C Pro8% - InterDynamics5% - cmebiz4% - Open — no brand owns it (1 brand, 3%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +151.2% search growth over the last 90 days.
2K1KSpike '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 6.8×
[**Open Trend **](https://flapen.com/research/us/automotive/red-angel-a-c-stop-leak/trend)
## **Top red angel a/c stop leak search terms**
- **red angel ac stop leak**9K/yr+138.2%2.7% conv. - **r134a stop leak**6K/yr+134.0%1.2% conv. - **red angel a/c stop leak**5K/yr+325.7%1.5% conv. - **ac stop leak r134 super seal**2K/yr+312.6%1.7% conv. - **red angel**4K/yr+25.0%1.8% conv. [**All search terms **](https://flapen.com/research/us/automotive/red-angel-a-c-stop-leak/search-terms)
## **Top red angel a/c stop leak 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.
0%15%$8K30%$15K45%$23K60%$31K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**BlueDevil Products Red Angel 49496 A/C Stop Leak - 2 Ounce**BlueDevil Products**$25.13**4.3★832 rev](https://www.amazon.com/dp/B00NSRVP6A) [2**Leak Saver Direct Inject AC Leak Sealer | AC Stop Leak for Most HVAC Systems Up to 5 Tons | Works with All Systems & AC Refrigerants | Made in the USA**Leak Saver**$35.36**4.3★2,237 rev](https://www.amazon.com/dp/B071VMXMLS) [3**Certified A/C Pro UV Leak Detection Kit**A/C Pro**$17.84**4.3★1,268 rev](https://www.amazon.com/dp/B003JOB594) [4**ERRECOM Extreme A/C Leak Stop for Vehicle A/C Systems | 3.6 OZ Aerosol Can**ERRECOM**$30.32**2.6★42 rev](https://www.amazon.com/dp/B0G6FLGWH9) [5**Red Angel A/C Stop Leak & Conditioner by BlueDevil Products**BlueDevil Products**$46.16**4.2★12 rev](https://www.amazon.com/dp/B01LRHWHVE)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**ERRECOM Extreme A/C Leak Stop for Vehicle A/C Systems | 3.6 OZ Aerosol Can**ERRECOM**$30.32**42 rev6mo ago](https://www.amazon.com/dp/B0G6FLGWH9) [**R134a Replacement with Stop Leak 4 Cans Total for AC Recharging**cmebiz**$54.45**167 rev1y ago](https://www.amazon.com/dp/B0DQVHTHPR) [**Errecom Extreme Ultra | A/C Leak Stop for Vehicle A/C Systems | Works with All Refrigerants and Lubricants | Includes R1234yf and R134a Adapters | 0.2 fl oz (6 mL) Cartridge**ERRECOM**$28.54**139 rev1y ago](https://www.amazon.com/dp/B0DBM58DXK) [**A/C Pro AC Super Seal R-134a Stop Leak Treatment - 3oz**InterDynamics**$35.79**357 rev7y ago](https://www.amazon.com/dp/B07RK5BXTW) [**Red Angel A/C Stop Leak & Conditioner by BlueDevil Products**BlueDevil Products**$46.16**12 rev8y ago](https://www.amazon.com/dp/B01LRHWHVE)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**ERRECOM Extreme A/C Leak Stop for Vehicle A/C Systems | 3.6 OZ Aerosol Can**ERRECOM**$30.32**2.6★**▲ 152%**](https://www.amazon.com/dp/B0G6FLGWH9) [**Certified A/C Pro UV Leak Detection Kit**A/C Pro**$17.84**4.3★**▲ 57%**](https://www.amazon.com/dp/B003JOB594) [**Red Angel 49496 A/C Stop Leak - 2 Ounce (Pack of 6)**BlueDevil Products**$167.16**4.3★**▲ 51%**](https://www.amazon.com/dp/B00NIJUUCS) [**Leak Saver Direct Inject AC Leak Sealer | AC Stop Leak for Most HVAC Systems Up to 5 Tons | Works with All Systems & AC Refrigerants | Made in the USA**Leak Saver**$35.36**4.3★**▲ 43%**](https://www.amazon.com/dp/B071VMXMLS) [**R134a Replacement with Stop Leak 4 Cans Total for AC Recharging**cmebiz**$54.45**4.0★**▲ 37%**](https://www.amazon.com/dp/B0DQVHTHPR)
**~~View all trending →~~**
## **What buyers say about red angel a/c stop leak**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Leak-Proof**25%
*“Stop Leak”*
**Ease Of Use**11%
*“Easy to Use”*
**Quality-Overall**10%
*“Extremely pleased with results so far”*
**Value For Money**7%
*“A worthy Investment”*
**Advertised Vs Actual Product**7%
*“As advertised”*
**Functionality-Overall**4%
*“AFTER MANY ATTEMPTS WITH OTHER PRODUCTS TO STOP MY ANNOYING PICKUP TRUCK AIR CONDINING LEAK,,THIS SID THE JOB,,,FULL STOP”*
**Maintenance And Repair**4%
*“it can potentially save a significant amount of money compared to more extensive repairs”*
**Instructions/User Manual/Troubleshooting**4%
*“Instructions were easy to follow”*
**Efficiency**4%
*“This air conditioning additive is a very convenient solution for anyone looking to maintain their vehicle cooling system without a trip to a professional shop”*
**Compression**2%
*“I think it fixed the compressor leak in my 30 year old landcruiser”*
### **What buyers complain about **
**Leak-Proof**27%
*“Leaks”*
**Functionality-Overall**15%
*“Nothing will flow in or out”*
**Value For Money**7%
*“value is terrible”*
**Instructions/User Manual/Troubleshooting**5%
*“Follow the instructions EXACTLY, TO THE LETTER, and DO NOT DEVIATE from the steps or the order they are in”*
**Advertised Vs Actual Product**5%
*“This feels misleading”*
**Quality-Overall**4%
*“Garbage”*
**Heating**4%
*“the AC is far colder than it was before”*
**Design-Overall**3%
*“A designed scam”*
**Durability**3%
*“broke almost immediately”*
**Defective Material/Parts**2%
*“Product did not work at all”*
### **Top return reasons **
**Leak-Proof**21%
**Advertised Vs Actual Product**21%
**Compatibility-Overall**9%
**Functionality-Overall**8%
**Product Condition**7%
**Defective Material/Parts**6%
**Value For Money**5%
**Instructions/User Manual/Troubleshooting**4%
**Assembly/Installation**4%
**Size-Overall**4%
## **Common questions**
- **Is red angel a/c stop leak profitable to sell on Amazon United States?**
- The niche generates $52K/yr across 10 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +151.2%. Flapen's verdict: Worth a look (56/100).
- **How competitive is the red angel a/c stop leak niche?**
- 7 brands and 24 sellers compete. The top 5 products take 85% of clicks and top 5 brands hold 93% of demand.
- **What do buyers complain about in red angel a/c stop leak?**
- Top complaints mined from reviews: Leak-Proof, Functionality-Overall, Value For Money. The return rate is 0.8%.
- **When does demand for red angel a/c stop leak peak?**
- Demand peaks in May–Jun–Jul–Aug; the busiest month runs 6.8× the quietest.
- **What does it cost to enter the red angel a/c stop leak niche?**
- Listings span $17.84–$167.16; the average listing price is $47.01 (sweet spot $15–$100). The average incumbent carries 597 reviews — the moat a new listing must climb.
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