---
title: "Hydraulic Stop Leak — $97K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/hydraulic-stop-leak"
last_updated: "2026-08-10T21:48:30.902Z"
locale: en
meta:
description: "Niche score 49/100 · $97K/yr market · 5K searches/yr · $60.70 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 49/100 · $97K/yr market · 5K searches/yr · $60.70 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Hydraulic Stop Leak — $97K/yr Amazon US Niche (2026) - Flapen"
---
# **hydraulic stop leak**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 24Growth 43Conversion 100Competition 5Returns 95Price range 75Avg price 89Brand share 0Review moat 81Quality gap 68
**Conversion**
**Incredible****29.7%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****1.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$60.70**
avg listing price — sweet spot $15–$100
**Review moat**
**Great****386**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Great****$13.40–$126.03**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Growth**
**Okay****+14.4%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$97K**
$97K/yr · 5K searches
**Competition**
**Bad****94%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, hydraulic stop leak is a $97K/yr Amazon United States market (5K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 49/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **hydraulic stop leak market data**
- **Units sold / yr**
- **1K–2K**
- avg 100–250/product
- **Revenue / yr**
- **$76K–$91K**
- units × avg price
- **Conversion rate**
- **29.7%**
- **Avg BSR**
- **#82**
- **Page quality**
- **0%**
- **Prime**
- **57%**
- **Sponsored**
- **71%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **161 months**
- **Avg seller age**
- **169 days**
## **Competition & brand share**
The top 5 products capture 94% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**3 **▼falling
**Sellers**
**93**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**94%**
Top 20: 100%
**Open market**
**0%**
- Lucas Oil81% - BlueDevil Products17% - Bar's Leaks3%
## **Demand**
Weekly Amazon search volume, last 8 weeks — +14.4% search growth over the last 90 days.
175125May '26May '26May '26Jun '26Jun '26Jun '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/us/automotive/hydraulic-stop-leak/trend)
## **Top hydraulic 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%$14K30%$29K45%$43K60%$58K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 7 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Hydraulic Oil Booster/STO**Lucas Oil**$31.86**4.6★809 rev](https://www.amazon.com/dp/B000FW2N08) [2**Lucas Oil 10019 Hydraulic Oil Booster and Stop Leak - 1 Quart White 32 Ounce**Lucas Oil**$13.40**4.6★943 rev](https://www.amazon.com/dp/B0002JMLW4) [3**BlueDevil Products Hydraulic Stop Leak 32 oz | Restores Seals & Stops Leaks in Hydraulic Systems | Safe for Pumps Cylinders & Valves**BlueDevil Products**$23.88**4.3★622 rev](https://www.amazon.com/dp/B00D46NSTM) [4**Lucas Oil 10018 Hydraulic Oil Booster & Stop Leak - 1 Gallon (Pack of 4)**Lucas Oil**$105.59**4.7★77 rev](https://www.amazon.com/dp/B008RWA1EI) [5**Hydraulic Oil Booster/Stop Leak/1x1/5 Gallon Pail**Lucas Oil**$126.03**3.0★1 rev](https://www.amazon.com/dp/B00T3MOP34)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Bars Leaks H60 Hydraulic Seal Stop Leak & Conditioner 32. Fluid_Ounces 1 Quart**Bar's Leaks**$16.35**228 rev7y ago](https://www.amazon.com/dp/B005ETQD62) [**BlueDevil Products Hydraulic Stop Leak 32 oz | Restores Seals & Stops Leaks in Hydraulic Systems | Safe for Pumps Cylinders & Valves**BlueDevil Products**$23.88**622 rev13y ago](https://www.amazon.com/dp/B00D46NSTM) [**Lucas Oil 10018 Hydraulic Oil Booster & Stop Leak - 1 Gallon (Pack of 4)**Lucas Oil**$105.59**77 rev13y ago](https://www.amazon.com/dp/B008RWA1EI) [**Lucas Oil Hydraulic Oil Booster and Stop Leak 1 gal Case of 4 P/N 10018-4**Lucas Oil**$107.80**22 rev14y ago](https://www.amazon.com/dp/B01M24GDPV) [**Hydraulic Oil Booster/Stop Leak/1x1/5 Gallon Pail**Lucas Oil**$126.03**1 rev18y ago](https://www.amazon.com/dp/B00T3MOP34)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Hydraulic Oil Booster/Stop Leak/1x1/5 Gallon Pail**Lucas Oil**$126.03**3.0★**▲ 127%**](https://www.amazon.com/dp/B00T3MOP34) [**Lucas Oil Hydraulic Oil Booster and Stop Leak 1 gal Case of 4 P/N 10018-4**Lucas Oil**$107.80**4.9★**▲ 27%**](https://www.amazon.com/dp/B01M24GDPV) [**Hydraulic Oil Booster/STO**Lucas Oil**$31.86**4.6★**▲ 12%**](https://www.amazon.com/dp/B000FW2N08) [**Lucas Oil 10018 Hydraulic Oil Booster & Stop Leak - 1 Gallon (Pack of 4)**Lucas Oil**$105.59**4.7★**— 2%**](https://www.amazon.com/dp/B008RWA1EI) [**Lucas Oil 10019 Hydraulic Oil Booster and Stop Leak - 1 Quart White 32 Ounce**Lucas Oil**$13.40**4.6★**— 6%**](https://www.amazon.com/dp/B0002JMLW4)
**~~View all trending →~~**
## **What buyers say about hydraulic stop leak**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Leak-Proof**24%
*“Not an expensive leak”*
**Quality-Overall**18%
*“Quality product”*
**Advertised Vs Actual Product**11%
*“It does the job”*
**Value For Money**6%
*“Much cheaper than replacing seals”*
**Efficiency**6%
*“Works Good”*
**Functionality-Overall**6%
*“Seems to be doing a good job”*
**Lubrication**6%
*“Good product used 3 bottles to stop hydraulic oil leaking in transmission”*
**Assembly/Installation**3%
*“Directions are easy”*
**Durability**3%
*“it lasts a long time”*
**Maintenance And Repair**3%
*“This fixed a very expensive repair”*
### **What buyers complain about **
**Functionality-Overall**22%
*“Didn't work like it was supposed to do”*
**Leak-Proof**22%
*“in fact the other cylinder developed a leak also”*
**Value For Money**17%
*“It costs half as much in shipping to return it”*
**Add-Ons/Attachments**11%
*“Difficult to add”*
**Thickness**6%
*“Oil was so thick”*
**Maintenance And Repair**6%
*“I would like a replacement”*
### **Top return reasons **
**Leak-Proof**33%
**Compatibility-Overall**15%
**Advertised Vs Actual Product**12%
**Value For Money**12%
**Certifications**6%
**Scratch Resistance**3%
**Adhesion/Stickiness**3%
**Functionality-Overall**3%
**Software/Application**3%
**Lubrication**3%
## **Common questions**
- **Is hydraulic stop leak profitable to sell on Amazon United States?**
- The niche generates $97K/yr across 7 tracked products. 90-day search growth is +14.4%. Flapen's verdict: Skip it (49/100).
- **How competitive is the hydraulic stop leak niche?**
- 3 brands and 93 sellers compete. The top 5 products take 94% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in hydraulic stop leak?**
- Top complaints mined from reviews: Functionality-Overall, Leak-Proof, Value For Money. The return rate is 1.0%.
- **What does it cost to enter the hydraulic stop leak niche?**
- Listings span $13.40–$126.03; the average listing price is $60.70 (sweet spot $15–$100). The average incumbent carries 386 reviews — the moat a new listing must climb.
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