Rear Main Seal Stop Leak
FailThe top 5 brands take 98% of clicks, so Rear Main Seal Stop Leak is a Fail.
- Flapen Score
- 40 / 100Ranks 6,010 of 7,287 Automotive niches · −9 vs the category median of 4940
- Market size
- $69K/yr33K searches / yr
- 90-day growth
- -8.3%search demand this quarter
- Competition
- 83%top-5 click share · 6 brands · 89 sellers
Flapen Score
Rear Main Seal Stop Leak against its category
The dotted line is the Automotive average. Past it, Rear Main Seal Stop Leak is stronger. Inside it, weaker.
Market
The Rear Main Seal Stop Leak market on Amazon at a glance
Shoppers on Amazon United States searched for Rear Main Seal Stop Leak 33K times last year and spent an estimated $69K. The top 5 brands take 98% of clicks. Flapen scores it 40 out of 100, a Fail.
01 · Demand
An estimated 5.5% of those searches ended in a purchase.
Shoppers searched for this 33K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 5.5% of those searches ended in a purchase. Searches in the last 90 days moved -8.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $69K a year.
- Searches, last 12 months
- 33K
- Growth, 90 days vs prior 90
- -8.3%
- Conversion, latest week
- 5.5%
- Market size, estimated
- $69Ka year
- Peak month
- April1.5× the quietest month
- Top search term
- rear main seal stop leak22K searches a year
02 · Price
A sale here is worth $37.88.
Listings sell for $37.88 on average, from $9.55 to $198.26. Amazon reports units sold in ranges. This niche sold 3K to 4K a year. The average listing sells 250 to 500 of them. At $37.88 that is $9K to $19K a year per listing.
- Average price
- $37.88inside the $15 to $100 sweet spot
- Price range
- $9.55–$198.26
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 3K–4K
- Units per listing a year
- 250–500
- Revenue per listing a year
- $9K–$19K
- Returns
- 0.6%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
100% of listings pay for placement with sponsored ads. 89% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #768 within Fillers, Adhesives & Sealants. It carries 5,039 reviews at 4.28 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 100%
- Prime listings
- 89%
- Out of stock, average day
- 0.0%
- Average rank
- #768in Fillers, Adhesives & Sealants
- Average rating
- 4.28 starsAmazon United States average 4.42 stars
- Average reviews
- 5,039per listing
- Listings tracked
- 9
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 104 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 104 months
Products
Top Rear Main Seal Stop Leak 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 8, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Bars Leaks Rear Main Seal Repair 16.9 oz
- Price
- $9.55
- Rating
- 4.2/5
- Reviews
- 3,146
- Age
- 14y ago

BlueDevil Products 00234 Rear Main Sealer - 8 Ounce
- Price
- $15.10
- Rating
- 4.1/5
- Reviews
- 3,553
- Age
- 17y ago

ATP Automotive AT-205 Re-Seal Stops Leaks 8 Ounce Bottle 1-Pack
- Price
- $21.01
- Rating
- 4.5/5
- Reviews
- 21,809
- Age
- 22y ago

BlueDevil Products 49499 Oil Stop Leak - 8 Ounce
- Price
- $18.92
- Rating
- 4.1/5
- Reviews
- 3,440
- Age
- 19y ago

BlueDevil Products 00234 Rear Main Sealer - 8 Ounce (Pack of 12)
- Price
- $198.26
- Rating
- 4.1/5
- Reviews
- 3,553
- Age
- 1y ago
Trending
estimated 90-day click momentum
BlueDevil Products 00234 Rear Main Sealer - 8 Ounce (Pack of 12)
- Price
- $198.26
- Rating
- 4.1/5
- Reviews
- 3,553
- Age
- 1y ago

LM 1005 Oil Leak Stop 300 ml
- Price
- $20.19
- Rating
- 4.4/5
- Reviews
- 7,512
- Age
- 13y ago

BlueDevil Products 49499 Oil Stop Leak - 8 Ounce
- Price
- $18.92
- Rating
- 4.1/5
- Reviews
- 3,440
- Age
- 19y ago

BlueDevil Products Hydraulic Stop Leak 32 oz | Restores Seals & Stops Leaks in Hydraulic Systems | Safe for Pumps Cylinders & Valves
- Price
- $23.88
- Rating
- 4.3/5
- Reviews
- 622
- Age
- 13y ago

XADO ATOMEX Oil Additive Stop Leak Engine - Restore Seal and Gaskets Treatment for Car Engine High Mileage or Rear Main Seal Best Stopper Leaks Reseal (Bottle 250 ml)
- Price
- $21.93
- Rating
- 4.2/5
- Reviews
- 368
- Age
- 12y ago
Newest
by launch date
BlueDevil Products 00234 Rear Main Sealer - 8 Ounce (Pack of 12)
- Price
- $198.26
- Rating
- 4.1/5
- Reviews
- 3,553
- Age
- 1y ago

Lucas Oil 10278 Engine Oil Stop Leak - 1 Quart
- Price
- $12.04
- Rating
- 4.6/5
- Reviews
- 1,346
- Age
- 9y ago

XADO ATOMEX Oil Additive Stop Leak Engine - Restore Seal and Gaskets Treatment for Car Engine High Mileage or Rear Main Seal Best Stopper Leaks Reseal (Bottle 250 ml)
- Price
- $21.93
- Rating
- 4.2/5
- Reviews
- 368
- Age
- 12y ago

BlueDevil Products Hydraulic Stop Leak 32 oz | Restores Seals & Stops Leaks in Hydraulic Systems | Safe for Pumps Cylinders & Valves
- Price
- $23.88
- Rating
- 4.3/5
- Reviews
- 622
- Age
- 13y ago

LM 1005 Oil Leak Stop 300 ml
- Price
- $20.19
- Rating
- 4.4/5
- Reviews
- 7,512
- Age
- 13y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 83% of clicks. A locked shelf that new listings rarely crack.
Brands
6 rising
Sellers
89
Est. top-5 brand share
98%
Top 20: 100%
Est. top-5 click share
83%
Top 20: 100%
Open market
0%
- BlueDevil Products42%
- Bar's Leaks31%
- atp automotive12%
- XADO8%
- Lucas Oil5%
- Liqui Moly2%
- Open — no brand owns it (0%)
Demand
Rear Main Seal Stop Leak search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.5×
Search terms
Top Rear Main Seal Stop Leak search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- rear main seal stop leak22K/yr
- blue devil rear main sealer11K/yr
- rear main seal stop leak additive145/yr
- blue devil rear main seal leak stop14/yr
Reviews and returns
What reviews say buyers love and hate about Rear Main Seal Stop Leak
We read the reviews and the return reasons for every product selling here.
“for being a slight leak”
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 Rear Main Seal Stop Leak 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









