--- title: "seafoam marine — Niche Verdict: Skip it (35/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/automotive/seafoam-marine" last_updated: "2026-07-09T21:49:51.698Z" locale: en meta: description: "a concentrated shelf (top 5 take 91% of clicks) — seafoam marine doesn't clear our bar today." "og:description": "a concentrated shelf (top 5 take 91% of clicks) — seafoam marine doesn't clear our bar today." "og:title": "seafoam marine — Niche Verdict: Skip it (35/100) | Amazon United States - Flapen" --- Back to Flapen home # **seafoam marine** **Skip it****35/100 ** a concentrated shelf (top 5 take 91% of clicks) — seafoam marine doesn't clear our bar today. **Market/yr** **$95K** **Growth (1y)** **+171.9%** **Products** **8** **Brands** **4** was 2 a year ago **Sellers** **86** **Price range** **$11.14–$136.38** **Returns** **0.2%** **Rating** **4.8★** **Skip it** Scored 35/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **5** ×0.30 Growth **73** ×0.30 Competition **0** ×0.20 Quality gap **20** ×0.10 Returns **99** ×0.10 ## **Demand** Weekly Amazon search volume, last 13 weeks — +171.9% year over year. 1K685.5Spike '26Apr '26Apr '26May '26May '26Jun '26Jun '26Jul '26 ## **Competition** - Sea Foam46% - STA-BIL39% - KITLEY12% - Generic3% - Other0% The top 5 products capture 91% of clicks — a locked-up shelf that new listings rarely crack. 4 brands and 86 sellers compete here. **Brands** **4 **▲rising was 2 a year ago **Sellers** **86** **Top 5 brand share** **100%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![Sea Foam Marine PRO Marine Fuel System Treatment MP20 20 oz Pack of 3](https://m.media-amazon.com/images/I/516KnKvQOqL.jpg) [**Sea Foam Marine PRO Marine Fuel System Treatment MP20 20 oz Pack of 3**](https://www.amazon.com/dp/B0FL9Z518N) Sea Foam$39.334.8★1,00335%▲rising 2 ![STA-BIL 360 Marine Fuel System Treatment 32 oz](https://m.media-amazon.com/images/I/4148vEsX+cL.jpg) [**STA-BIL 360 Marine Fuel System Treatment 32 oz**](https://www.amazon.com/dp/B001CAW2DK) STA-BIL$22.254.8★8,04333%▲rising 3 ![KITLEY Marine PRO Marine Fuel System Treatment MP20](https://m.media-amazon.com/images/I/3136S5kbctL.jpg) [**KITLEY Marine PRO Marine Fuel System Treatment MP20**](https://www.amazon.com/dp/B0G2YD423Y) KITLEY$21.045.0★312%▲rising 4 ![STA-BIL Marine Tune-Up Fuel Treatment Cleans Carburetors and Injectors Fixes Rough Running Engines Eliminates Water Treats up to 20 Gallons 8 oz. (22313) Blue 8oz](https://m.media-amazon.com/images/I/31mASGW3e8L.jpg) [**STA-BIL Marine Tune-Up Fuel Treatment Cleans Carburetors and Injectors Fixes Rough Running Engines Eliminates Water Treats up to 20 Gallons 8 oz. (22313) Blue 8oz**](https://www.amazon.com/dp/B00NEG3SQ0) STA-BIL$11.144.7★4906%—flat 5 ![Sea Foam Marine PRO Marine Fuel System Treatment MP20 20 oz Pack of 1](https://m.media-amazon.com/images/I/41exnpZ0BzL.jpg) [**Sea Foam Marine PRO Marine Fuel System Treatment MP20 20 oz Pack of 1**](https://www.amazon.com/dp/B071LLP5VB) Sea Foam$14.534.8★1,0035%▼falling 6 ![Marine Fuel System Treatment 2 Bottles (40 oz / 1.18 L Total) | Fuel Stabilizer & Cleaner for Boats Outboards & PWCs | Helps Restore Power & Improve Efficiency](https://m.media-amazon.com/images/I/41o972G9YWL.jpg) [**Marine Fuel System Treatment 2 Bottles (40 oz / 1.18 L Total) | Fuel Stabilizer & Cleaner for Boats Outboards & PWCs | Helps Restore Power & Improve Efficiency**](https://www.amazon.com/dp/B0FVNTHXWR) Generic$34.365.0★33%▲rising 7 ![Sea Foam Motor Treatment | Fuel System Cleaner Fuel Stabilizer & Oil Treatment | Gas & Diesel Additive for Cars & Trucks | 16 oz Pack of 3](https://m.media-amazon.com/images/I/51P9WNOTMJL.jpg) [**Sea Foam Motor Treatment | Fuel System Cleaner Fuel Stabilizer & Oil Treatment | Gas & Diesel Additive for Cars & Trucks | 16 oz Pack of 3**](https://www.amazon.com/dp/B07CL5Q89T) Sea Foam$30.074.8★8,3703%▼falling 8 ![MP20 20OZ Seafoam Marine Pro - Quantity 12](https://m.media-amazon.com/images/I/515Ut7X81vL.jpg) [**MP20 20OZ Seafoam Marine Pro - Quantity 12**](https://www.amazon.com/dp/B08DRVHNFG) Sea Foam$136.384.7★513%▼falling ## **Product shelf** All 8 tracked products in this niche. Top sellersNewestTrending [![Sea Foam Marine PRO Marine Fuel System Treatment MP20 20 oz Pack of 3](https://m.media-amazon.com/images/I/516KnKvQOqL.jpg)**Sea Foam Marine PRO Marine Fuel System Treatment MP20 20 oz Pack of 3** Sea Foam**$39.33**4.8★1,003 reviews](https://www.amazon.com/dp/B0FL9Z518N) [![STA-BIL 360 Marine Fuel System Treatment 32 oz](https://m.media-amazon.com/images/I/4148vEsX+cL.jpg)**STA-BIL 360 Marine Fuel System Treatment 32 oz** STA-BIL**$22.25**4.8★8,043 reviews](https://www.amazon.com/dp/B001CAW2DK) [![KITLEY Marine PRO Marine Fuel System Treatment MP20](https://m.media-amazon.com/images/I/3136S5kbctL.jpg)**KITLEY Marine PRO Marine Fuel System Treatment MP20** KITLEY**$21.04**5.0★3 reviews](https://www.amazon.com/dp/B0G2YD423Y) [![STA-BIL Marine Tune-Up Fuel Treatment Cleans Carburetors and Injectors Fixes Rough Running Engines Eliminates Water Treats up to 20 Gallons 8 oz. (22313) Blue 8oz](https://m.media-amazon.com/images/I/31mASGW3e8L.jpg)**STA-BIL Marine Tune-Up Fuel Treatment Cleans Carburetors and Injectors Fixes Rough Running Engines Eliminates Water Treats up to 20 Gallons 8 oz. (22313) Blue 8oz** STA-BIL**$11.14**4.7★490 reviews](https://www.amazon.com/dp/B00NEG3SQ0) [![Sea Foam Marine PRO Marine Fuel System Treatment MP20 20 oz Pack of 1](https://m.media-amazon.com/images/I/41exnpZ0BzL.jpg)**Sea Foam Marine PRO Marine Fuel System Treatment MP20 20 oz Pack of 1** Sea Foam**$14.53**4.8★1,003 reviews](https://www.amazon.com/dp/B071LLP5VB) [![Marine Fuel System Treatment 2 Bottles (40 oz / 1.18 L Total) | Fuel Stabilizer & Cleaner for Boats Outboards & PWCs | Helps Restore Power & Improve Efficiency](https://m.media-amazon.com/images/I/41o972G9YWL.jpg)**Marine Fuel System Treatment 2 Bottles (40 oz / 1.18 L Total) | Fuel Stabilizer & Cleaner for Boats Outboards & PWCs | Helps Restore Power & Improve Efficiency** Generic**$34.36**5.0★3 reviews](https://www.amazon.com/dp/B0FVNTHXWR) [![Sea Foam Motor Treatment | Fuel System Cleaner Fuel Stabilizer & Oil Treatment | Gas & Diesel Additive for Cars & Trucks | 16 oz Pack of 3](https://m.media-amazon.com/images/I/51P9WNOTMJL.jpg)**Sea Foam Motor Treatment | Fuel System Cleaner Fuel Stabilizer & Oil Treatment | Gas & Diesel Additive for Cars & Trucks | 16 oz Pack of 3** Sea Foam**$30.07**4.8★8,370 reviews](https://www.amazon.com/dp/B07CL5Q89T) [![MP20 20OZ Seafoam Marine Pro - Quantity 12](https://m.media-amazon.com/images/I/515Ut7X81vL.jpg)**MP20 20OZ Seafoam Marine Pro - Quantity 12** Sea Foam**$136.38**4.7★51 reviews](https://www.amazon.com/dp/B08DRVHNFG) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Fuel Efficiency**18% *“Great product help clean my boat motor from fuel lines to carbs even inside where the cylinders are”* **Quality-Overall**16% *“Significant improvement”* **Value For Money**14% *“competitive price”* **Motor Power**10% *“helps turn on cranky motors”* **Efficiency**10% *“Worked well”* **Ease Of Cleaning**8% *“Clean motor”* **Advertised Vs Actual Product**5% *“Works as advertised”* **Lubrication**5% *“Its a great product for keeping your carburetors and injectors, clean and your vehicles or mowers”* **Measurement/Reading Accuracy**3% *“Bottle is perfect for measuring out the right amount”* **Coolant**3% *“So I had a Polaris Outlaw 110 EFI, when started cold it kept shutting off and ran rough, mixed a can of this 50/50 with gas and ran it through and now it purrs like a kitten, definitely works”* ### **What buyers complain about ** **Fuel Efficiency**50% *“Failed to clean out gas in my carburetor”* **Water Resistance**33% *“Had water in my gas”* **Ease Of Cleaning**17% *“Failed to clean out gas in my carburetor”* #### **Top return reasons**- Value For Money36% - Leak-Proof36% - Size-Overall18% - Functionality-Overall7% - Advertised Vs Actual Product4%