Is fluid film black profitable to sell on Amazon United States?

The niche generates $1.6M/yr across 15 tracked products. 90-day search growth is -0.2%. Flapen's verdict: Worth a look (54/100).

How competitive is the fluid film black niche?

3 brands and 118 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in fluid film black?

Top complaints mined from reviews: Rusts/Corrodes, Spray/Flow, Value For Money. The return rate is 0.1%.

When does demand for fluid film black peak?

Demand peaks in Oct–Nov; the busiest month runs 3.2× the quietest.

What does it cost to enter the fluid film black niche?

Listings span $8.44–$87.09; the average listing price is $37.05 (sweet spot $15–$100). The average incumbent carries 1,272 reviews — the moat a new listing must climb.

fluid film black

Worth a look

Shows low returns (0.1%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Conversion

Incredible12.8%

search→purchase rate — share of searches ending in a sale

Avg price

Incredible$37.05

avg listing price — sweet spot $15–$100

Price range

Great$8.44–$87.09

cheapest to priciest tracked listing — scored on the share inside $15–$100

Market size

Great$1.6M

$1.6M/yr · 327K searches

Review moat

Good1,272.07

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-0.2%

90-day search growth — must beat 0% to launch

Competition

Bad73%

top-5 click share — a locked-up shelf

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, fluid film black is a $1.6M/yr Amazon United States market (327K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Oct–Nov. Verdict: Worth a look — 54/100.

Data updated Jul 8, 2026 · scored weekly · How we score niches

fluid film black market data

Units sold / yr: 30K–40K; avg 1,500–2,000/product
Revenue / yr: $1.1M–$1.5M; units × avg price
Conversion rate: 12.8%
Avg BSR: #252
Page quality: 0%
Prime: 87%
Sponsored: 80%
Out of stock: 0.0%
Avg brand age: 77 months
Avg seller age: 172 days

Competition & brand share

The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 falling

Sellers

118

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

73%

Top 20: 100%

Open market

Boeshield75%
Fluid Film19%
CRC6%
Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -0.2% search growth over the last 90 days.

Peak months: Oct, Nov · busiest ÷ quietest = 3.2×

Open Trend

Top fluid film black search terms

boeshield t-964K/yr +16.4%15.3% conv.
fluid film black101K/yr -4.6%5.3% conv.
t9 lubricant spray can25K/yr -27.3%16.2% conv.
boeshield t-9 rust & corrosion protection15K/yr +25.8%17.3% conv.
salt shift rust shield15K/yr +30.2%0.1% conv.
boeshield10K/yr +28.0%10.8% conv.
t-9 lubricant/protectant10K/yr -25.5%16.5% conv.
boeshield t911K/yr -5.5%12.0% conv.
black fluid film14K/yr -13.3%5.7% conv.
crc marine corrosion inhibitor8K/yr +14.9%10.1% conv.

All search terms

Top fluid film black 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 15 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

BOESHIELD T-9 Rust & Corrosion Protection/Inhibitor and Waterproof Lubrication 12 oz.

Boeshield$20.504.7★5,494 rev

Boeshield T-9 Aerosol Can (4 -Ounce) (122184) White

Boeshield$15.584.7★3,767 rev

Boeshield T-9 Bicycle Chain Waterproof Lubricant and Rust Protection 4 oz Liquid Original Version (122183) White

Boeshield$12.724.7★3,767 rev

Fluid Film 11.75 oz Rust and Corrosion Inhibitor Spray Black 3 Pack Spray Can Extension Wand Can-Gun1 Premium Can Tool Aerosol Spray

Fluid Film$46.474.6★133 rev

Fluid Film Black Non-Aerosol Long Lasting Corrosion Penetrant & Lubricant Anti-Rust Coating Protects All Metals in Marine and Undercoating in Automotive & Snow-Handling Vehicles 1 Gallon

Fluid Film$50.764.6★1,221 rev

Newest

by launch date

Fluid Film 11.75 oz Rust and Corrosion Inhibitor Spray Black 3 Pack Spray Can Extension Wand Can-Gun1 Premium Can Tool Aerosol Spray

Fluid Film$46.47133 rev

1y ago

Fluid Film 11.75 oz Rust and Corrosion Inhibitor Black 6 Pack Spray Can Extension Wand Can-Gun1 Premium Tool Aerosol Spray

Fluid Film$87.09103 rev

1y ago

Fluid Film Black (3 Aerosol Cans) with DU-Most 2 Extension Hose & Nozzle Long Lasting Corrosion Prevention Penetrant & Lubricant Marine Automotive & Snow-Handling Vehicles Undercoating 11.75 Oz

Fluid Film$52.15134 rev

2y ago

Stens FLUID FILM 752-515 Rust and Corrosion Protection-11.75 oz. aerosol can Multi

Fluid Film$14.55396 rev

5y ago

Fluid Film Black (6 Aerosol Cans) with DU-Most 2 Extension Hose & Nozzle Long Lasting Corrosion Prevention Penetrant & Lubricant Marine Automotive & Snow-Handling Vehicles Undercoating 11.75 Oz

Fluid Film$85.04249 rev

5y ago

What buyers say about fluid film black

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall21%

“Fair rating”

Rusts/Corrodes20%

“always appreciated its rust protection capabilities”

Value For Money10%

“Worth the money”

Advertised Vs Actual Product8%

“As advertised”

Efficiency5%

“a very effective productive product I learned about in Sail Magazine”

Ease Of Use5%

“easy to use”

Spray/Flow3%

“Very easy to spray on”

Ease Of Cleaning3%

“The cleaner does its job”

Durability3%

“has held up well”

Drop/Impact Protection2%

“saw how well it protected”

What buyers complain about

Rusts/Corrodes18%

“have a problem with rusting”

Spray/Flow15%

“Stopped spraying”

Value For Money12%

“it is pretty expensive”

Size-Overall5%

“it did not fit well on the cans”

Ease Of Cleaning4%

“A real mess”

Stain Resistance3%

“The black die is unnecessary and only causes a mess and stains clothing”

Jamming/Clogging3%

“the drop wise applicator constantly clogs”

Instructions/User Manual/Troubleshooting3%

“It's not easy to use without readable instructions that aren't covered with barcode sticker”

Color2%

“The black die is unnecessary and only causes a mess and stains clothing”

Add-Ons/Attachments2%

“Can extension does not fit well”

Top return reasons

Leak-Proof52%

Color9%

Functionality-Overall7%

Advertised Vs Actual Product5%

Spray/Flow5%

Inflation/Deflation3%

Value For Money3%

Ease Of Use3%

Product Condition3%

Defective Material/Parts3%

Common questions

Is fluid film black profitable to sell on Amazon United States?: The niche generates $1.6M/yr across 15 tracked products. 90-day search growth is -0.2%. Flapen's verdict: Worth a look (54/100).
How competitive is the fluid film black niche?: 3 brands and 118 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in fluid film black?: Top complaints mined from reviews: Rusts/Corrodes, Spray/Flow, Value For Money. The return rate is 0.1%.
When does demand for fluid film black peak?: Demand peaks in Oct–Nov; the busiest month runs 3.2× the quietest.
What does it cost to enter the fluid film black niche?: Listings span $8.44–$87.09; the average listing price is $37.05 (sweet spot $15–$100). The average incumbent carries 1,272 reviews — the moat a new listing must climb.