Is fluid film spray gun profitable to sell on Amazon United States?

The niche generates $292K/yr across 23 tracked products. 1 of 6 products launched in the last 360 days are still selling. 90-day search growth is -10.3%. Flapen's verdict: Worth a look (55/100).

How competitive is the fluid film spray gun niche?

16 brands and 73 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 74% of demand.

What do buyers complain about in fluid film spray gun?

Top complaints mined from reviews: Spray/Flow, Quality-Overall, Durability. The return rate is 1.5%.

When does demand for fluid film spray gun peak?

Demand peaks in Sep–Oct–Nov; the busiest month runs 3.5× the quietest.

What does it cost to enter the fluid film spray gun niche?

Listings span $13.72–$149.94; the average listing price is $54.13 (sweet spot $15–$100). The average incumbent carries 321 reviews — the moat a new listing must climb.

fluid film spray gun

Worth a look

Shows a sweet-spot price point ($54.13 avg), but soft demand (-10.3% this quarter) keeps it on the watch list.

Avg price

Great$54.13

avg listing price — sweet spot $15–$100

Returns

Great1.5%

return rate — above 5% kills the launch gate

Review moat

Great321.04

avg incumbent reviews — the moat a new listing must climb

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Price range

Good$13.72–$149.94

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

Brand share

Good74%

top-5 brand share — brands hold most of the demand

Market size

Good$292K

$292K/yr · 154K searches

Conversion

Okay3.5%

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

Competition

Okay60%

top-5 click share — leaders hold, buyers still browse

Growth

Bad-10.3%

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

Signals High Price

According to Flapen's Amazon United States niche tracking, fluid film spray gun is a $292K/yr Amazon United States market (154K searches/yr). The top 5 brands hold 74% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Worth a look — 55/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

fluid film spray gun market data

Units sold / yr: 6K–8K; avg 250–500/product
Revenue / yr: $325K–$433K; units × avg price
Conversion rate: 3.5%
Avg BSR: #232
Page quality: 0%
Prime: 74%
Sponsored: 78%
Out of stock: 8.4%
Avg brand age: 53 months
Avg seller age: 171 days

Competition & brand share

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 falling

Sellers

Top-5 brand share

74%

Top 20: 100%

Top-5 click share

60%

Top 20: 97%

Open market

22%

Fluid Film24%
InoKraft22%
Generic12%
TCP Global9%
DurionAuto8%
Master Airbrush5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -10.3% search growth over the last 90 days.

Peak months: Sep, Oct, Nov · busiest ÷ quietest = 3.5×

Open Trend

Top fluid film spray gun search terms

undercoating spray gun45K/yr -17.3%4.1% conv.
fluid film spray gun39K/yr -19.8%4.3% conv.
fluid film kit13K/yr +16.8%2.0% conv.
undercoating gun13K/yr +12.0%4.4% conv.
undercoating sprayer4K/yr +25.7%2.5% conv.
fluid film sprayer7K/yr -19.4%3.5% conv.
undercoat spray gun6K/yr +14.4%4.3% conv.
fluid film gun7K/yr -11.2%5.0% conv.
fluid film undercoating kit8K/yr -26.4%1.4% conv.
under coating spray guns5K/yr -24.5%3.2% conv.

All search terms

Top fluid film spray gun 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 23 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

InoKraft Undercoating Spray Gun Kit with Suction Feed Cup 360 Flexible Wand & Straight Hose for Truck Bed Liner Underseal Rubberized Undercoating & Rust Proofing

InoKraft$47.304.5★461 rev

Fluid Film FFSG Spray Gun Applicator Kit

Fluid Film$122.094.4★326 rev

Complete FF Lanolin Undercoating Fluid Pro Undercoating Gun - 2 Wand Kit (3 W Quart Bottles)

Generic$149.944.6★6 rev

Undercoating Spray Gun with Suction Feed Cup 360 & Straight Spray Hoses for Truck Bed Liner Coating Rubberized Undercoat Rust Proofing (Gray)

DurionAuto$40.754.5★22 rev

TCP Global Air Undercoating Spray Gun with Gauge Suction Feed Cup & 2 Wands - 22 Long Flexible Extension Wand with Multi-Directional Nozzle - Sprayable Bed Liner Rubberized Truck Undercoating

TCP Global$36.733.8★1,576 rev

Newest

by launch date

Undercoating Spray Gun with Suction Feed Cup 360 & Straight Spray Hoses for Truck Bed Liner Coating Rubberized Undercoat Rust Proofing (Gray)

DurionAuto$40.7522 rev

5mo ago

Undercoating Spray Gun with Suction Feed Cup 360 Flexible Wand & Filter Screen Cover & Air Pressure Regulator Rubberized Coating Sprayer for Truck Bed Liner Rust Proofing and Chassis Protection

RIRC$41.3010 rev

5mo ago

InoKraft Undercoating Spray Gun for Truck Bed Liner Coating Rubberized Undercoat Rust Proofing (Basic Model)

InoKraft$31.4666 rev

10mo ago

ChgImposs Undercoating Spray Gun Kit 34 fl oz / 1 Liter Cup Fluid Film Rust Proofing Gun for Truck Bed Liner Car Underbody Coating Rubberized Protective Spray Tool with Hoses (Grey)

ChgImposs$31.254 rev

10mo ago

GS Undercoating Spray Gun Kit Undercoating Gun for Vehicles Truck Bed Liner Coating Rubberized Undercoat Car Rust Proofing Bedliner Under Coating Gun with Suction Feed Cup 360 Spray Hoses

GRACESELECT$40.578 rev

11mo ago

What buyers say about fluid film spray gun

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

What buyers love

Quality-Overall16%

“Great kit and great product”

Value For Money16%

“Worth the money”

Spray/Flow12%

“Sprays on well with spray gun found here on Amazon”

Efficiency8%

“Worked well using wool wax”

Advertised Vs Actual Product8%

“Worked as advertised”

Rusts/Corrodes7%

“It works great on the rust”

Ease Of Cleaning3%

“cleanup quicker than you might expect”

Durability3%

“it's been super reliable”

Ease Of Use3%

“which was very easy to do”

Lubrication3%

“Works great for fluid film”

What buyers complain about

Spray/Flow15%

“Wont spray at all”

Quality-Overall13%

“Not good quality you can do better”

Durability7%

“Broke immediately”

Add-Ons/Attachments6%

“the extension tube hardly works at all”

Instructions/User Manual/Troubleshooting6%

“No user manual”

Size-Overall5%

“it did not fit well on the cans”

Ease Of Cleaning5%

“Dirty”

Rusts/Corrodes4%

“the rusty spots on the bed and bumper”

Paint Quality3%

“Would not spray paint through tube with five holes”

Leak-Proof3%

“Leaks, cup does not stay tight, wands never worked”

Top return reasons

Spray/Flow20%

Leak-Proof13%

Defective Material/Parts12%

Functionality-Overall10%

Size-Overall7%

Advertised Vs Actual Product5%

Add-Ons/Attachments3%