Is masking fluid pen profitable to sell on Amazon United States?

The niche generates $47K/yr across 23 tracked products. 2 of 10 products launched in the last 360 days are still selling. 90-day search growth is +1.5%. Flapen's verdict: Worth a look (56/100).

How competitive is the masking fluid pen niche?

16 brands and 55 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 67% of demand.

What do buyers complain about in masking fluid pen?

Top complaints mined from reviews: Moist/Dry, Ease Of Use, Functionality-Overall. The return rate is 0.7%.

When does demand for masking fluid pen peak?

Demand peaks in Oct–Nov–Dec; the busiest month runs 3.0× the quietest.

What does it cost to enter the masking fluid pen niche?

Listings span $6.44–$29.03; the average listing price is $13.21 (sweet spot $15–$100). The average incumbent carries 724 reviews — the moat a new listing must climb.

masking fluid pen

Worth a look

Shows low returns (0.7%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Quality gap

Great4.1★

avg incumbent rating — lower means beatable quality

Conversion

Good6.6%

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

Review moat

Good723.96

avg incumbent reviews — the moat a new listing must climb

Brand share

Good67%

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

Price range

Good$6.44–$29.03

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

Competition

Good49%

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

Avg price

Good$13.21

avg listing price — sweet spot $15–$100

Growth

Okay+1.5%

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

Market size

Bad$47K

$47K/yr · 54K searches

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, masking fluid pen is a $47K/yr Amazon United States market (54K searches/yr). The top 5 brands hold 67% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Worth a look — 56/100.

Data updated Jul 10, 2026 · scored weekly · How we score niches

masking fluid pen market data

Units sold / yr: 4K–5K; avg 100–250/product
Revenue / yr: $53K–$66K; units × avg price
Conversion rate: 6.6%
Avg BSR: #486
Page quality: 0%
Prime: 100%
Sponsored: 70%
Out of stock: 1.4%
Avg brand age: 56 months
Avg seller age: 177 days

Competition & brand share

The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 falling

Sellers

Top-5 brand share

67%

Top 20: 100%

Top-5 click share

49%

Top 20: 98%

Open market

26%

Feifeiya30%
Generic12%
MOLOTOW9%
DANIEL SMITH8%
Sinbana8%
LOONENG7%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +1.5% search growth over the last 90 days.

Peak months: Oct, Nov, Dec · busiest ÷ quietest = 3.0×

Open Trend

Top masking fluid pen search terms

masking fluid pen24K/yr +4.5%6.6% conv.
masking fluid pen for watercolor painting10K/yr +5.7%7.4% conv.
watercolor masking fluid pen9K/yr +1.8%8.9% conv.
masking pen4K/yr -11.6%5.9% conv.
masking pen for watercolor4K/yr -16.4%7.5% conv.
molotow masking fluid pen3K/yr +13.0%11.8% conv.

All search terms

Top masking fluid pen 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★)1 product missing review or click data not plotted

All 23 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Feifeiya 3 Pcs 2 Blue Masking Fluid Pen for Watercolor Painting with 1 Cleaning Eraser 0.7mm and 3.0mm Masking Fluid Marker Applicator Tip for Watercolor Ink Various Art Projects Gouache Painting

Feifeiya$13.633.5★32 rev

2 Pack Masking Fluid Pens for Watercolor Painting 3mm 10ml Capacity & 0.7mm 3ml Applicator Tip with 2 Erasers - Blue Liquid Masking for Various Art Projects Watercolor Ink

Generic$14.533.9★80 rev

DANIEL SMITH 1oz Bottle with 5 Applicator Tips Artist Masking Fluid 284075001 White

DANIEL SMITH$12.484.2★1,834 rev

Sinbana 2pcs Masking Fluid Pen for Watercolor Painting Masking Fluid Pens with 14cm/3mm & 13.5cm/0.7mm Applicator Tip with 2 Erasers Blue Liquid Marker for Various Art Projects Watercolor Ink

Sinbana$10.074.0★12 rev

Molotow GRAFX Masking Fluid Pump Marker 2mm 1 Each (728.001)

MOLOTOW$8.983.3★1,697 rev

Newest

by launch date

VHOUHOU 3 PCS Masking Fluid Pen for Watercolor Painting with 2 Erasers 1 Blue and 2 Green Watercolor Masking Fluid Pen with 0.7mm Applicator Tip for Various Art Projects

VHOUHOU$14.930 rev

3mo ago

2 Pcs Green Masking Fluid Pens for Watercolor Painting 0.7mm 3.0mm Applicator Tip Markers Set with 2 Cleaning Erasers Art Masking Fluid Pen Watercolor Medium Art Supplies for Artists (Green 3mm)

FOCIRCLEA$14.598 rev

3mo ago

Sinbana 2pcs Masking Fluid Pen for Watercolor Painting Masking Fluid Pens with 14cm/3mm & 13.5cm/0.7mm Applicator Tip with 2 Erasers Blue Liquid Marker for Various Art Projects Watercolor Ink

Sinbana$10.0712 rev

5mo ago

Jinxuhaus Masking Fluid Marker Set for Watercolor Dual Size Pack (0.7mm Fine & 3.0mm Broad Tips) Liquid Frisket Pen with Residue Eraser Preserve White Highlights for Ink & Gouache

Jinxuhaus$16.1518 rev

6mo ago

Feifeiya 3 Pcs 2 Blue Masking Fluid Pen for Watercolor Painting with 1 Cleaning Eraser 0.7mm and 3.0mm Masking Fluid Marker Applicator Tip for Watercolor Ink Various Art Projects Gouache Painting

Feifeiya$13.6332 rev

7mo ago

What buyers say about masking fluid pen

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

What buyers love

Ease Of Use19%

“Easy to use”

Quality-Overall10%

“Good quality and Easy to use”

Efficiency10%

“Masking Fluid works great”

Color8%

“Blue color is good”

Advertised Vs Actual Product7%

“As advertised”

Paint Quality7%

“Great for masking off parts of painting”

Size-Overall4%

“Perfect size”

Ease Of Cleaning3%

“clean up afterwards”

Value For Money3%

“The price is fair”

Design-Overall3%

“This has absolutely added a new layer to my art”

What buyers complain about

Moist/Dry14%

“Dried out”

Ease Of Use11%

“Hard to remove”

Functionality-Overall10%

“Didnt work well”

Quality-Overall5%

“being cheap is NEVER the right answer”

Spray/Flow5%

“Poor flow to apply”

Color5%

“turns it yellow”

Value For Money4%

“Waste of money”

Thickness4%

“Arrived thick and unusable”

Leak-Proof4%

“second bottle leaked”

Paint Quality3%

“ruining both paintings”

Top return reasons

Moist/Dry17%

Functionality-Overall15%

Color13%

Leak-Proof7%

Advertised Vs Actual Product6%

Material Quality3%

Color Fading/Discoloration3%

Ease Of Use3%

Mechanism Issues3%

Dispensing Mechanism2%

Common questions

Is masking fluid pen profitable to sell on Amazon United States?: The niche generates $47K/yr across 23 tracked products. 2 of 10 products launched in the last 360 days are still selling. 90-day search growth is +1.5%. Flapen's verdict: Worth a look (56/100).
How competitive is the masking fluid pen niche?: 16 brands and 55 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 67% of demand.
What do buyers complain about in masking fluid pen?: Top complaints mined from reviews: Moist/Dry, Ease Of Use, Functionality-Overall. The return rate is 0.7%.
When does demand for masking fluid pen peak?: Demand peaks in Oct–Nov–Dec; the busiest month runs 3.0× the quietest.
What does it cost to enter the masking fluid pen niche?: Listings span $6.44–$29.03; the average listing price is $13.21 (sweet spot $15–$100). The average incumbent carries 724 reviews — the moat a new listing must climb.