Is duct sealant profitable to sell on Amazon United States?

The niche generates $148K/yr across 21 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +53.6%. Flapen's verdict: Worth a look (57/100).

How competitive is the duct sealant niche?

15 brands and 70 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 85% of demand.

What do buyers complain about in duct sealant?

Top complaints mined from reviews: Leak-Proof, Functionality-Overall, Adhesion/Stickiness. The return rate is 1.1%.

When does demand for duct sealant peak?

Demand peaks in Jun–Jul–Aug; the busiest month runs 2.2× the quietest.

What does it cost to enter the duct sealant niche?

Listings span $5.00–$68.46; the average listing price is $21.80 (sweet spot $15–$100). The average incumbent carries 1,712 reviews — the moat a new listing must climb.

duct sealant

Worth a look

Shows low returns (1.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Great1.1%

return rate — above 5% kills the launch gate

Avg price

Great$21.80

avg listing price — sweet spot $15–$100

Price range

Great$5.00–$68.46

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

Conversion

Good6.9%

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

Growth

Good+53.6%

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

Review moat

Okay1,712.1

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Okay63%

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

Brand share

Okay85%

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

Market size

Okay$148K

$148K/yr · 98K searches

According to Flapen's Amazon United States niche tracking, duct sealant is a $148K/yr Amazon United States market (98K searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Jun–Jul–Aug. Verdict: Worth a look — 57/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

duct sealant market data

Units sold / yr: 6K–8K; avg 250–500/product
Revenue / yr: $131K–$174K; units × avg price
Conversion rate: 6.9%
Avg BSR: #152
Page quality: 0%
Prime: 100%
Sponsored: 81%
Out of stock: 0.0%
Avg brand age: 58 months
Avg seller age: 156 days

Competition & brand share

The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 rising

Sellers

Top-5 brand share

85%

Top 20: 100%

Top-5 click share

63%

Top 20: 99%

Open market

13%

Red Devil65%
Rectorseal8%
Henry7%
KEPTFIT3%
Carlisle Paddles2%
J-B Weld2%
Open — no brand owns it (9 brands, 13%)

Demand & seasonality

Weekly Amazon search volume, last 103 weeks — +53.6% search growth over the last 90 days.

Peak months: Jun, Jul, Aug · busiest ÷ quietest = 2.2×

Open Trend

Top duct sealant search terms

duct sealant19K/yr +50.6%6.5% conv.
mastic sealant21K/yr +9.4%3.7% conv.
mastic duct sealant11K/yr +104.2%6.1% conv.
duct mastic8K/yr +100.4%7.3% conv.
waterproof putty sealant7K/yr +69.4%5.7% conv.
hvac sealant6K/yr +98.4%6.2% conv.
hvac mastic5K/yr +78.9%6.3% conv.
air duct sealant6K/yr +57.0%6.8% conv.
hvac duct sealant5K/yr +61.1%4.6% conv.
duct mastic sealant4K/yr +50.1%6.3% conv.

All search terms

Top duct sealant 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 21 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Red Devil 0841DW F-Seal 181 Fiber Reinforced Water Based Duct Sealant 1 Gallon White

Red Devil$28.784.5★1,547 rev

Red Devil 0841DX F-Seal 181 Duct Seal Fiber Reinforced Water Based Duct Sealant 1 Gallon Gray Made in USA

Red Devil$24.834.5★1,547 rev

Red Devil 0841DS RD-DS 181 Acrylic Latex Duct Sealant 1/2 Gallon Gray

Red Devil$26.124.6★622 rev

RectorSeal Duct Seal 81880 Compound Easily Applied to Plumbing & Metal Fabrication Paintable General Purpose Sealant 1 lb

Rectorseal$5.004.7★1,842 rev

Henry 314 Premixed Mastic Adhesive 1 QT Ready Set

Henry$12.684.5★384 rev

Newest

by launch date

Flex Seal Power Putty Moldable Waterproof Rubberized Sealant Instantly Fills Gaps Cracks or Holes Removable Reusable Works Underwater Pipes Marine Auto RV Metal Plastic Wood Gray 16 oz

Flex Seal$14.76161 rev

2mo ago

Red Devil 0841EX E-181 Duct Seal Fiber Reinforced Water Based Duct Sealant 1 Gallon Gray Made in USA

Red Devil$32.730 rev

9mo ago

Waterproof Sealant Mastic 6 Pack New Type White Seal Putty Waterproof Duct Seal Repair Sealing Clay Quick Mending Mud for Drain Connection Suitable for Wall Hole Air Conditioning Hole Repair

Generic$9.8750 rev

10mo ago

8 Pack White Seal Putty - Grade Waterproof Duct Sealant Clay Fast Setting Repair Putty for Tight Drain Joints Wall Cavities Air Conditioning Pipe Openings & Air Leak Prevention

ZFYOUNG$10.9583 rev

1y ago

HVAC Guys ThermaTack Aerosol Spray Glue for HVAC Duct Wrap | Duct Insulation Adhesive Spray | Industrial-Grade Fast-Tacking Sealant

HVAC Guys$17.8554 rev

1y ago

What buyers say about duct sealant

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

What buyers love

Quality-Overall15%

“Extremely pleased with results so far”

Ease Of Use15%

“Easy to use”

Advertised Vs Actual Product12%

“As advertised”

Leak-Proof10%

“This fixed my leaks”

Efficiency6%

“Appear to be working”

Value For Money6%

“Good deal”

Durability4%

“Durable and flexible”

Adhesion/Stickiness4%

“Sticks”

Water Resistance3%

“Good for air and water sealing”

Flexibility1%

“The Flex Paste was easy to use”

What buyers complain about

Leak-Proof27%

“Sprayer tank leak”

Functionality-Overall12%

“Not effective at all”

Adhesion/Stickiness10%

“Doesn't stick”

Ease Of Use4%

“Impossible to use”

Quality-Overall4%

“Total trash”

Advertised Vs Actual Product3%

“Or just false advertising”

Value For Money2%

“But its not very cost effective due to the price per pack”

Instructions/User Manual/Troubleshooting2%

“Does not work even after following all the details of the instructions carefully”

Smell2%

“stinks bad”

Thickness2%

“Just takes a little bit very thick sealer”

Top return reasons

Leak-Proof17%

Adhesion/Stickiness16%

Functionality-Overall12%

Advertised Vs Actual Product11%

Value For Money8%

Defective Material/Parts4%

Color4%

Size-Overall4%

Maintenance And Repair3%

Product Condition3%

Common questions

Is duct sealant profitable to sell on Amazon United States?: The niche generates $148K/yr across 21 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +53.6%. Flapen's verdict: Worth a look (57/100).
How competitive is the duct sealant niche?: 15 brands and 70 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 85% of demand.
What do buyers complain about in duct sealant?: Top complaints mined from reviews: Leak-Proof, Functionality-Overall, Adhesion/Stickiness. The return rate is 1.1%.
When does demand for duct sealant peak?: Demand peaks in Jun–Jul–Aug; the busiest month runs 2.2× the quietest.
What does it cost to enter the duct sealant niche?: Listings span $5.00–$68.46; the average listing price is $21.80 (sweet spot $15–$100). The average incumbent carries 1,712 reviews — the moat a new listing must climb.