Is waterproof patch and sealant profitable to sell on Amazon United States?

The niche generates $182K/yr across 14 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -39.5%. Flapen's verdict: Skip it (46/100).

How competitive is the waterproof patch and sealant niche?

10 brands and 35 sellers compete. The top 5 products take 77% of clicks and top 5 brands hold 90% of demand.

What do buyers complain about in waterproof patch and sealant?

Top complaints mined from reviews: Leak-Proof, Size-Overall, Water Resistance. The return rate is 1.3%.

What does it cost to enter the waterproof patch and sealant niche?

Listings span $13.76–$36.02; the average listing price is $24.59 (sweet spot $15–$100). The average incumbent carries 911 reviews — the moat a new listing must climb.

waterproof patch and sealant

Skip it

Soft demand (-39.5% this quarter) — this niche doesn't clear our bar today.

Avg price

Incredible$24.59

avg listing price — sweet spot $15–$100

Price range

Great$13.76–$36.02

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

Returns

Great1.3%

return rate — above 5% kills the launch gate

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Review moat

Good910.57

avg incumbent reviews — the moat a new listing must climb

Conversion

Good4.0%

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

Market size

Okay$182K

$182K/yr · 183K searches

Brand share

Okay90%

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

Competition

Bad77%

top-5 click share — a locked-up shelf

Growth

Bad-39.5%

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

According to Flapen's Amazon United States niche tracking, waterproof patch and sealant is a $182K/yr Amazon United States market (183K searches/yr). The top 5 brands hold 90% of demand. Verdict: Skip it — 46/100.

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

waterproof patch and sealant market data

Units sold / yr: 5K–6K; avg 250–500/product
Revenue / yr: $123K–$148K; units × avg price
Conversion rate: 4.0%
Avg BSR: #84
Page quality: 0%
Prime: 100%
Sponsored: 57%
Out of stock: 0.0%
Avg brand age: 45 months
Avg seller age: 160 days

Competition & brand share

The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.

Brands

10 falling

Sellers

Top-5 brand share

90%

Top 20: 100%

Top-5 click share

77%

Top 20: 100%

Open market

Tufinein56%
Archi Republic18%
Xmntdo6%
OCEA CBONE5%
XFCA4%
SCNK3%
Open — no brand owns it (4 brands, 8%)

Demand

Weekly Amazon search volume, last 25 weeks — -39.5% search growth over the last 90 days.

Open Trend

Top waterproof patch and sealant search terms

archi republic waterproof sealant10K/yr +20.2%2.2% conv.
waterproof patch and sealant21K/yr -20.3%2.6% conv.
osea cbone waterproof sealant17K/yr -41.8%1.8% conv.
invisible waterproof sealant12K/yr -46.6%2.9% conv.
transparent waterproof sealant9K/yr +29.8%2.5% conv.
transparent waterproof adhesive17K/yr -47.6%3.7% conv.
ocea cebone waterproof sealant9K/yr -50.2%1.7% conv.
ocea bone waterproof sealant7K/yr -43.9%1.2% conv.
archi waterproof sealant2K/yr -6.3%1.4% conv.
transparent waterproof coating15K/yr -58.1%4.1% conv.

All search terms

Top waterproof patch and 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★)

All 14 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Waterproof Sealant 70oz Clear TUFINEIN Transparent Waterproof Coating Water-Based Invisible Agent Roofs Walls Garden Terraces Indoor & Outdoor

Tufinein$33.054.3★1,606 rev

Transparent Waterproof Coating TUFINEIN 35oz Invisible Waterproof Agent Indoor & Outdoor Sealant Water-Based Clear Sealant Roofs Walls Garden Terraces

Tufinein$24.144.4★2,287 rev

Upgraded Invisible Waterproof Agent Clear as Crystal Transparent Waterproof Paint for Both Interior and Exterior Use on Rooftops Bathrooms and Walls for Leak Prevention and Tight Seal. (70OZ)

Archi Republic$36.023.6★38 rev

Upgraded Invisible Waterproof Agent Clear as Crystal Transparent Waterproof Paint for Both Interior and Exterior Use on Rooftops Bathrooms and Walls for Leak Prevention and Tight Seal. (35OZ)

Archi Republic$25.093.8★50 rev

Xmntdo Invisible Waterproof Agent Transparent Repairing Leak Waterproof Adhesive for Roofs Walls Bathroom Shower Window Sills Indoor & Outdoor Water Proof Coating 35 Oz

Xmntdo$22.734.4★3,252 rev

Newest

by launch date

SCNK 1000g Transparent Waterproof Coating Agent Indoor and Outdoor Sealant

SCNK$22.96895 rev

9mo ago

Invisible Waterproof Agent 35oz | Transparent Sealant for Bathroom Shower Concrete & Roof Indoor/Outdoor Use

PIBEIBUK$25.22120 rev

10mo ago

Hupeyna Liquid Waterproof Sealant Invisible Water Proof Agent Anti-Leakage Repairing Transparent Waterproof Coating Indoor and Outdoor Water-Based Waterproofing Glue 1L

Hupeyna$24.33348 rev

10mo ago

Transparent Waterproof Sealant 35 oz Clear Transparent Waterproof Coating Liquid Invisible Water Proof Agent for Roofs Walls Garden Bathroom Kitchen Indoor & Outdoor Water Proof Sealant

XFCA$22.451,206 rev

1y ago

YKF Transparent Waterproof Sealant 12 Oz Clear Water-Based Leak Repair Coating for Roof Wall Bathroom Shower Kitchen Concrete Wood Metal Indoor & Outdoor

YKF$13.76558 rev

1y ago

What buyers say about waterproof patch and sealant

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

What buyers love

Leak-Proof19%

“It hasnt leaked yet”

Quality-Overall11%

“Excellent Product”

Water Resistance11%

“Water proof”

Ease Of Use11%

“Easy to use”

Advertised Vs Actual Product8%

“Just as advertised”

Efficiency8%

“Works Perfectly”

Value For Money4%

“Great value”

Durability4%

“Its clearly versatile and durable, which makes it great value for the size”

Adhesion/Stickiness2%

“The sealant dries clear and non-sticky and is very easy to apply”

Smell2%

“The odor is not bad”

What buyers complain about

Leak-Proof11%

“I have a small leak”

Size-Overall11%

“Smaller than expected”

Water Resistance10%

“Water would sneak in along that seam whenever it rained, nothing major”

Color9%

“blonde with gray”

Durability8%

“Lasted one trip”

Quality-Overall7%

“Terrible performance”

Advertised Vs Actual Product5%

“The picture of product is deceiving”

Functionality-Overall5%

“Didn't work”

Value For Money4%

“Wish it was a little cheaper”

Thickness3%

“Dont put it on too thick as it will crumble”

Top return reasons

Advertised Vs Actual Product23%

Functionality-Overall15%

Size-Overall10%

Leak-Proof7%

Value For Money5%

Water Resistance5%

Adhesion/Stickiness5%

Defective Material/Parts3%