prosoco
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Avg price
Great$83.99avg listing price — sweet spot $15–$100
Review moat
Good624avg incumbent reviews — the moat a new listing must climb
Returns
Good2.3%return rate — above 5% kills the launch gate
Growth
Good+28.9%90-day search growth — must beat 0% to launch
Conversion
Good4.2%search→purchase rate — share of searches ending in a sale
Price range
Okay$30.63–$299.58cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Market size
Bad$73K$73K/yr · 21K searches
Competition
Bad88%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, prosoco is a $73K/yr Amazon United States market (21K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 36/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
prosoco market data
- Units sold / yr
- 3K–3K
- avg 100–250/product
- Revenue / yr
- $210K–$252K
- units × avg price
- Conversion rate
- 4.2%
- Avg BSR
- #144
- Page quality
- 0%
- Prime
- 67%
- Sponsored
- 89%
- Out of stock
- 5.3%
- Avg brand age
- 94 months
- Avg seller age
- 167 days
Competition & brand share
The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.Brands
4 falling
Sellers
15
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
88%
Top 20: 100%
Open market
0%
- ZIP System59%
- Prosoco26%
- POLYGUARD12%
- Liquid Rubber4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +28.9% search growth over the last 90 days.Peak months: Sep, Oct · busiest ÷ quietest = 2.1×
Top prosoco search terms
- liquid flashing13K/yr
- zip liquid flashing5K/yr
- liquid flash3K/yr
Top prosoco 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.
All 9 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
ZIP System Liquid Flashing - Fluid-Applied Sealant with STP Polymer - Professional-Grade - Weather Protection - Exterior Seal for Hard-to-Flash Surfaces - 10.3 oz Cartridge
ZIP System$30.634.3★289 rev
PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals (4)
Prosoco$114.514.6★28 rev
Blue Barrier Liquid Flashing 2-Pack 20oz Sausage Tubes Weather-Resistant Air Barrier for Window and Door Installations Low VOC Made in The USA
POLYGUARD$50.854.6★32 rev
PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals
Prosoco$41.414.8★255 rev
ZIP System Liquid Flash Sausage Applicator - Professional-Grade Aluminum Barrel Caulk Gun - 18:1 Thrust Ratio - Rotating Barrel Applicator - 20 oz Sausage
ZIP System$64.434.7★76 rev
Newest
by launch datePROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals (4)
Prosoco$114.5128 rev
Blue Barrier Liquid Flashing 2-Pack 20oz Sausage Tubes Weather-Resistant Air Barrier for Window and Door Installations Low VOC Made in The USA
POLYGUARD$50.8532 rev
Prosoco Roller Grade FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals (2 GAL)
Prosoco$299.586 rev
ZIP System Liquid Flash Sausage Applicator - Professional-Grade Aluminum Barrel Caulk Gun - 18:1 Thrust Ratio - Rotating Barrel Applicator - 20 oz Sausage
ZIP System$64.4376 rev
ZIP System Liquid Flashing - Fluid-Applied Sealant with STP Polymer - Professional-Grade - Weather Protection - Exterior Seal for Hard-to-Flash Surfaces - 10.3 oz Cartridge
ZIP System$30.63289 rev
Trending
90-day click momentumZIP System Liquid Flashing - Fluid-Applied Sealant with STP Polymer - Professional-Grade - Weather Protection - Exterior Seal for Hard-to-Flash Surfaces - 10.3 oz Cartridge
ZIP System$30.634.3★
PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals
Prosoco$41.414.8★
Blue Barrier Liquid Flashing 2-Pack 20oz Sausage Tubes Weather-Resistant Air Barrier for Window and Door Installations Low VOC Made in The USA
POLYGUARD$50.854.6★
ZIP System Liquid Flash Sausage Applicator - Professional-Grade Aluminum Barrel Caulk Gun - 18:1 Thrust Ratio - Rotating Barrel Applicator - 20 oz Sausage
ZIP System$64.434.7★
PROSOCO FastFlash | Waterproof and Airtight Fluid-Applied Flashing Membrane - Trusted by Professionals (4)
Prosoco$114.514.6★
What buyers say about prosoco
What buyers praise and complain about, mined from review topics.What buyers love
“Good product and cheap”
“As advertised”
“It's well worth the money”
“Great waterproofing, used to seal new home”
“has adhered well to my project”
“Fixing leaks”
“Works great”
“Durability”
“this stuff is 100% seal”
“easier to work with than some other brands”
What buyers complain about
“that I bought 26 yrs ago after it began leaking last year pretty badly from cracks”
“It did not stick or dry”
“Quality is poor”
“cost. Little expensive”
“It did not stick or dry...came out cream grey colors instead of black.”
“Didnt last more than 2 weeks”
“Weak product”
“Wear gloves or have a can of acetone to clean up your tools it can get a little messy”
“The first batch I got seemed thicker”
“It has a smell”
Top return reasons
Common questions
- Is prosoco profitable to sell on Amazon United States?
- The niche generates $73K/yr across 9 tracked products. 90-day search growth is +28.9%. Flapen's verdict: Skip it (36/100).
- How competitive is the prosoco niche?
- 4 brands and 15 sellers compete. The top 5 products take 88% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in prosoco?
- Top complaints mined from reviews: Leak-Proof, Adhesion/Stickiness, Quality-Overall. The return rate is 2.3%.
- When does demand for prosoco peak?
- Demand peaks in Sep–Oct; the busiest month runs 2.1× the quietest.
- What does it cost to enter the prosoco niche?
- Listings span $30.63–$299.58; the average listing price is $83.99 (sweet spot $15–$100). The average incumbent carries 624 reviews — the moat a new listing must climb.