flex paste
Worth a lookShows demand growing +274.7% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Growth
Incredible+274.7%90-day search growth — must beat 0% to launch
Returns
Incredible0.8%return rate — above 5% kills the launch gate
Conversion
Great9.8%search→purchase rate — share of searches ending in a sale
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Avg price
Great$15.72avg listing price — sweet spot $15–$100
Price range
Good$6.30–$35.05cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good$302K$302K/yr · 197K searches
Review moat
Okay2,460.2avg incumbent reviews — the moat a new listing must climb
Competition
Bad73%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, flex paste is a $302K/yr Amazon United States market (197K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jun–Jul. Verdict: Worth a look — 62/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
flex paste market data
- Units sold / yr
- 15K–20K
- avg 1,250–1,500/product
- Revenue / yr
- $236K–$314K
- units × avg price
- Conversion rate
- 9.8%
- Avg BSR
- #25
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 67%
- Out of stock
- 9.2%
- Avg brand age
- 53 months
- Avg seller age
- 146 days
Competition & brand share
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.Brands
3 falling
Sellers
71
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
73%
Top 20: 100%
Open market
0%
- Flex Seal62%
- Flex Paste36%
- J-B Weld1%
Demand & seasonality
Weekly Amazon search volume, last 71 weeks — +274.7% search growth over the last 90 days.Peak months: Jun, Jul · busiest ÷ quietest = 4.0×
Top flex paste search terms
- flex seal power putty31K/yr
- flex seal putty26K/yr
- flex paste41K/yr
- power putty flex seal8K/yr
- flex seal paste19K/yr
- flex putty6K/yr
- flex seal putty waterproof5K/yr
- flexseal power putty4K/yr
- flex paste white12K/yr
- waterproof putty10K/yr
Top flex paste 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 15 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Flex Paste Waterproof Paintable Putty Spackle Sealant Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls Drywall EPDM Concrete Roof RV Repairs Clear Half-Quart
Flex Paste$14.734.4★663 rev
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 White 16 oz
Flex Seal$14.824.1★161 rev
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$14.764.1★161 rev
Flex Seal Epoxy Ultimate Putty Multi-Purpose Durable Permanent Watertight Long-Lasting Bond for Automotive Marine Plumbing Home & Tool Repairs Cures Dark Gray 2 oz Putty Stick
Flex Seal$9.604.5★161 rev
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 8 oz
Flex Seal$9.964.1★161 rev
Newest
by launch dateFlex Seal Power Putty Moldable Waterproof Rubberized Sealant Instantly Fills Gaps Cracks or Holes Removable Reusable Works Underwater Pipes Marine Auto RV Metal Plastic Wood White 16 oz
Flex Seal$14.82161 rev
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
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 8 oz
Flex Seal$9.96161 rev
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 Black 16 oz
Flex Seal$15.10161 rev
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 Black 8 oz
Flex Seal$9.98161 rev
Trending
90-day click momentumFlex Seal Power Putty Moldable Waterproof Rubberized Sealant Instantly Fills Gaps Cracks or Holes Removable Reusable Works Underwater Pipes Marine Auto RV Metal Plastic Wood Black 16 oz
Flex Seal$15.104.1★
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 Black 8 oz
Flex Seal$9.984.1★
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$14.764.1★
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 White 16 oz
Flex Seal$14.824.1★
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 8 oz
Flex Seal$9.964.1★
What buyers say about flex paste
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to use”
“It worked pretty well”
“As advertised”
“It has not leaked”
“Works very well”
“Good deal”
“Waterproof and helps seal out moisture”
“Sticks well”
“It worked ok for simple repairs”
“Very durable”
What buyers complain about
“Leak”
“Did not work”
“This stuff does not work as an adhesive”
“Impossible to use”
“lousy quality control”
“Overpriced and slow”
“Or just false advertising”
“hard as a rock”
“I genuinely cant think of a use-case where Id need a waterproof seal”
“Turns yellow after a while :”
Top return reasons
Common questions
- Is flex paste profitable to sell on Amazon United States?
- The niche generates $302K/yr across 15 tracked products. 7 of 7 products launched in the last 360 days are still selling. 90-day search growth is +274.7%. Flapen's verdict: Worth a look (62/100).
- How competitive is the flex paste niche?
- 3 brands and 71 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in flex paste?
- Top complaints mined from reviews: Leak-Proof, Functionality-Overall, Adhesion/Stickiness. The return rate is 0.8%.
- When does demand for flex paste peak?
- Demand peaks in Jun–Jul; the busiest month runs 4.0× the quietest.
- What does it cost to enter the flex paste niche?
- Listings span $6.30–$35.05; the average listing price is $15.72 (sweet spot $15–$100). The average incumbent carries 2,460 reviews — the moat a new listing must climb.