Flex Seal
PassFlex Seal scores 73 out of 100, a Pass. Shoppers spend an estimated $2.6M a year here, search demand grew +71.6% this quarter, and an estimated 0.3% of orders come back.
- Flapen Score
- 73 / 100Top 1% of 9,536 Tools & Home Improvement niches · +25 vs the category median of 4873
- Market size
- $2.6M/yr1.4M searches / yr
- 90-day growth
- +71.6%search demand this quarter
- Competition
- 41%top-5 click share · 7 brands · 151 sellers
Flapen Score
Flex Seal against its category
The dotted line is the Tools & Home Improvement average. Past it, Flex Seal is stronger. Inside it, weaker.
Market
The Flex Seal market on Amazon at a glance
Shoppers on Amazon United States searched for Flex Seal 1.4M times last year and spent an estimated $2.6M. The top 5 brands take 98% of clicks. Demand peaks in Apr–Jun–Jul. Flapen scores it 73 out of 100, a Pass.
01 · Demand
An estimated 8.6% of those searches ended in a purchase.
Shoppers searched for this 1.4M times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 8.6% of those searches ended in a purchase. Searches in the last 90 days moved +71.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated $2.6M a year.
- Searches, last 12 months
- 1.4M
- Growth, 90 days vs prior 90
- +71.6%
- Conversion, latest week
- 8.6%
- Market size, estimated
- $2.6Ma year
- Peak month
- April4.3× the quietest month
- Top search term
- flex seal815K searches a year
02 · Price
A sale here is worth $21.37.
Listings sell for $21.37 on average, from $6.37 to $78.76. Amazon reports units sold in ranges. This niche sold 100K to 125K a year. The average listing sells 3,000 to 4,000 of them. At $21.37 that is $64K to $85K a year per listing.
- Average price
- $21.37inside the $15 to $100 sweet spot
- Price range
- $6.37–$78.76
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 100K–125K
- Units per listing a year
- 3,000–4,000
- Revenue per listing a year
- $64K–$85K
- Returns
- 0.3%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
81% of listings pay for placement with sponsored ads. 95% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #49 within Adhesives & Sealers. It carries 14,618 reviews at 4.33 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 81%
- Prime listings
- 95%
- Out of stock, average day
- 0.0%
- Average rank
- #49in Adhesives & Sealers
- Average rating
- 4.33 starsAmazon United States average 4.42 stars
- Average reviews
- 14,618per listing
- Listings tracked
- 37
04 · Newcomers
2 of last year's 3 launches cleared the first-year sales bar.
3 products launched here in the last 12 months. 2 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 55 months on average, so the names here are settling in.
- Launched, last 12 months
- 3
- Successful launches
- 2Amazon's first-year sales bar
- Average brand age
- 55 months
Products
Top Flex Seal products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 27, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Flex Seal 14 oz Clear Stop Leaks Instantly Transparent Waterproof Rubber Spray On Sealant Coating Perfect for Gutters Wood RV Campers Roof Repair Skylights Windows and More
- Price
- $14.34
- Rating
- 4.4/5
- Reviews
- 39,391
- Age
- 12y ago

Flex Seal MAX 17 oz 2-Pack Clear Stop Leaks Instantly Waterproof Rubber Spray On Sealant Coating Perfect for Gutters Wood RV Campers Roof Repair Skylights Windows and More
- Price
- $32.42
- Rating
- 4.4/5
- Reviews
- 39,391
- Age
- 3y ago

Flex Seal Liquid Rubber Coating Sealant Waterproof Flexible Breathable and UV Resistant Roof Repair Basements RV Campers Trailers Marine EPDM Masonry Clear 16 oz
- Price
- $19.45
- Rating
- 4.5/5
- Reviews
- 3,022
- Age
- 10y ago

Flex Seal 14 oz White Stop Leaks Instantly Waterproof Rubber Spray On Sealant Coating Perfect for Gutters Wood RV Campers Roof Repair Skylights Windows and More
- Price
- $14.37
- Rating
- 4.4/5
- Reviews
- 39,391
- Age
- 11y ago

Flex Seal 14 oz Black Stop Leaks Instantly Waterproof Rubber Spray On Sealant Coating Perfect for Gutters Wood RV Campers Roof Repair Skylights Windows and More
- Price
- $14.34
- Rating
- 4.4/5
- Reviews
- 39,391
- Age
- 15y ago
Trending
estimated 90-day click momentum
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
- Price
- $14.76
- Rating
- 4.1/5
- Reviews
- 161
- Age
- 2mo ago

Flex Caulk Silicone Waterproof & Weatherproof Sealant Strong Indoor Outdoor Bath Kitchen Shower Sink Window Baseboards Door RV Roof Wood Glass Tile Marine White 6.5 oz 1-Pack
- Price
- $16.84
- Rating
- 4.5/5
- Reviews
- 268
- Age
- 1y ago

Flex Seal Mini Black Stop Leaks Instantly Waterproof Rubber Spray On Sealant Coating Travel Size Perfect for Gutters Wood RV Campers Roof Repair Skylights Windows and More
- Price
- $6.37
- Rating
- 4.1/5
- Reviews
- 288
- Age
- 7y ago

Flex Seal Liquid Rubber Coating Sealant Waterproof Flexible Breathable and UV Resistant Roof Repair Basements RV Campers Trailers Marine EPDM Masonry White 32 oz
- Price
- $34.36
- Rating
- 4.5/5
- Reviews
- 138
- Age
- 10y ago

Flex Seal 14 oz White Stop Leaks Instantly Waterproof Rubber Spray On Sealant Coating Perfect for Gutters Wood RV Campers Roof Repair Skylights Windows and More
- Price
- $14.37
- Rating
- 4.4/5
- Reviews
- 39,391
- Age
- 11y ago
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
- Price
- $14.76
- Rating
- 4.1/5
- Reviews
- 161
- Age
- 2mo ago

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
- Price
- $9.60
- Rating
- 4.5/5
- Reviews
- 161
- Age
- 9mo ago

Flex Caulk Silicone Waterproof & Weatherproof Sealant Strong Indoor Outdoor Bath Kitchen Shower Sink Window Baseboards Door RV Roof Wood Glass Tile Marine White 6.5 oz 1-Pack
- Price
- $16.84
- Rating
- 4.5/5
- Reviews
- 268
- Age
- 1y ago

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
- Price
- $14.73
- Rating
- 4.4/5
- Reviews
- 663
- Age
- 1y ago

Flex Caulk Waterproof & Weatherproof Hybrid Polymer Sealant Strong Paintable Indoor Outdoor Bath Shower Sink Window Baseboards Door RV Roof Wood Auto & Marine Clear 6.6 oz 1-Pack
- Price
- $19.51
- Rating
- 4.5/5
- Reviews
- 1,943
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 41% of clicks. Leaders hold, but buyers still shop past them.
Brands
7 falling
Sellers
151
Est. top-5 brand share
98%
Top 20: 100%
Est. top-5 click share
41%
Top 20: 85%
Open market
1%
- Flex Seal68%
- Flex Seal Liquid18%
- Flex Tape6%
- Flex Paste4%
- GORILLA2%
- Leak Stopper1%
- Open — no brand owns it (1 brand, 1%)
Demand
Flex Seal search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Apr, Jun, Jul · busiest ÷ quietest = 4.3×
Search terms
Top Flex Seal search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- flex seal815K/yr
- flex seal spray298K/yr
- flexseal37K/yr
- flex seal clear35K/yr
- flex. seal21K/yr
- flexseal spray23K/yr
- flex seal spray rubberized coating8K/yr
- flex-seal23K/yr
- flex seal white17K/yr
- flex seal spray clear16K/yr
Reviews and returns
What reviews say buyers love and hate about Flex Seal
We read the reviews and the return reasons for every product selling here.
“This does not work as expected”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
15 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Flex Seal questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









