Flex Seal Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Flex Seal sales on Amazon US totaled 106,100 units in July 2026 (▼ 1.5% vs. the prior month), generating an estimated $1,390,331 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 63.1% of unit volume and 63.9% of revenue, while a typical listing is priced at $14.52. The keyword itself pulled 78,309 Amazon queries over the same period (▲ 3.1% MoM).
Zooming out to the 12-month window ending July 2026, the flex seal Top 50 moved 840,950 units and $11,938,379 in cumulative sales — an average of 70,079 units and $994,865 per month. Monthly throughput topped out at 107,700 units in June 2026 and dipped to 50,200 in May 2026, leaving the latest reading 59.0% higher than August 2025.
Flex Seal Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
106.1K
▼ 1.5% MoM
Monthly Revenue 2026/07
$1.4M
▲ 0.4% MoM
Top 10 Market Share 2026/07
63.1%
Flex Seal Market Share & Sales Concentration on Amazon US — July 2026
The most-sold flex seal listing on Amazon US in July 2026 is ASIN B07B6F5PJ7 (Brand: Flex Tape), which sold 10,000 units at $14.87 apiece — equal to 9.4% of every unit tracked in this report.
The Top 10 ASINs account for 67,000 units and $888,230 in July 2026 — 63.1% of unit volume and 63.9% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Flex Seal' on Amazon
July 2026
Is 63.1% Top 10 share highly concentrated?
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Top 5 Volume Share breakdown
B07B6F5PJ7
Flex Tape, Original Thick Flexible Rubberized Waterproof Tape - Seal and Patch Leaks, Works Underwater, Indoor Outdoor - Home RV Roof Plumbing and Pool Repairs, Clear, 4 in x 5 ft, Pack of 1
10K
▲ 0.0%vs. prior month
$148.7K
latest month
12-month trend
B09VGVRGZD
Goopreen 5 in 1 Caulking Tool Silicone Caulking Grout Removal Sealant Finishing Tool with Stainless Steel Head, 6 Replaceable Pads, Gap Seam Repair Kit for Kitchen Bathroom Sink Toilet Caulking
10K
▲ 42.9%vs. prior month
$139.7K
latest month
12-month trend
B07HSKRYQW
GORILLA Waterproofing Tape, Permanent, Black, 4" x 10', 1-Pack | Weather Resistant Seal for Leaks & Repairs, Air & Moisture Barrier, Bonds Metal, Plastic, Wood, Rubber & Vinyl
10K
▲ 0.0%vs. prior month
$129.7K
latest month
12-month trend
B000BRQ0TW
J-B Weld 8277 WaterWeld Epoxy Putty Stick - 2 oz.
10K
▲ 0.0%vs. prior month
$61.7K
latest month
12-month trend
B00ECGTK4K
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
6K
▲ 100.0%vs. prior month
$89.2K
latest month
12-month trend
B0D2FKV95Q
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
5K
▲ 0.0%vs. prior month
$97.8K
latest month
12-month trend
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Best Flex Seal Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Flex Tape is the best-performing flex seal brand in July 2026, moving 18,000 units across 3 ASINs for 26.9% of Top 10 volume. GORILLA follows with 15,000 units (22.4%), ahead of Flex Seal on 11,000 units (16.4%).
With 6 brands splitting the Top 10 and 65.7% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $13.96 to $17.18, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Flex Tape
3 ASINs in Top 10
26.9%
Units
18K
Revenue
$267.7K
Avg. price
$14.87
B07B6F5PJ7
$14.87·★4.1·20.6K revsFlex Tape, Original Thick Flexible Rubberized Waterproof Tape - Seal and Patch Leaks, Works Underwater, Indoor Outdoor - Home RV Roof Plumbing and Pool Repairs, Clear, 4 in x 5 ft, Pack of 1
Units sold10KB01N5Q3G8H
$14.87·★4.0·8.6K revsFlex Tape Original Thick Flexible Rubberized Waterproof Tape - Seal and Patch Leaks, Works Underwater, Indoor Outdoor - Home RV Roof Plumbing and Pool Repairs, Black, 4 in x 5 ft, Pack of 1
Units sold5KB01N6RNJD6
$14.87·★4.1·20.6K revsFlex Tape Original Thick Flexible Rubberized Waterproof Tape - Seal and Patch Leaks, Works Underwater, Indoor Outdoor - Home RV Roof Plumbing and Pool Repairs, White, 4 in x 5 ft, Pack of 1
Units sold3K
GORILLA
2 ASINs in Top 10
22.4%
Units
15K
Revenue
$204.4K
Avg. price
$13.96
B07HSKRYQW
$12.97·★4.3·30K revsGORILLA Waterproofing Tape, Permanent, Black, 4" x 10', 1-Pack | Weather Resistant Seal for Leaks & Repairs, Air & Moisture Barrier, Bonds Metal, Plastic, Wood, Rubber & Vinyl
Units sold10KB08126M2R4
$14.94·★4.4·20.6K revsGORILLA Waterproofing Tape, Permanent, White, 4" x 10 | Weather Resistant for Leaks and Repairs, Conforms to All Surfaces, UV and Moisture Resistant Backing
Units sold5K
Flex Seal
2 ASINs in Top 10
16.4%
Units
11K
Revenue
$187K
Avg. price
$17.18
B00ECGTK4K
$14.87·★4.4·39.6K revsFlex 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
Units sold6KB0D2FKV95Q
$19.49·★4.4·2K revsFlex 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
Units sold5K
Trending Flex Seal Products — Growth Leaders & New Top 10 Entrants
Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. On the growth side, B0GZX4R67C leads positive momentum with ▲ 233.3% MoM growth on 1K units, with B00ECGTK4K close behind at ▲ 100.0% MoM on 6K units.
The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.
B0GZX4R67C
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
Price
$14.99
Rating
4.0
Reviews
306
Latest month sales
B00ECGTK4K
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
$14.87
Rating
4.4
Reviews
39.6K
Latest month sales
B0F337L4W8
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
Unlock to view ASIN details and product titles
Price
$16.99
Rating
4.5
Reviews
319
Latest month sales
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