Fiberglass Repair Kit Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Fiberglass Repair Kit sales on Amazon US totaled 47,400 units in July 2026 (▼ 4.8% vs. the prior month), generating an estimated $850,449 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 63.3% of unit volume and 48.6% of revenue, while a typical listing is priced at $23.82. The keyword itself pulled 26,344 Amazon queries over the same period (▼ 6.1% MoM).
Zooming out to the 12-month window ending July 2026, the fiberglass repair kit Top 50 moved 430,350 units and $7,889,235 in cumulative sales — an average of 35,863 units and $657,436 per month. Monthly throughput topped out at 49,800 units in June 2026 and dipped to 26,350 in December 2025, leaving the latest reading 18.1% higher than August 2025.
Fiberglass Repair Kit 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
47.4K
▼ 4.8% MoM
Monthly Revenue 2026/07
$850.4K
▼ 5.5% MoM
Top 10 Market Share 2026/07
63.3%
Fiberglass Repair Kit Market Share & Sales Concentration on Amazon US — July 2026
The most-sold fiberglass repair kit listing on Amazon US in July 2026 is ASIN B000BRQ0TW (Brand: J-B Weld), which sold 10,000 units at $6.17 apiece — equal to 21.1% of every unit tracked in this report and 2.0× the volume of the No. 2 listing.
The Top 10 ASINs account for 30,000 units and $413,690 in July 2026 — 63.3% of unit volume and 48.6% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Fiberglass Repair Kit' on Amazon
July 2026
Is 63.3% Top 10 share highly concentrated?
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Top 5 Volume Share breakdown
B000BRQ0TW
J-B Weld 8277 WaterWeld Epoxy Putty Stick - 2 oz.
10K
▲ 0.0%vs. prior month
$61.7K
latest month
12-month trend
B0CRTNP23M
Tub Repair Kit White, Bathtub Repair Kit for Enamel, Fiberglass, Acrylic | For Chips, Cracks, Scratches, Holes & Rust on Porcelain, Patch & Repairs Cast Iron Tubs, Toilet, Sink, Shower Pan in Bathroom
5K
▲ 0.0%vs. prior month
$97.6K
latest month
12-month trend
B00R2CDVIW
J-B Weld 50172 25 ml. MarineWeld Syringe
4K
▲ 0.0%vs. prior month
$23.1K
latest month
12-month trend
B091T368MK
ATOLS Upgraded Plastic Welder, 1000PCS Staples, Pure Copper Transformer, Rapid Heating, Plastic Welding Kit, Hot Stapler Kit, Plastic Welder Gun Kit, Car Bumper Repair Kit, Plastic Repair Kit(Red)
3K
▼ 25.0%vs. prior month
$63.1K
latest month
12-month trend
B0B4RDHKDR
Upgraded 220W Plastic Welder, 2 in 1 Plastic Welding Kit Plastic Repair Welder Kit 1000PCS Hot Stapler Soldering Gun with 100PCS Plastic Welding Rods Car Bumper Repair Kit for Most Plastic Repair
2K
▲ 0.0%vs. prior month
$69.3K
latest month
12-month trend
B0F9NSK46X
Globalcom Fiberglass Boat Repair Kit White, Gel Coat Repair Kit for Boats | Marine Fiberglass Repair Kit for Boats, Epoxy Filler for Boats, Fiberglass Repair Kit Fix Holes Chips Pit Cracks
2K
▲ 0.0%vs. prior month
$34K
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Best Fiberglass Repair Kit Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
J-B Weld is the best-performing fiberglass repair kit brand in July 2026, moving 14,000 units across 2 ASINs for 46.7% of Top 10 volume. Ankita follows with 6,000 units (20.0%), ahead of ATOLS on 3,000 units (10.0%).
With 7 brands splitting the Top 10 and 76.7% 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 $5.97 to $19.99, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
J-B Weld
2 ASINs in Top 10
46.7%
Units
14K
Revenue
$84.8K
Avg. price
$5.97
B000BRQ0TW
$6.17·★4.2·13.9K revsJ-B Weld 8277 WaterWeld Epoxy Putty Stick - 2 oz.
Units sold10KB00R2CDVIW
$5.77·★4.6·3.2K revsJ-B Weld 50172 25 ml. MarineWeld Syringe
Units sold4K
Ankita
2 ASINs in Top 10
20.0%
Units
6K
Revenue
$114.6K
Avg. price
$18.45
B0CRTNP23M
$17.91·★4.3·1.7K revsTub Repair Kit White, Bathtub Repair Kit for Enamel, Fiberglass, Acrylic | For Chips, Cracks, Scratches, Holes & Rust on Porcelain, Patch & Repairs Cast Iron Tubs, Toilet, Sink, Shower Pan in Bathroom
Units sold5KB0CRTMJXX1
$18.98·★4.3·345 revsFiberglass Tub Repair Kit (Color Match), for Shower Crack & Bathtub Chip | For Porcelain Enameled Cast Iron Steel Tub Holes & Rust, Ceramic Tile, Acrylic Tub Surround & Shower Pan, Almond, Beige, Bone
Units sold1K
ATOLS
1 ASIN in Top 10
10.0%
Units
3K
Revenue
$63.1K
Avg. price
$19.99
B091T368MK
$19.99·★4.6·3.8K revsATOLS Upgraded Plastic Welder, 1000PCS Staples, Pure Copper Transformer, Rapid Heating, Plastic Welding Kit, Hot Stapler Kit, Plastic Welder Gun Kit, Car Bumper Repair Kit, Plastic Repair Kit(Red)
Units sold3K
Trending Fiberglass Repair Kit 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. Specifically, one ASIN forced its way in: B0CRTMJXX1 booked 1K units at $18.98, with ▲ 100.0% MoM change. On the growth side, B0C7CZ2644 leads positive momentum with ▲ 50.0% MoM growth on 300 units, with B0DYPDXLK1 close behind at ▲ 33.3% MoM on 400 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.
B0CRTMJXX1
Fiberglass Tub Repair Kit (Color Match), for Shower Crack & Bathtub Chip | For Porcelain Enameled Cast Iron Steel Tub Holes & Rust, Ceramic Tile, Acrylic Tub Surround & Shower Pan, Almond, Beige, Bone
Price
$18.98
Rating
4.3
Reviews
345
Latest month sales
B0C7CZ2644
Polymer World- Premium Grade Polyester Resin 1-10 Gallon Kit with MEKP for Boats, Cars, Surfboard, RV, Pools,Canoes, Jetskis, Watercrafts (1, 1 Gallon)
Price
$43.39
Rating
4.7
Reviews
359
Latest month sales
B0DYPDXLK1
Evercoat Body Shop 105007 Pro-Grade Fiberglass Resin for Repairing and Rebuilding Panels & Holes in Fiberglass, Metal, Wood & More, Easy Mix Hardener Included 32 Fl Oz.
Unlock to view ASIN details and product titles
Price
$19.71
Rating
4.8
Reviews
189
Latest month sales
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