Is fiberglass tub repair kit profitable to sell on Amazon United States?

The niche generates $908K/yr across 13 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +2.3%. Flapen's verdict: Launch it (56/100).

How competitive is the fiberglass tub repair kit niche?

10 brands and 13 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 87% of demand.

What do buyers complain about in fiberglass tub repair kit?

Top complaints mined from reviews: Color, Functionality-Overall, Paint Quality. The return rate is 1.7%.

When does demand for fiberglass tub repair kit peak?

Demand is steady year-round — the busiest month runs 1.2× the quietest.

What does it cost to enter the fiberglass tub repair kit niche?

Listings span $9.76–$168.69; the average listing price is $26.08 (sweet spot $15–$100). The average incumbent carries 1,246 reviews — the moat a new listing must climb.

fiberglass tub repair kit

Launch it

A $908K/yr market growing +2.3% this quarter with returns at 1.7% — clears our launch bar.

Avg price

Incredible$26.08

avg listing price — sweet spot $15–$100

Conversion

Great9.0%

search→purchase rate — share of searches ending in a sale

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Returns

Great1.7%

return rate — above 5% kills the launch gate

Market size

Great$908K

$908K/yr · 385K searches

Review moat

Good1,246.46

avg incumbent reviews — the moat a new listing must climb

Price range

Good$9.76–$168.69

cheapest to priciest tracked listing — scored on the share inside $15–$100

Brand share

Okay87%

top-5 brand share — brands hold most of the demand

Growth

Okay+2.3%

90-day search growth — must beat 0% to launch

Competition

Bad76%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United States niche tracking, fiberglass tub repair kit is a $908K/yr Amazon United States market (385K searches/yr). The top 5 brands hold 87% of demand. Verdict: Launch it — 56/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

fiberglass tub repair kit market data

Units sold / yr: 30K–40K; avg 2,500–3,000/product
Revenue / yr: $782K–$1.0M; units × avg price
Conversion rate: 9.0%
Avg BSR: #531
Page quality: 0%
Prime: 92%
Sponsored: 100%
Out of stock: 14.1%
Avg brand age: 49 months
Avg seller age: 164 days

Competition & brand share

The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.

Brands

10 flat

Sellers

Top-5 brand share

87%

Top 20: 100%

Top-5 click share

76%

Top 20: 100%

Open market

10%

Ankita48%
Globalcom18%
FENFANDAS10%
Auensten6%
Endhokn5%
Afcancihe3%
Open — no brand owns it (4 brands, 10%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +2.3% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.2×

Open Trend

Top fiberglass tub repair kit search terms

fiberglass tub repair kit70K/yr +0.1%6.8% conv.
bathtub repair kit55K/yr +12.3%6.3% conv.
tub repair kit49K/yr +11.8%7.4% conv.
fiberglass shower repair kit23K/yr +8.5%7.2% conv.
tub repair kit white22K/yr -11.0%9.3% conv.
shower repair kit16K/yr -0.9%4.8% conv.
bathtub repair kit white17K/yr -7.4%8.5% conv.
acrylic tub repair kit16K/yr -7.1%7.3% conv.
bathtub patch kit14K/yr +21.2%5.9% conv.
bath tub repair kit13K/yr -12.0%7.5% conv.

All search terms

Top fiberglass tub repair kit 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 13 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Tub Repair Kit White Tub Chip and Bathtub Repair Kit for Enamel Fiberglass Acrylic Porcelain Patch and Repairs Chips Crack Scratches Rust Holes on Tubs Toilet Sink Shower Tray in Bathroom

Ankita$18.024.3★1,627 rev

Tub and Shower Repair Kit White Fiberglass Tub and Porcelain Repair Kit Acrylic Enamel Ceramics Tile Toilet and Sink Repair Kit Repair cracks fragments holes and pits Bathtub Repair Kit White

FENFANDAS$15.764.4★470 rev

Tub Repair Kit White Fiberglass Shower tub and Porcelain Sink Repair Kit Acrylic Enamel Ceramics Tile Toilet and Shower Bath Repair Kit Repair Cracks Fragments Holes and pits

Globalcom$15.984.2★489 rev

Tub and Fiberglass Shower Repair Kit (Color Match) 3.7oz Porcelain Repair Kit Porcelain Sink and Acrylic Bathtub Repair Kit White for Cracks Chips Dents Holes Almond/Biscuit/Bone

Globalcom$16.764.2★1,779 rev

Fiberglass Tub Repair Kit (Color Match) Fiberglass Shower and Acrylic Bathtub Repair Kit for Chips Cracks Holes on Porcelain Sink Almond Enamel Bath Tub Ceramic Tile Tub Surround & Shower Repair

Ankita$15.344.2★311 rev

Newest

by launch date

Bath Tub Repair Kit White FiberglassTub and Shower Repair Kit for Porcelain Sink Acrylic Bathtub Tile and Toilet Color Match Filler for Chips Cracks Dents Holes Almond Biscuit Bone (White)

Auensten$11.6517 rev

1mo ago

Bath Tub Repair Kit Fiberglass Tile and Shower Repair Kit Porcelain Repair Kit Bathtub Repair Kit Repair Chips Dents Cracks Scratches from Ceramic Marble Quartz Resin Acrylic

Auensten$11.9419 rev

3mo ago

Bondtech Porcelain Repair Kit White Bathtub & Tile Repair Kit for Tub Enamel Fiberglass Acrylic Porcelain Ceramic Marble Granite Chips Dents Cracks Hole (100)

Bondtech$11.7321 rev

4mo ago

White Bathtub Repair Kit - Permanent Chip & Crack Fix 1pcs

Afcancihe$10.3685 rev

1y ago

Tub and Shower Repair Kit White Fiberglass Tub and Porcelain Repair Kit Acrylic Enamel Ceramics Tile Toilet and Sink Repair Kit Repair cracks fragments holes and pits Bathtub Repair Kit White

FENFANDAS$15.76470 rev

1y ago

What buyers say about fiberglass tub repair kit

What buyers praise and complain about, mined from review topics.

What buyers love

Ease Of Use17%

“making it very convenient”

Efficiency11%

“Works well on chips”

Quality-Overall10%

“Overall, it did what I needed it to do, and I was pleased with the results”

Advertised Vs Actual Product10%

“as advertised”

Color8%

“Perfect color”

Maintenance And Repair6%

“Repair worked great”

Instructions/User Manual/Troubleshooting5%

“The instructions are easy to follow”

Value For Money3%

“Great deal”

Durability2%

“Seems durable”

Functionality-Overall2%

“Got the job done”

What buyers complain about

Color15%

“Turns yellow”

Functionality-Overall11%

“Doesnt work well”

Paint Quality9%

“Peeling paint”

Size-Overall6%

“Small bottle”

Ease Of Use6%

“Difficult to use”

Quality-Overall6%

“Not a quality product”

Adhesion/Stickiness4%

“the repair peeled off when I removed the provided tape”

Durability4%

“It almost immediately broke down”

Ease Of Cleaning3%

“I made a mess”

Instructions/User Manual/Troubleshooting2%

“The instructions dont clearly specify how much of each product to use”

Top return reasons

Color24%

Maintenance And Repair14%

Paint Quality13%

Functionality-Overall12%

Size-Overall6%

Advertised Vs Actual Product6%

Defective Material/Parts5%

Value For Money4%

Adhesion/Stickiness2%

Product Condition2%

Common questions

Is fiberglass tub repair kit profitable to sell on Amazon United States?: The niche generates $908K/yr across 13 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +2.3%. Flapen's verdict: Launch it (56/100).
How competitive is the fiberglass tub repair kit niche?: 10 brands and 13 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 87% of demand.
What do buyers complain about in fiberglass tub repair kit?: Top complaints mined from reviews: Color, Functionality-Overall, Paint Quality. The return rate is 1.7%.
When does demand for fiberglass tub repair kit peak?: Demand is steady year-round — the busiest month runs 1.2× the quietest.
What does it cost to enter the fiberglass tub repair kit niche?: Listings span $9.76–$168.69; the average listing price is $26.08 (sweet spot $15–$100). The average incumbent carries 1,246 reviews — the moat a new listing must climb.