Is kester solder profitable to sell on Amazon United States?

The niche generates $298K/yr across 17 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -2.6%. Flapen's verdict: Skip it (46/100).

How competitive is the kester solder niche?

5 brands and 24 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in kester solder?

Top complaints mined from reviews: Quality-Overall, Functionality-Overall, Ease Of Use. The return rate is 0.7%.

When does demand for kester solder peak?

Demand is steady year-round — the busiest month runs 1.7× the quietest.

What does it cost to enter the kester solder niche?

Listings span $5.05–$49.05; the average listing price is $24.23 (sweet spot $15–$100). The average incumbent carries 4,878 reviews — the moat a new listing must climb.

kester solder

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.7%

return rate — above 5% kills the launch gate

Avg price

Incredible$24.23

avg listing price — sweet spot $15–$100

Conversion

Great9.9%

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

Price range

Great$5.05–$49.05

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

Market size

Good$298K

$298K/yr · 124K searches

Competition

Okay67%

top-5 click share — leaders hold, buyers still browse

Review moat

Bad4,878.18

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-2.6%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, kester solder is a $298K/yr Amazon United States market (124K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 46/100.

Data updated Jul 30, 2026 · scored weekly · How we score niches

kester solder market data

Units sold / yr: 10K–13K; avg 500–750/product
Revenue / yr: $242K–$303K; units × avg price
Conversion rate: 9.9%
Avg BSR: #78
Page quality: 0%
Prime: 94%
Sponsored: 41%
Out of stock: 0.0%
Avg brand age: 50 months
Avg seller age: 175 days

Competition & brand share

The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them.

Brands

5 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

67%

Top 20: 100%

Open market

Kester65%
MAIYUM19%
TOWOT8%
HengTianMei6%
twocorn2%
Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -2.6% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.7×

Open Trend

Top kester solder search terms

kester solder34K/yr -10.7%6.0% conv.
63/37 rosin core solder13K/yr +11.1%10.3% conv.
kester solder 63/3715K/yr +3.6%10.1% conv.
63/37 solder13K/yr +4.4%8.8% conv.
kester 4413K/yr -9.4%8.7% conv.
kester6K/yr -5.7%2.7% conv.
kester 44 rosin core solder5K/yr +5.3%13.5% conv.
kester 63/374K/yr +5.7%10.1% conv.
63/37 leaded solder3K/yr +61.1%15.0% conv.
solder 63/374K/yr +0.5%10.8% conv.

All search terms

Top kester solder 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 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Kester 44 Solder Wire 63/37 0.031 RMA Rosin 1-ounce Tube

Kester$13.344.8★738 rev

MAIYUM 63-37 Tin Lead Rosin Core Solder Wire for Electrical Soldering (0.8mm 50g)

MAIYUM$8.534.6★22,279 rev

KESTER SOLDER 24-6040-0027 Wire Solder 0.031Dia. Pack of (1) 32117

Kester$44.474.9★2,698 rev

KESTER SOLDER 24-6337-0027 Solder Wire 63/37 SN/PB 183C 1LB (1) (1)

Kester$45.204.9★247 rev

TOWOT 63-37 High Purity Tin Lead Rosin Core Solder Wire for Electrical Soldering Content 1.8% Solder Flux (1.0mm 50g)

TOWOT$6.684.7★5,396 rev

Newest

by launch date

Kester 44 Solder Wire 60/40 0.025 RMA Rosin 3/4-ounce Tube

Kester$13.218 rev

5mo ago

Twocorn 63/37 Solder Wire high Purity no-wash tin-Lead Rosin cored Wire with 1.8% Flux for Electric Soldering (0.8mm 50g)

twocorn$5.05948 rev

2y ago

TOWOT 63-37 High Purity Tin Lead Rosin Core Solder Wire for Electrical Soldering Content 1.8% Solder Flux (1.0mm 50g)

TOWOT$6.685,396 rev

4y ago

HengTianMei 63/37 Rosin Core Tin Lead Solder Wire For Electrical Soldering(0.3mm/50g)

HengTianMei$8.761,391 rev

5y ago

HengTianMei Tin Lead 63/37 Rosin Core Low Temp Solder Wire For Electronics Components And DIY repair(0.8mm/50g)

HengTianMei$8.801,391 rev

5y ago

What buyers say about kester solder

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

What buyers love

Quality-Overall30%

“Excellent quality”

Advertised Vs Actual Product15%

“It is as described”

Value For Money13%

“Worth it”

Ease Of Use8%

“Easy to use”

Spray/Flow4%

“Flows good”

Heating3%

“Happy with how it melted quickly”

Size-Overall3%

“Right stuff, right size”

Functionality-Overall3%

“Works very well for electronics soldering”

Durability3%

“the long term use has always given me great results”

Connectivity-Overall3%

“Connections are solid”

What buyers complain about

Quality-Overall27%

“Poor quality control”

Functionality-Overall13%

“It doesn't work well either”

Ease Of Use8%

“extremely difficult to operate”

Spray/Flow8%

“Doesnt flow well”

Heating7%

“The melting temperature fluctuates wildly”

Value For Money5%

“Too expensive now”

Thickness4%

“needs to be twice as thick”

Size-Overall4%

“It doesn't conform to my nickel strip”

Adhesion/Stickiness3%

“does not stick wel”

Advertised Vs Actual Product2%

“This is false advertising”

Top return reasons

Size-Overall28%

Value For Money13%

Advertised Vs Actual Product12%

Thin9%

Functionality-Overall8%

Defective Material/Parts5%