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Kilner Jar Seals

prices mostly outside the sweet spot ($2.80–$7.23) — Kilner Jar Seals doesn't clear our bar today.

Flapen Score

36
Skip it

Ranks 5,242 of 5,777 Home & Garden niches · −15 vs the category median of 51

Market size 17Growth 16Conversion 100Competition 14Returns 99Price range 0Avg price 13Brand share 17Review moat 75Quality gap 30
This niche Category average · 5,777 niches

Is Kilner Jar Seals profitable on Amazon?

According to Flapen's Amazon United Kingdom niche tracking, Kilner Jar Seals is a £69K/yr Amazon United Kingdom market (76K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Aug–Sep–Oct–Nov. Verdict: Skip it — 36/100.

Kilner Jar Seals: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Not really. Search demand moved -18.2% over the last 90 days and 19.9% of searches end in a purchase.

£69K

revenue / yr

Units sold / yr15K
Search volume / yr-18.2%76K
Conversion rate19.9%
Avg price£4.59

Who owns the niche?

The top 5 brands hold 93% of demand, so 7% of the market is open.

7%

open market share

Brands · sellers7 · 39
Top-5 product click share83%
Open market7%
Avg brand age30 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.6★ — the gap to enter on.

0/100

page quality · 9 products

Sponsored placement67%
New entrants (1y)1· 0 succeeded
Avg rating4.6★
Avg reviews515

Top Kilner Jar Seals products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.

£0£10K£21K£31K£42K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

7 flat

Sellers

39

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

83%

Top 20: 100%

Open market

3%

  • Kilner68%
  • Plurvian8%
  • Vierone7%
  • XNBTFK5%
  • Eclovane5%
  • ZINNIAUK4%
  • Open — no brand owns it (1 brand, 3%)

Kilner Jar Seals demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume76KCVR19.9%Products9Brands7Top 5 Brands93%OOS Rate0.0%Rating4.6★Reviews515Avg BSR#54
3K2KPrime Day '25Spike '25DecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun

Peak months: Aug, Sep, Oct, Nov · busiest ÷ quietest = 2.7×

Top Kilner Jar Seals search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • kilner jar seals60K/yr
  • kilner jar seals replacement5K/yr
  • rubber jar seals4K/yr
  • jar seals4K/yr
  • rubber seals for kilner jars3K/yr

What reviews say buyers love and hate about Kilner Jar Seals

What buyers mention most, as a share of all reviews.

What buyers love

95% of reviews
Size-Overall34%

Fit great

Quality-Overall23%

Good quality

Advertised Vs Actual Product11%

does its job

Value For Money6%

Excellent value

Locking Mechanism5%

Very happy with the seals

What buyers complain about

83% of reviews
Size-Overall33%

Wrong size for killer

Thickness25%

Too thin

Smell17%

There is a serious flaw with these seals for they emit the sharp piercing cheap fragrance of a house cleaner

Leak-Proof8%

jars are leaking

Kilner Jar Seals return rate & reasons

Why buyers send it back, as a share of all return requests.

0.3%

Return rate

85%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Size-Overall
71%
2Advertised Vs Actual Product
9%
3Color
8%
4Compatibility-Overall
5%
5Quality-Overall
3%

Common Kilner Jar Seals questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Kilner Jar Seals 36/100 on Amazon United Kingdom — Skip it. The niche generates £69K/yr across 9 tracked products. 0 of 1 products launched in the last 360 days are still selling. Search demand moved -18.2% over the last 90 days.
Search demand for Kilner Jar Seals on Amazon United Kingdom peaks in Aug–Sep–Oct–Nov, where the busiest month runs 2.7× the quietest.