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Mastic

Fail

Prices span $2.57–$10.65, mostly outside the sweet spot, so Mastic is a Fail.

Flapen Score
39
39 / 100
Ranks 1,901 of 2,225 DIY & Tools niches · −10 vs the category median of 49
Market size
£43K/yr56K searches / yr
90-day growth
-6.0%search demand this quarter
Competition
70%top-5 click share · 9 brands · 83 sellers

Flapen Score

Mastic against its category

The dotted line is the DIY & Tools average. Past it, Mastic is stronger. Inside it, weaker.

39Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Mastic market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Mastic 56K times last year and spent an estimated £43K. The top 5 brands take 88% of clicks. Demand peaks in Sep–Oct. Flapen scores it 39 out of 100, a Fail.

01 · Demand

11.2% of searches ended in a purchase last week.

Shoppers searched for this 56K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 11.2% of those searches ended in a purchase. Searches in the last 90 days moved -6.0% against the 90 days before. Searches, conversion and average price together put the market at an estimated £43K a year.

Searches, last 12 months
56K
Growth, 90 days vs prior 90
-6.0%
Conversion, latest week
11.2%
Market size, estimated
£43Ka year
Peak month
September2.2× the quietest month
Top search term
outdoor silicone sealant waterproof8K searches a year

02 · Price

A sale here is worth £6.94.

Listings sell for £6.94 on average, from £2.57 to £10.65. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 250 to 500 of them. At £6.94 that is £2K to £3K a year per listing.

Average price
£6.94under the $15 to $100 sweet spot
Price range
£2.57–£10.65
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
6K–8K
Units per listing a year
250–500
Revenue per listing a year
£2K–£3K
Returns
0.6%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is reviews.

88% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #95 within Adhesives & Sealers. It carries 2,722 reviews at 4.39 stars, so a new listing needs social proof before a better product.

Sponsored listings
88%
Prime listings
100%
Out of stock, average day
0.0%
Average rank
#95in Adhesives & Sealers
Average rating
4.39 starsAmazon United Kingdom average 4.36 stars
Average reviews
2,722per listing
Listings tracked
16

04 · Newcomers

Amazon counts 0 of last year's 1 launches as successful.

1 products launched here in the last 12 months. Amazon counts 0 of them as successful launches, new products that hit its first-year sales bar. The brands on the shelf have sold for 46 months on average, so the names here are settling in.

Launched, last 12 months
1
Successful launches
0Amazon's first-year sales bar
Average brand age
46 months

Products

Top Mastic products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Competition

Competition: brands, sellers & click share

The top 5 products take 70% of clicks. Leaders hold, but buyers still shop past them.

£0£4K£9K£13K£17K1001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

9 flat

Sellers

83

Top-5 brand share

88%

Top 20: 100%

Top-5 click share

70%

Top 20: 100%

Open market

6%

  • Everbuild33%
  • Unibond20%
  • GORILLA16%
  • EVO-STIK12%
  • Sika7%
  • Hemway6%
  • Open — no brand owns it (3 brands, 6%)

Demand

Mastic search demand

Weekly searches over the year, seasonality beneath. Pick a range.

3K2KSpike '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Sep, Oct · busiest ÷ quietest = 2.2×

Search terms

Top Mastic search terms shoppers use

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

  • outdoor silicone sealant waterproof8K/yr
  • outdoor sealant waterproof8K/yr
  • silicone sealant outdoor7K/yr
  • exterior silicone sealant clear5K/yr
  • exterior silicone sealant5K/yr
  • external sealant waterproof5K/yr
  • outdoor silicone sealant7K/yr
  • exterior sealant5K/yr
  • clear silicone sealant waterproof outdoor5K/yr

Reviews and returns

What reviews say buyers love and hate about Mastic

What buyers praise, what they complain about and why they send it back, from the reviews.

Complain

Ease Of Use24%−0.16

Impossible to squeeze

really difficult to use

Not user friendly

Adhesion/Stickiness7%+0.23

Not an adhesive

A bit sticky

Doesnt stick

Thickness7%−0.06

Too thick and incredibly hard to squeeze out of tube

It simply seemed too thick

The sealant was very thick

Functionality-Overall4%−0.03

Doesnt work, dont waste your money

Slow curing can be good or bad depending on what you want

Not a workable clear mastic

Durability4%−0.03

Was not very good for the job came apart in 3 days

Broke my gun trying to use it

it broke off

Love

Quality-Overall24%+1.49

Excellent Product

Good quality and appearance as clear coloured

It is a good and inexpensive product

Value For Money17%+1.05

Decent price

Great value

Great value

Advertised Vs Actual Product12%+0.74

As advertised

As described

just what you need

Ease Of Use9%−0.16

Easy to use

It was easy to apply

is easy to work with

Adhesion/Stickiness8%+0.23

great sticky stuff

Good adhesion

Sticks well

Return

0.6% Return rate 61% Fixable by listing

Color45%█▇▇▆▇▆

is cream rather than white

Turns yellow after a couple weeks and looks awful

Turns yellow

Functionality-Overall9%█▆▅▇▇▅

Doesnt work, dont waste your money

Slow curing can be good or bad depending on what you want

Not a workable clear mastic

Ease Of Use6%▂▃▆▄▄█

Impossible to squeeze

really difficult to use

Not user friendly

Adhesion/Stickiness5%▂▅█▄▃▄

Not an adhesive

A bit sticky

Doesnt stick

Defective Material/Parts4%▄▂▃▄▇█

FAQ

Common Mastic questions

Answered from the same tracked data.