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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

An estimated 11.2% of those searches ended in a purchase.

Shoppers searched for this 56K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 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

0 of last year's 1 launches cleared the first-year sales bar.

1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. 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

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 22, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 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

Est. top-5 brand share

88%

Top 20: 100%

Est. 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 estimated 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

We read the reviews and the return reasons for every product selling here.

24%of positive reviews mention “Quality-Overall”
24%of negative reviews mention “Ease Of Use”
0.6%of orders come back
“Impossible to squeeze”
A buyer, on “Ease Of Use”24% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

16 topics

NegativePositive

FAQ

Common Mastic questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data