Mastic
prices mostly outside the sweet spot ($2.57–$10.65) — Mastic doesn't clear our bar today.
Flapen Score
Is Mastic profitable on Amazon?
According to Flapen's Amazon United Kingdom niche tracking, Mastic is a £43K/yr Amazon United Kingdom market (56K searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Sep–Oct. Verdict: Skip it — 39/100.
Mastic: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Not really. Search demand moved -6.0% over the last 90 days and 11.2% of searches end in a purchase.
£43K
revenue / yr
Who owns the niche?
The top 5 brands hold 88% of demand, so 12% of the market is open.
12%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.4★ — the gap to enter on.
0/100
page quality · 16 products
Top Mastic products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
Everbuild General Purpose Silicone Sealant Waterproof Suitable for Interior and Exterior Use Clear 280ml
- Price
- £2.57
- Rating
- 4.5/5
- Reviews
- 7,522
- Age
- 19y ago
UniBond Outdoor Window and Door Frame Sealant Premium Silicone Sealant Suitable for Use on Various Materials* Waterproof and Weather Resistant White 1 x 392g Cartridge
- Price
- £7.04
- Rating
- 4.5/5
- Reviews
- 2,314
- Age
- 10y ago
Gorilla 1144110 All Conditions Sealant Silicone Clear 295ml
- Price
- £9.02
- Rating
- 4.6/5
- Reviews
- 5,330
- Age
- 7y ago
EVO-STIK Multipurpose Silicone Sealant Clear - Waterproof - Mould Resistant - Lasts Up To 25 Years - Interior and Exterior Use
- Price
- £5.27
- Rating
- 4.5/5
- Reviews
- 1,236
- Age
- 19y ago
UniBond Outdoor Extreme Repair Sealant Polymer Based Outdoor Sealant Suitable for Use on Various Materials* Weather Resistant and Waterproof Translucent 1 x 389g Cartridge
- Price
- £10.62
- Rating
- 4.4/5
- Reviews
- 535
- Age
- 3y ago
Trending
90-day click momentum
Gorilla Window & Door Clear Silicone Sealant 295ml Mould Resistant 100% Waterproof Sealant Rain Ready in 30 Minutes Shrink & Crack Proof Sealant | Use on Window Frames Doors & More
- Price
- £9.40
- Rating
- 4.5/5
- Reviews
- 451
- Age
- 1mo ago
EVO-STIK Sticks Like Sh*t Waterproof Sealant Clear - 290ml - All-Purpose - Mould resistant
- Price
- £6.47
- Rating
- 4.5/5
- Reviews
- 1,127
- Age
- 10y ago
All-in-One Hybrid Polymer Sealant & Adhesive - Anti-Mould Waterproof Paintable & Fast Curing (IVORY 290ml)
- Price
- £5.31
- Rating
- 4.3/5
- Reviews
- 160
- Age
- 1y ago
Hemway Jet Black Construction Sealant & Adhesive 300ml - 1 Pack
- Price
- £8.50
- Rating
- 4.4/5
- Reviews
- 3,009
- Age
- 2y ago
Everbuild General Purpose Silicone Sealant Waterproof Suitable for Interior and Exterior Use White 280ml
- Price
- £3.01
- Rating
- 4.5/5
- Reviews
- 7,891
- Age
- 19y ago
Newest
by launch dateGorilla Window & Door Clear Silicone Sealant 295ml Mould Resistant 100% Waterproof Sealant Rain Ready in 30 Minutes Shrink & Crack Proof Sealant | Use on Window Frames Doors & More
- Price
- £9.40
- Rating
- 4.5/5
- Reviews
- 451
- Age
- 1mo ago
STYX Clear Sealant Waterproof Window Sealers Outdoor Sealer for Leaks Concrete Glass Metal Shower Sealant Marine Grade Aquatic Hybrid Adhesive Caulking MS Polymer Clear Adhesive 300ml
- Price
- £10.47
- Rating
- 4.3/5
- Reviews
- 115
- Age
- 1y ago
Silicone Sealant | Clear Silicone Sealant with Finishing Tool For a Smooth & Professional Finish | Waterproof & Anti-Mould Protection
- Price
- £7.39
- Rating
- 4.0/5
- Reviews
- 1,121
- Age
- 1y ago
All-in-One Hybrid Polymer Sealant & Adhesive - Anti-Mould Waterproof Paintable & Fast Curing (IVORY 290ml)
- Price
- £5.31
- Rating
- 4.3/5
- Reviews
- 160
- Age
- 1y ago
Hemway Crystal Clear Construction Sealant & Adhesive 300ml - 1 Pack
- Price
- £10.65
- Rating
- 4.4/5
- Reviews
- 3,009
- Age
- 2y ago
Competition: brands, sellers & click share
The top 5 products take 70% of clicks — established leaders, but buyers still shop beyond them.
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%)
Mastic demand & seasonality
Weekly search volume, with the niche's key stats alongside.
Peak months: Sep, Oct · busiest ÷ quietest = 2.2×
Top Mastic search terms shoppers use
The exact queries 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
What reviews say buyers love and hate about Mastic
What buyers mention most, as a share of all reviews.
What buyers love
83% of reviews“Excellent Product”
“Decent price”
“As advertised”
“Easy to use”
“great sticky stuff”
What buyers complain about
63% of reviews“Impossible to squeeze”
“Not an adhesive”
“Too thick and incredibly hard to squeeze out of tube”
“Doesnt work, dont waste your money”
“Was not very good for the job came apart in 3 days”
Mastic return rate & reasons
Why buyers send it back, as a share of all return requests.
0.6%
Return rate
61%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common Mastic questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
