flexible filler
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.3%return rate — above 5% kills the launch gate
Conversion
Incredible12.0%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Review moat
Okay2,805.22avg incumbent reviews — the moat a new listing must climb
Avg price
Bad£7.04avg listing price — sweet spot $15–$100
Growth
Bad-14.9%90-day search growth — must beat 0% to launch
Market size
Bad£45K£45K/yr · 53K searches
Competition
Bad89%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
Price range
Bad£2.60–£14.63cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, flexible filler is a £45K/yr Amazon United Kingdom market (53K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 33/100.
Data updated Jul 22, 2026 · scored weekly · How we score niches
flexible filler market data
- Units sold / yr
- 6K–8K
- avg 500–750/product
- Revenue / yr
- £42K–£56K
- units × avg price
- Conversion rate
- 12.0%
- Avg BSR
- #250
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 44%
- Out of stock
- 0.0%
- Avg brand age
- 60 months
- Avg seller age
- 172 days
Competition & brand share
The top 5 products capture 89% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 flat
Sellers
67
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
89%
Top 20: 100%
Open market
0%
- Toupret73%
- Ronseal17%
- Sika5%
- GORILLA3%
- Everbuild2%
Demand
Weekly Amazon search volume, last 33 weeks — -14.9% search growth over the last 90 days.Top flexible filler search terms
- toupret fill flex25K/yr
- flexible filler20K/yr
- flexible filler for wall cracks6K/yr
- toupret flexible filler3K/yr
Top flexible filler 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.
All 9 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Toupret FillFlex - Flexible & CrackResistant Interior Filler for Tough Surfaces - Elastic Compound for Cracks Movements & Control Joints - Easy Sand Paintable - 1 kg
Toupret£14.634.2★252 rev
310ml Toupret Fill-Flex Flexible Filler for Gaps and Cracks Fibacryl
Toupret£7.754.4★258 rev
Ronseal Smooth Finish Flexible Filler 330G Super Flexible Interior Wall Filler For Cracks And Holes Easy To Apply Smooth Finish Paintable Long-Lasting Repair Solution
Ronseal£3.864.3★1,115 rev
Everbuild FLEX-EBD Flexible Decorators Filler White 290 ml
Sika£3.644.5★1,638 rev
Toupret Quick Fill - Fast-Drying Ready Mixed Interior Filler for Walls & Ceilings - One Coat No Shrink No Crack - Quick Wall Repairs Paint in 30 Minutes - Smooth White Finish - Easily Applied - 1L
Toupret£11.124.6★101 rev
Newest
by launch date
Gorilla Smooth Finish Wall Filler 473ml Applies Purple & Dries White | Repairs Small and Large Holes in Walls & Ceiling Smooth Finish Wont Shrink or Crack Fills any Depth| Indoor & Outdoor Use
GORILLA£8.96326 rev
Toupret Quick Fill - Fast-Drying Ready Mixed Interior Filler for Walls & Ceilings - One Coat No Shrink No Crack - Quick Wall Repairs Paint in 30 Minutes - Smooth White Finish - Easily Applied - 1L
Toupret£11.12101 rev
Toupret FillFlex - Flexible & CrackResistant Interior Filler for Tough Surfaces - Elastic Compound for Cracks Movements & Control Joints - Easy Sand Paintable - 1 kg
Toupret£14.63252 rev
310ml Toupret Fill-Flex Flexible Filler for Gaps and Cracks Fibacryl
Toupret£7.75258 rev
Sika Caulk Once Premium Quality Acrylic Caulk Highly Flexible Fast Drying White 295ml
Everbuild£2.6011,812 rev
Trending
90-day click momentumSika Caulk Once Premium Quality Acrylic Caulk Highly Flexible Fast Drying White 295ml
Everbuild£2.604.5★
Gorilla Smooth Finish Wall Filler 473ml Applies Purple & Dries White | Repairs Small and Large Holes in Walls & Ceiling Smooth Finish Wont Shrink or Crack Fills any Depth| Indoor & Outdoor Use
GORILLA£8.964.6★
Ronseal 36560 Smooth Finish Super Flexible Filler Cartidge 300 ml
Ronseal£5.064.4★
Toupret Quick Fill - Fast-Drying Ready Mixed Interior Filler for Walls & Ceilings - One Coat No Shrink No Crack - Quick Wall Repairs Paint in 30 Minutes - Smooth White Finish - Easily Applied - 1L
Toupret£11.124.6★
Everbuild FLEX-EBD Flexible Decorators Filler White 290 ml
Sika£3.644.5★
What buyers say about flexible filler
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to use”
“Its well-made”
“Does what you expect”
“Reasonable price”
“Great finish”
“The colour change was really handy so i could see what bits were ready”
“very good drying time”
“works great”
“Perfect for quick touch-ups before painting”
“It also adheres well to most common surfaces like wood, plaster, and masonry”
What buyers complain about
“Absolutely terrible filler”
“Hard to use”
“Arrived having completely leaked out into the box”
“white is also wet in this case”
“Sets as hard as steel”
“Overall this is no better than the cheaper alternatives in my opinion”
“Dries to a grey that you cant paint over”
“Don't believe everything that's advertised”
“As its a small bottle I couldnt find one to fit”
“Fragile”
Top return reasons
Common questions
- Is flexible filler profitable to sell on Amazon United Kingdom?
- The niche generates £45K/yr across 9 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -14.9%. Flapen's verdict: Skip it (33/100).
- How competitive is the flexible filler niche?
- 5 brands and 67 sellers compete. The top 5 products take 89% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in flexible filler?
- Top complaints mined from reviews: Quality-Overall, Ease Of Use, Leak-Proof. The return rate is 0.3%.
- What does it cost to enter the flexible filler niche?
- Listings span £2.60–£14.63; the average listing price is £7.04 (sweet spot $15–$100). The average incumbent carries 2,805 reviews — the moat a new listing must climb.