Filling Knife
FailProducts sell for $6.14 on average, outside the sweet spot, so Filling Knife is a Fail.
- Flapen Score
- 48 / 100Ranks 1,131 of 2,225 DIY & Tools niches · −1 vs the category median of 4948
- Market size
- £199K/yr229K searches / yr
- 90-day growth
- -12.5%search demand this quarter
- Competition
- 65%top-5 click share · 14 brands · 75 sellers
Flapen Score
Filling Knife against its category
The dotted line is the DIY & Tools average. Past it, Filling Knife is stronger. Inside it, weaker.
Market
The Filling Knife market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Filling Knife 229K times last year and spent an estimated £199K. The top 5 brands take 74% of clicks. Flapen scores it 48 out of 100, a Fail.
01 · Demand
An estimated 14.2% of those searches ended in a purchase.
Shoppers searched for this 229K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 14.2% of those searches ended in a purchase. Searches in the last 90 days moved -12.5% against the 90 days before. Searches, conversion and average price together put the market at an estimated £199K a year.
- Searches, last 12 months
- 229K
- Growth, 90 days vs prior 90
- -12.5%
- Conversion, latest week
- 14.2%
- Market size, estimated
- £199Ka year
- Peak month
- February1.6× the quietest month
- Top search term
- filling knife78K searches a year
02 · Price
A sale here is worth £6.14.
Listings sell for £6.14 on average, from £2.07 to £21.16. Amazon reports units sold in ranges. This niche sold 30K to 40K a year. The average listing sells 2,000 to 2,500 of them. At £6.14 that is £12K to £15K a year per listing.
- Average price
- £6.14under the $15 to $100 sweet spot
- Price range
- £2.07–£21.16
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 30K–40K
- Units per listing a year
- 2,000–2,500
- Revenue per listing a year
- £12K–£15K
- Returns
- 0.3%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is reviews.
33% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 5.0% of listings are out of stock. The average listing ranks #15 within Painting Supplies, Tools & Wall Treatments. It carries 1,635 reviews at 4.48 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 33%
- Prime listings
- 100%
- Out of stock, average day
- 5.0%
- Average rank
- #15in Painting Supplies, Tools & Wall Treatments
- Average rating
- 4.48 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 1,635per listing
- Listings tracked
- 18
04 · Newcomers
1 of last year's 2 launches cleared the first-year sales bar.
2 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 42 months on average, so the names here are settling in.
- Launched, last 12 months
- 2
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 42 months
Products
Top Filling Knife 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.
Top sellers
by estimated 90-day click share
Harris Seriously Good Continental Filling Knives 4 Pack 102064328
- Price
- £2.31
- Rating
- 4.6/5
- Reviews
- 3,920
- Age
- 6y ago
KZXXZH Wallpaper Scrapers 1.5 3 4 5 Wide Putty Knife Set Metal Spackle Knives Paint Tools for Wallpaper/Decals/Drywall Finishing/Plaster Scraping (4 Pack)
- Price
- £5.38
- Rating
- 4.5/5
- Reviews
- 2,887
- Age
- 5y ago
Harris Trade Filling Knife 2
- Price
- £4.01
- Rating
- 4.6/5
- Reviews
- 106
- Age
- 2y ago
7 Piece Stainless Steel Wallpaper Scraper and Paint Tool Set With Filling Knives Spackle Drywall Joint Filler Putty Knife for Plastering Walls - Includes Tool Bag Hand Tools Gifts for Men
- Price
- £12.45
- Rating
- 4.3/5
- Reviews
- 139
- Age
- 3y ago
Sukudon 4 Pieces shankless Blade Painting Tools Seriously Good Continental Filling Knives (45MM+65MM+85MM+105MM)
- Price
- £4.93
- Rating
- 4.4/5
- Reviews
- 262
- Age
- 5y ago
Trending
estimated 90-day click momentum
G4GADGET Wallpaper Scraper 3 Inch Stainless Steel Paint & Putty Scraper with Soft Grip Handle Heavy Duty DIY Scraper Tool for Wallpaper Steamer Removal Drywall Filler Glass/Window & Hob Cleaning
- Price
- £3.33
- Rating
- 4.4/5
- Reviews
- 8
- Age
- 8mo ago
WINICE Paint Scraper Set 4 Pack Stainless Steel Putty Knives (2 4 6 8) with Soft Grip Handle Wallpaper Remover & Plastering Tools for Drywall Paint and Wall Repair
- Price
- £8.96
- Rating
- 4.4/5
- Reviews
- 82
- Age
- 1y ago
Axus Decor Pro-Fill (Blue Series) Stainless Steel Flexible Filling Knife Filler Knife - Putty Knife for Professional & DIY Projects - Anti Rust Blade and Rubberized Handle - 2 Inch/ 50mm
- Price
- £4.96
- Rating
- 4.7/5
- Reviews
- 1,377
- Age
- 11y ago
ZAVIA Continental Filling Knives Pack of 4 | Flexible Filling Knife | Stainless Steel Filler Spreader | Filling Knife Set for Holes Cracks & Walls | Filler Knife with Plastic Grip (Standard)
- Price
- £3.40
- Rating
- 4.2/5
- Reviews
- 29
- Age
- 10mo ago
Sukudon 4 Pieces shankless Blade Painting Tools Seriously Good Continental Filling Knives (45MM+65MM+85MM+105MM)
- Price
- £4.93
- Rating
- 4.4/5
- Reviews
- 262
- Age
- 5y ago
Newest
by launch dateG4GADGET Wallpaper Scraper 3 Inch Stainless Steel Paint & Putty Scraper with Soft Grip Handle Heavy Duty DIY Scraper Tool for Wallpaper Steamer Removal Drywall Filler Glass/Window & Hob Cleaning
- Price
- £3.33
- Rating
- 4.4/5
- Reviews
- 8
- Age
- 8mo ago
ZAVIA Continental Filling Knives Pack of 4 | Flexible Filling Knife | Stainless Steel Filler Spreader | Filling Knife Set for Holes Cracks & Walls | Filler Knife with Plastic Grip (Standard)
- Price
- £3.40
- Rating
- 4.2/5
- Reviews
- 29
- Age
- 10mo ago
WINICE Paint Scraper Set 4 Pack Stainless Steel Putty Knives (2 4 6 8) with Soft Grip Handle Wallpaper Remover & Plastering Tools for Drywall Paint and Wall Repair
- Price
- £8.96
- Rating
- 4.4/5
- Reviews
- 82
- Age
- 1y ago
DEKEones 5 PCS Wallpaper Scrapers Set Stainless Steel Wall Filler Scrapers Strippers Remover 4 Paint Scrapers and 1 Multi Scraper Tool Filling Paint Stripper for Drywall Decals (1 3 4 6 10)
- Price
- £11.76
- Rating
- 4.5/5
- Reviews
- 3,406
- Age
- 1y ago
Harris Trade Filling Knife 2
- Price
- £4.01
- Rating
- 4.6/5
- Reviews
- 106
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 65% of clicks. Leaders hold, but buyers still shop past them.
Brands
14 falling
Sellers
75
Est. top-5 brand share
74%
Top 20: 100%
Est. top-5 click share
65%
Top 20: 100%
Open market
22%
- Harris41%
- KZXXZH14%
- Axus Decor8%
- YWYHHM6%
- Sukudon5%
- G4GADGET4%
Demand
Filling Knife search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.6×
Search terms
Top Filling Knife search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- filling knife78K/yr
- filler knife43K/yr
- filler tool27K/yr
- filling knife set21K/yr
- wall filler tool9K/yr
- filling knives10K/yr
- flexible filling knife6K/yr
- filler scraper5K/yr
- filler knife for walls5K/yr
- filling blades5K/yr
Reviews and returns
What reviews say buyers love and hate about Filling Knife
We read the reviews and the return reasons for every product selling here.
“I know theyre cheap”
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.
19 topics
Keep looking
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Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Filling Knife 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