Window Sill Cover
FailShoppers spend an estimated $52K a year here, so Window Sill Cover is a Fail.
- Flapen Score
- 46 / 100Ranks 1,352 of 2,225 DIY & Tools niches · −3 vs the category median of 4946
- Market size
- £52K/yr322K searches / yr
- 90-day growth
- -20.3%search demand this quarter
- Competition
- 36%top-5 click share · 13 brands · 19 sellers
Flapen Score
Window Sill Cover against its category
The dotted line is the DIY & Tools average. Past it, Window Sill Cover is stronger. Inside it, weaker.
Market
The Window Sill Cover market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Window Sill Cover 322K times last year and spent an estimated £52K. The top 5 brands take 84% of clicks. Flapen scores it 46 out of 100, a Fail.
01 · Demand
An estimated 1.3% of those searches ended in a purchase.
Shoppers searched for this 322K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 1.3% of those searches ended in a purchase. Searches in the last 90 days moved -20.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated £52K a year.
- Searches, last 12 months
- 322K
- Growth, 90 days vs prior 90
- -20.3%
- Conversion, latest week
- 1.3%
- Market size, estimated
- £52Ka year
- Peak month
- February1.5× the quietest month
- Top search term
- window sill cover81K searches a year
02 · Price
A sale here is worth £12.54.
Listings sell for £12.54 on average, from £2.98 to £28.78. Amazon reports units sold in ranges. This niche sold 5K to 6K a year. The average listing sells 100 to 250 of them. At £12.54 that is £1K to £3K a year per listing.
- Average price
- £12.54under the $15 to $100 sweet spot
- Price range
- £2.98–£28.78
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 5K–6K
- Units per listing a year
- 100–250
- Revenue per listing a year
- £1K–£3K
- Returns
- 0.5%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
64% of listings pay for placement with sponsored ads. 25% ship with Prime. On an average day, 3.0% of listings are out of stock. The average listing ranks #275 within Building Supplies. It carries 293 reviews at 4.40 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 64%
- Prime listings
- 25%
- Out of stock, average day
- 3.0%
- Average rank
- #275in Building Supplies
- Average rating
- 4.40 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 293per listing
- Listings tracked
- 44
04 · Newcomers
0 of last year's 9 launches cleared the first-year sales bar.
9 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 34 months on average, so a newcomer is not facing entrenched names.
- Launched, last 12 months
- 9
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 34 months
Products
Top Window Sill Cover 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
Window Sill Capping Board - Square Edge Window Board Sill Cover - Plastic Window Cill Cover - 150mm (W) x 1 Metre (L) x 9mm (T)
- Price
- £7.37
- Rating
- 4.6/5
- Reviews
- 166
- Age
- 2y ago

Acidea Diatomaceous Earth Mat for Windowsill 20x290cm Long Super Absorbent Rubber Backed Non-Slip Windowsill Protector Mats Quick Drying Easy to Clean Cuttable Absorbent Window Sill Cover
- Price
- £15.88
- Rating
- 4.7/5
- Reviews
- 15
- Age
- 9mo ago

Window Sill Capping Board - Square Edge Window Board Sill Cover - Plastic Window Cill Cover - 200mm (W) x 1 Metre (L) x 9mm (T)
- Price
- £8.19
- Rating
- 4.6/5
- Reviews
- 166
- Age
- 2y ago

Window Board Sill Capping Cover (1.25m) - White 225mm
- Price
- £5.59
- Rating
- 4.5/5
- Reviews
- 69
- Age
- 11mo ago

225mm Wide x 2m Long Windows4You uPVC Capping Board White incl. End Caps Fascia Roofline & Soffit Cover Trim Low-Maintenance PVC 1 Pack
- Price
- £19.55
- Rating
- 4.6/5
- Reviews
- 80
- Age
- 1y ago
Trending
estimated 90-day click momentum
180mm Wide x 1m Long Windows4You White uPVC Bullnose Window Sill Cover Rounded-Edge Cill Capping Board Low-Maintenance PVC 2 Pack
- Price
- £18.10
- Rating
- 0.0/5
- Reviews
- 0
- Age
- 4mo ago

210mm Wide x 1m Long Windows4You White uPVC Bullnose Window Sill Cover Rounded-Edge Cill Capping Board Low-Maintenance PVC 2 Pack
- Price
- £20.15
- Rating
- 5.0/5
- Reviews
- 2
- Age
- 4mo ago

240mm Wide x 1m Long Windows4You White uPVC Bullnose Window Sill Cover Rounded-Edge Cill Capping Board Low-Maintenance PVC 2 Pack
- Price
- £22.17
- Rating
- 5.0/5
- Reviews
- 1
- Age
- 4mo ago

Pure Colour Windows Seat Cushions Grey Concise Window Sill Protector Mat with Non Slip Backed Potted Plant Waterproof Liner Pad Guard(60x15cm/24x6in)
- Price
- £7.32
- Rating
- 4.4/5
- Reviews
- 4
- Age
- 10mo ago

Acidea Diatomaceous Earth Mat for Windowsill 20x290cm Long Super Absorbent Rubber Backed Non-Slip Windowsill Protector Mats Quick Drying Easy to Clean Cuttable Absorbent Window Sill Cover
- Price
- £15.88
- Rating
- 4.7/5
- Reviews
- 15
- Age
- 9mo ago
Newest
by launch date
240mm Wide x 1m Long Windows4You White uPVC Bullnose Window Sill Cover Rounded-Edge Cill Capping Board Low-Maintenance PVC 2 Pack
- Price
- £22.17
- Rating
- 5.0/5
- Reviews
- 1
- Age
- 4mo ago

180mm Wide x 1m Long Windows4You White uPVC Bullnose Window Sill Cover Rounded-Edge Cill Capping Board Low-Maintenance PVC 2 Pack
- Price
- £18.10
- Rating
- 0.0/5
- Reviews
- 0
- Age
- 4mo ago

210mm Wide x 1m Long Windows4You White uPVC Bullnose Window Sill Cover Rounded-Edge Cill Capping Board Low-Maintenance PVC 2 Pack
- Price
- £20.15
- Rating
- 5.0/5
- Reviews
- 2
- Age
- 4mo ago

Acidea Diatomaceous Earth Mat for Windowsill 20x290cm Long Super Absorbent Rubber Backed Non-Slip Windowsill Protector Mats Quick Drying Easy to Clean Cuttable Absorbent Window Sill Cover
- Price
- £15.88
- Rating
- 4.7/5
- Reviews
- 15
- Age
- 9mo ago

Pure Colour Windows Seat Cushions Grey Concise Window Sill Protector Mat with Non Slip Backed Potted Plant Waterproof Liner Pad Guard(60x15cm/24x6in)
- Price
- £7.32
- Rating
- 4.4/5
- Reviews
- 4
- Age
- 10mo ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 36% of clicks, no more. An open shelf where new products get seen.
Brands
13 falling
Sellers
19
Est. top-5 brand share
84%
Top 20: 100%
Est. top-5 click share
36%
Top 20: 77%
Open market
11%
- WINDOWS 4 YOU26%
- Virtual Plastics22%
- Eurocell17%
- Acidea11%
- Truly PVC Limited8%
- Generic5%
- Open — no brand owns it (7 brands, 11%)
Demand
Window Sill Cover search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.5×
Search terms
Top Window Sill Cover search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- window sill cover81K/yr
- window sill32K/yr
- upvc window sill end caps18K/yr
- windowsill cover21K/yr
- pvc window sill20K/yr
- upvc window sill covers14K/yr
- fascia board13K/yr
- window sill end caps11K/yr
- window sill protector10K/yr
- window board13K/yr
Reviews and returns
What reviews say buyers love and hate about Window Sill Cover
We read the reviews and the return reasons for every product selling here.
“its OK, it's 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.
18 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Window Sill Cover 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








