bilco basement door weatherstrip kit
Worth a lookShows a sweet-spot price point ($37.64 avg), but a concentrated shelf (top 5 take 100% of clicks) keeps it on the watch list.
Avg price
Incredible$37.64avg listing price — sweet spot $15–$100
Price range
Incredible$21.13–$72.70cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Great138.17avg incumbent reviews — the moat a new listing must climb
Growth
Great+100.5%90-day search growth — must beat 0% to launch
Conversion
Great8.8%search→purchase rate — share of searches ending in a sale
Returns
Great2.0%return rate — above 5% kills the launch gate
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Market size
Bad$24K$24K/yr · 7K searches
Competition
Bad100%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, bilco basement door weatherstrip kit is a $24K/yr Amazon United States market (7K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Sep–Oct–Nov. Verdict: Worth a look — 52/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
bilco basement door weatherstrip kit market data
- Units sold / yr
- 750–1K
- avg 100–250/product
- Revenue / yr
- $28K–$38K
- units × avg price
- Conversion rate
- 8.8%
- Avg BSR
- #1,081
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 83%
- Out of stock
- 1.1%
- Avg brand age
- 44 months
- Avg seller age
- 188 days
Competition & brand share
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 rising
Sellers
12
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
100%
Top 20: 100%
Open market
0%
- Sxmprail52%
- Bilco19%
- CMILAI17%
- htskwa6%
- cowarca3%
- Frienda3%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +100.5% search growth over the last 90 days.Peak months: Sep, Oct, Nov · busiest ÷ quietest = 4.4×
Top bilco basement door weatherstrip kit 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 6 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
for Bilco Basement Door Weatherstrip Kit (4 Cap Seal Pad 1 Bulb Trim Gasket 1 U Shaped Gasket) Fit for Bilco and Gordon Cellar Doors Basement Door Seal Kit Five-Year Replacement
Sxmprail$36.964.2★219 rev
Authentic BILCO Brand Basement Door Weather Strip Kit
Bilco$72.704.1★535 rev
Basement Door Seal Kit for Bilco & Gordon Replacement Weatherstrip Set with U-Shaped Gasket Bulb Trim & Cap Seal Pads Fits Cellar Metal Doors
CMILAI$39.314.4★32 rev
Basement Door Weatherstrip Kit Fit for Gordon Bilco Cellar Doors Replacement for Bilco Door Seal
htskwa$29.954.4★28 rev
Basement Door Weatherstrip Kit (1 x U Shaped Gasket
cowarca$21.134.5★3 rev
Newest
by launch dateBasement Door Seal Kit for Bilco & Gordon Replacement Weatherstrip Set with U-Shaped Gasket Bulb Trim & Cap Seal Pads Fits Cellar Metal Doors
CMILAI$39.3132 rev
Basement Door Weatherstrip Kit (1 x U Shaped Gasket
cowarca$21.133 rev
Basement Door Weatherstrip Kit Fit for Gordon Bilco Cellar Doors Replacement for Bilco Door Seal
htskwa$29.9528 rev
Frienda Basement Door Weather Strip Kit 33 ft U Shaped Gasket and 13 ft Bulb Trim Gasket Rubber Door Seal Strip Bottom Door Weatherstrip for Window Garage Weatherstripping
Frienda$25.8012 rev
for Bilco Basement Door Weatherstrip Kit (4 Cap Seal Pad 1 Bulb Trim Gasket 1 U Shaped Gasket) Fit for Bilco and Gordon Cellar Doors Basement Door Seal Kit Five-Year Replacement
Sxmprail$36.96219 rev
Trending
90-day click momentumBasement Door Weatherstrip Kit (1 x U Shaped Gasket
cowarca$21.134.5★
Basement Door Seal Kit for Bilco & Gordon Replacement Weatherstrip Set with U-Shaped Gasket Bulb Trim & Cap Seal Pads Fits Cellar Metal Doors
CMILAI$39.314.4★
Basement Door Weatherstrip Kit Fit for Gordon Bilco Cellar Doors Replacement for Bilco Door Seal
htskwa$29.954.4★
for Bilco Basement Door Weatherstrip Kit (4 Cap Seal Pad 1 Bulb Trim Gasket 1 U Shaped Gasket) Fit for Bilco and Gordon Cellar Doors Basement Door Seal Kit Five-Year Replacement
Sxmprail$36.964.2★
Frienda Basement Door Weather Strip Kit 33 ft U Shaped Gasket and 13 ft Bulb Trim Gasket Rubber Door Seal Strip Bottom Door Weatherstrip for Window Garage Weatherstripping
Frienda$25.804.3★
What buyers say about bilco basement door weatherstrip kit
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to install”
“it was so easy”
“Fit Nicely”
“Definitely a good purchase for anyone looking to improve their basement door seal”
“product works well”
“Price is very affordable”
“efficient no leaks since installed”
“No more loud bang when the doors come down and close”
“They give you what looks like the thickest seal possible and a good and large amount of it”
“this kit gives a high amount of material”
What buyers complain about
“they are easily knocked off”
“It doesnt have snug fit on the bottom so water leaked in during rain”
“No instructions”
“I wish it was thicker so it would creat a better seal”
“Poor Seal, Still Leaks Air”
“Waste of money for me”
“door hard to close afterward”
“Junk”
“it doesn't close easily after install”
Top return reasons
Common questions
- Is bilco basement door weatherstrip kit profitable to sell on Amazon United States?
- The niche generates $24K/yr across 6 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +100.5%. Flapen's verdict: Worth a look (52/100).
- How competitive is the bilco basement door weatherstrip kit niche?
- 6 brands and 12 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in bilco basement door weatherstrip kit?
- Top complaints mined from reviews: Durability, Size-Overall, Instructions/User Manual/Troubleshooting. The return rate is 2.0%.
- When does demand for bilco basement door weatherstrip kit peak?
- Demand peaks in Sep–Oct–Nov; the busiest month runs 4.4× the quietest.
- What does it cost to enter the bilco basement door weatherstrip kit niche?
- Listings span $21.13–$72.70; the average listing price is $37.64 (sweet spot $15–$100). The average incumbent carries 138 reviews — the moat a new listing must climb.