basement waterproofing
Skip itBrand-locked demand (top 5 brands take 96% of clicks) — this niche doesn't clear our bar today.
Returns
Great1.1%return rate — above 5% kills the launch gate
Avg price
Great$61.92avg listing price — sweet spot $15–$100
Growth
Good+51.5%90-day search growth — must beat 0% to launch
Price range
Okay$6.63–$199.11cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Okay$192K$192K/yr · 106K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Conversion
Okay2.9%search→purchase rate — share of searches ending in a sale
Review moat
Okay2,968.75avg incumbent reviews — the moat a new listing must climb
Competition
Bad82%top-5 click share — a locked-up shelf
Brand share
Bad96%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, basement waterproofing is a $192K/yr Amazon United States market (106K searches/yr). The top 5 brands hold 96% of demand. Demand peaks in Apr–Jul–Aug–Sep. Verdict: Skip it — 45/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
basement waterproofing market data
- Units sold / yr
- 2K–3K
- avg 100–250/product
- Revenue / yr
- $124K–$155K
- units × avg price
- Conversion rate
- 2.9%
- Avg BSR
- #54
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 83%
- Out of stock
- 0.0%
- Avg brand age
- 64 months
- Avg seller age
- 157 days
Competition & brand share
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 falling
Sellers
49
Top-5 brand share
96%
Top 20: 100%
Top-5 click share
82%
Top 20: 100%
Open market
2%
- Liquid Rubber69%
- AMES9%
- KILZ8%
- Tufinein8%
- DAP3%
- Flex Seal2%
- Open — no brand owns it (1 brand, 2%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +51.5% search growth over the last 90 days.Peak months: Apr, Jul, Aug, Sep · busiest ÷ quietest = 5.2×
Top basement waterproofing search terms
- basement waterproofing system8K/yr
- foundation sealant12K/yr
- basement waterproofing13K/yr
- foundation sealer5K/yr
- basement sealer waterproof7K/yr
- basement wall sealer waterproof4K/yr
- liquid rubber foundation sealant5K/yr
- basement leak stopper2K/yr
- basement wall sealer5K/yr
- waterproof basement wall sealer6K/yr
Top basement waterproofing 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 12 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black 1 Gallon
Liquid Rubber$59.004.6★3,365 rev
Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black 5 Gallon
Liquid Rubber$158.964.6★3,365 rev
Ames Block & Wall Liquid Rubber Waterproofer Multi-Purpose Coating & Sealant - 1 Gallon - Perfect to Use As Concrete Sealer and Waterproofer for Basements and Foundations - Made in The USA White
AMES$49.324.6★337 rev
KILZ Basement and Masonry Waterproofing Paint White Interior/Exterior for Concrete Brick & Cinder Block Walls 1 Gallon
KILZ$35.924.7★1,235 rev
Rubber Liquid Waterproof Sealant TUFINEIN 53oz/1.5kg Neutral Gray Quick Drying Multi Surface Foundation Leak Repair - Roof Gutters Basement Sealer Waterproof - Indoor & Outdoor Flexible Rubber Paint
Tufinein$35.364.5★282 rev
Newest
by launch dateRubber Liquid Waterproof Sealant TUFINEIN 53oz/1.5kg Neutral Gray Quick Drying Multi Surface Foundation Leak Repair - Roof Gutters Basement Sealer Waterproof - Indoor & Outdoor Flexible Rubber Paint
Tufinein$35.36282 rev
Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black 2.5 Gallon
Liquid Rubber$98.223,365 rev
Transparent Waterproof Coating TUFINEIN 35oz Invisible Waterproof Agent Indoor & Outdoor Sealant Water-Based Clear Sealant Roofs Walls Garden Terraces
Tufinein$24.142,287 rev
Flex Caulk Waterproof & Weatherproof Hybrid Polymer Sealant Strong Paintable Indoor Outdoor Bath Shower Sink Window Baseboards Door RV Roof Wood Auto & Marine Clear 6.6 oz 1-Pack
Flex Seal$19.511,943 rev
Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black 5 Gallon
Liquid Rubber$158.963,365 rev
Trending
90-day click momentumTransparent Waterproof Coating TUFINEIN 35oz Invisible Waterproof Agent Indoor & Outdoor Sealant Water-Based Clear Sealant Roofs Walls Garden Terraces
Tufinein$24.144.4★
Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black 2.5 Gallon
Liquid Rubber$98.224.6★
Quick Dam Water Activated Flood Barrier 5 Feet 2-Pack
Quick Dam$22.374.4★
Liquid Rubber Waterproof Sealant DIY Leak Repair Coating for Flat Metal & Low Slope Roofs Foundations Gutters & More Flexible Protective Membrane - Black - 1 Quart
Liquid Rubber$34.554.4★
Flex Caulk Waterproof & Weatherproof Hybrid Polymer Sealant Strong Paintable Indoor Outdoor Bath Shower Sink Window Baseboards Door RV Roof Wood Auto & Marine Clear 6.6 oz 1-Pack
Flex Seal$19.514.5★
What buyers say about basement waterproofing
What buyers praise and complain about, mined from review topics.What buyers love
“Wonderful product as advertised”
“As advertised”
“Does the job”
“Easy to use”
“Worth the money”
“So far, no water leaks from windows”
“Durable waterproof membrane”
“Works great for small repairs”
“I put this to the test by painting on to an old tin roof of a pig shelter it went on nice”
“lasts, blends in”
What buyers complain about
“Overpriced mess”
“I have a small leak”
“Turns yellow after a while :”
“Junk”
“This is not waterproof in my porch”
“would not come out of tube”
“It is a bit thick”
“Didnt last”
“not very easy to use”
“may need to paint to match”
Top return reasons
Common questions
- Is basement waterproofing profitable to sell on Amazon United States?
- The niche generates $192K/yr across 12 tracked products. 90-day search growth is +51.5%. Flapen's verdict: Skip it (45/100).
- How competitive is the basement waterproofing niche?
- 7 brands and 49 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 96% of demand.
- What do buyers complain about in basement waterproofing?
- Top complaints mined from reviews: Value For Money, Leak-Proof, Color. The return rate is 1.1%.
- When does demand for basement waterproofing peak?
- Demand peaks in Apr–Jul–Aug–Sep; the busiest month runs 5.2× the quietest.
- What does it cost to enter the basement waterproofing niche?
- Listings span $6.63–$199.11; the average listing price is $61.92 (sweet spot $15–$100). The average incumbent carries 2,969 reviews — the moat a new listing must climb.