crack filler
Worth a lookShows low returns (0.0%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Incredible$33.96avg listing price — sweet spot $15–$100
Market size
Great$1.3M$1.3M/yr · 462K searches
Conversion
Great8.1%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.5★avg incumbent rating — lower means beatable quality
Price range
Okay$8.17–$189.38cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+9.3%90-day search growth — must beat 0% to launch
Review moat
Okay3,425.55avg incumbent reviews — the moat a new listing must climb
Competition
Bad79%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, crack filler is a $1.3M/yr Amazon United States market (462K searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 52/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
crack filler market data
- Units sold / yr
- 40K–50K
- avg 3,000–4,000/product
- Revenue / yr
- $1.4M–$1.7M
- units × avg price
- Conversion rate
- 8.1%
- Avg BSR
- #37
- Page quality
- 0%
- Prime
- 73%
- Sponsored
- 82%
- Out of stock
- 0.0%
- Avg brand age
- 40 months
- Avg seller age
- 158 days
Competition & brand share
The top 5 products capture 79% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 falling
Sellers
113
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
79%
Top 20: 100%
Open market
0%
- Great Stuff82%
- DOW CHEMICAL9%
- SPRAYMAN3%
- Loctite3%
- GREAT STUFF PRO3%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +9.3% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.6×
Top crack filler search terms
- great stuff spray foam219K/yr
- gap filler79K/yr
- great stuff65K/yr
- great stuff gaps and cracks19K/yr
- great stuff foam18K/yr
- wall gap filler10K/yr
- gap filler for wall15K/yr
- gap sealer6K/yr
- great stuff expanding foam5K/yr
- great stuff gaps and cracks spray foam3K/yr
Top crack 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 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Great Stuff 99108824 Smart Dispenser Gaps & Cracks Cream 12 Ounce
Great Stuff$8.224.5★9,283 rev
Great Stuff 99112809 Smart Dispenser Pestblock Gray
Great Stuff$10.414.3★4,828 rev
DOW Chemical 157901 Great Stuff Expanding Spray Foam Sealant 12 oz - 441002
DOW CHEMICAL$8.914.5★465 rev
Great Stuff Gaps and Cracks Insulating Foam Sealant 12 Ounce - Case of 12
Great Stuff$51.324.7★814 rev
Great Stuff 99112849 Smart Dispenser Pond & Stone 12 oz Black
Great Stuff$13.514.5★3,267 rev
Newest
by launch date
Sprayman Pest Block Spray Foam - (2x12oz) 100% Odor-Free! Mouse - Rodent Repellent & Strong Polyurethane Mouse Blocker Foam Sealant Use Wall Foam Filler for Holes and Cracks Over Paintable- 2 Pack
SPRAYMAN$24.11645 rev
Great Stuff 157911 Insulating Foam Sealant 20 Ounce Ivory (Pack of 2)
Great Stuff$33.901,901 rev
Loctite Tite Foam Big Gaps Spray Foam Sealant 12 fl oz Can 1 Pack - Polyurethane Expanding Insulation
Loctite$8.1711,732 rev
Great Stuff 99112876 Smart Dispenser Multipurpose Black 12 Oz.
Great Stuff$10.772,326 rev
Great Stuff 99108824 Smart Dispenser Gaps & Cracks Cream 12 Ounce
Great Stuff$8.229,283 rev
Trending
90-day click momentumGreat Stuff 99112849 Smart Dispenser Pond & Stone 12 oz Black
Great Stuff$13.514.5★
Sprayman Pest Block Spray Foam - (2x12oz) 100% Odor-Free! Mouse - Rodent Repellent & Strong Polyurethane Mouse Blocker Foam Sealant Use Wall Foam Filler for Holes and Cracks Over Paintable- 2 Pack
SPRAYMAN$24.114.3★
DOW Chemical 157901 Great Stuff Expanding Spray Foam Sealant 12 oz - 441002
DOW CHEMICAL$8.914.5★
Great Stuff 99112809 Smart Dispenser Pestblock Gray
Great Stuff$10.414.3★
Great Stuff 99108824 Smart Dispenser Gaps & Cracks Cream 12 Ounce
Great Stuff$8.224.5★
What buyers say about crack filler
What buyers praise and complain about, mined from review topics.What buyers love
“One cannworked great”
“It works as it should be”
“Works ok”
“Easy peasy”
“Totally worth the money”
“This expanding foam is exactly what I needed for some home repairs”
“Good color”
“The spray nozzle was good”
“Works great”
“Good product, does what was designed to do”
What buyers complain about
“Didn't spray”
“Its not Grey”
“leaks out of wrong end of tube”
“It does not stick well enough”
“Not easy to use”
“Never worked”
“Created a HUGE mess”
“Not good quality”
“It wouldn't dispense properly”
“Clogged”
Common questions
- Is crack filler profitable to sell on Amazon United States?
- The niche generates $1.3M/yr across 11 tracked products. 90-day search growth is +9.3%. Flapen's verdict: Worth a look (52/100).
- How competitive is the crack filler niche?
- 5 brands and 113 sellers compete. The top 5 products take 79% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in crack filler?
- Top complaints mined from reviews: Spray/Flow, Color, Leak-Proof. The return rate is 0.0%.
- When does demand for crack filler peak?
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- What does it cost to enter the crack filler niche?
- Listings span $8.17–$189.38; the average listing price is $33.96 (sweet spot $15–$100). The average incumbent carries 3,426 reviews — the moat a new listing must climb.