foam filler
Worth a lookShows low returns (0.2%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.2%return rate — above 5% kills the launch gate
Avg price
Incredible$39.38avg listing price — sweet spot $15–$100
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Competition
Good46%top-5 click share — leaders hold, buyers still browse
Conversion
Good5.7%search→purchase rate — share of searches ending in a sale
Brand share
Okay75%top-5 brand share — brands hold most of the demand
Review moat
Okay1,691.72avg incumbent reviews — the moat a new listing must climb
Price range
Okay$5.98–$219.51cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+6.2%90-day search growth — must beat 0% to launch
Market size
Okay$144K$144K/yr · 64K searches
According to Flapen's Amazon United States niche tracking, foam filler is a $144K/yr Amazon United States market (64K searches/yr). The top 5 brands hold 75% of demand. Verdict: Worth a look — 57/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
foam filler market data
- Units sold / yr
- 3K–4K
- avg 100–250/product
- Revenue / yr
- $118K–$158K
- units × avg price
- Conversion rate
- 5.7%
- Avg BSR
- #320
- Page quality
- 0%
- Prime
- 85%
- Sponsored
- 72%
- Out of stock
- 1.1%
- Avg brand age
- 52 months
- Avg seller age
- 166 days
Competition & brand share
The top 5 products take 46% of clicks — established leaders, but buyers still shop beyond them.Brands
18 rising
Sellers
174
Top-5 brand share
75%
Top 20: 100%
Top-5 click share
46%
Top 20: 81%
Open market
20%
- Great Stuff37%
- STANLEY13%
- Loctite11%
- GREAT STUFF PRO9%
- KRAKEN BOND5%
- TYTAN PROFESSIONAL5%
Demand & seasonality
Weekly Amazon search volume, last 94 weeks — +6.2% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top foam filler search terms
- foam filler25K/yr
- great stuff window and door spray foam8K/yr
- window and door spray foam10K/yr
- window and door foam7K/yr
- filler foam5K/yr
- great stuff window and door6K/yr
- foam fill3K/yr
Top foam 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 24 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$8.164.5★9,263 rev
Great Stuff 197711 Each Yellow
Great Stuff$25.993.9★45 rev
Stanley F902 Window & Door Foam Sealant (2x12 Oz.) Low Expansion Polyurethane Insulating Spray Foam | Gaps and Cracks Filler for Window & Door Frames Waterproof Sealant with Straw | 12 Oz. 2 Pack
STANLEY$16.724.3★100 rev
Loctite Tite Foam Big Gaps Spray Foam Sealant 12 fl oz Can 1 Pack - Polyurethane Expanding Insulation
Loctite$8.204.4★11,678 rev
Great Stuff PRO Window & Door Complete Kit Low Expansion Expanding Foam Sealant Creates Airtight Seal Around Windows & Doors Includes Great Stuff Foam Gun Cleaner & Gloves
GREAT STUFF PRO$89.354.5★47 rev
Newest
by launch date
Stanley F905 Gaps & Cracks Sealant (2x12 Oz.) Polyurethane Spray Foam Insulation for Window & Door Waterproof Gap Filler Low Expansion Foam for Indoor & Outdoor Use | Straw Use | 12 Oz. 2 Pack
STANLEY$16.41112 rev
Stanley F902 Window & Door Foam Sealant (2x12 Oz.) Low Expansion Polyurethane Insulating Spray Foam | Gaps and Cracks Filler for Window & Door Frames Waterproof Sealant with Straw | 12 Oz. 2 Pack
STANLEY$16.72100 rev
Stanley F902 Window & Door Foam Sealant (1x12 Oz.) Low Expansion Polyurethane Insulating Spray Foam | Gaps and Cracks Filler for Window & Door Frames Waterproof Sealant with Straw | 12 Oz. 1 Pack
STANLEY$10.33100 rev
RAINFLOW Shredded Memory Foam Filling - 6.35oz Bean Bag Filler for Pillow
RAINFLOW$5.98142 rev
Window & Door Extreme Expanding Spray Foam Low Expansion Polyurethane for Gaps and Walls Minimal Expansion Filler 12 oz Straw Foam (1 Pack)
TYTAN PROFESSIONAL$10.61109 rev
Trending
90-day click momentum
Great Stuff Window & Door Gap Filler | Insulating Foam Sealant 12 oz. Yellow (8 Pack)
Great Stuff$74.094.4★
Stanley F902 Window & Door Foam Sealant (1x12 Oz.) Low Expansion Polyurethane Insulating Spray Foam | Gaps and Cracks Filler for Window & Door Frames Waterproof Sealant with Straw | 12 Oz. 1 Pack
STANLEY$10.334.3★
Sprayman Gaps and Cracks Filler Foam - Polyurethane Expanding Foam Sealant for Insulating Doors & Windows Waterproof & Paintable Straw Use - 12oz 2 Pack
SPRAYMAN$15.854.2★
RAINFLOW Shredded Memory Foam Filling - 6.35oz Bean Bag Filler for Pillow
RAINFLOW$5.984.1★
Kraken Bond Gaps & Cracks Expanding Foam Sealant - (2x12oz) High Expansion Polyurethane Spray Foam for Window & Door Straw Use Waterproof High Yield Gap Filler - 2 Pack
KRAKEN BOND$15.964.2★
What buyers say about foam filler
What buyers praise and complain about, mined from review topics.What buyers love
“Works great and performs perfectly”
“Decent stuff”
“As advertised”
“EASY to use”
“Excellent value”
“Expands quickly, seals satisfactory”
“Good color”
“Works great, all cans sprayed perfectly”
“Comfortable”
“Adheres just as it dhould”
What buyers complain about
“Did not spray well”
“Never worked”
“Not Sticky Enough”
“Garbage product”
“Product leaked all over”
“made an absolute mess”
“Too expensive”
“Not easy to use”
“doesn't expand as advertised”
“become broken very easily”
Top return reasons
Common questions
- Is foam filler profitable to sell on Amazon United States?
- The niche generates $144K/yr across 39 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +6.2%. Flapen's verdict: Worth a look (57/100).
- How competitive is the foam filler niche?
- 18 brands and 174 sellers compete. The top 5 products take 46% of clicks and top 5 brands hold 75% of demand.
- What do buyers complain about in foam filler?
- Top complaints mined from reviews: Spray/Flow, Functionality-Overall, Adhesion/Stickiness. The return rate is 0.2%.
- When does demand for foam filler peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the foam filler niche?
- Listings span $5.98–$219.51; the average listing price is $39.38 (sweet spot $15–$100). The average incumbent carries 1,692 reviews — the moat a new listing must climb.