---
title: "Foam Filler — $144K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/foam-filler"
last_updated: "2026-08-07T12:56:28.398Z"
locale: en
meta:
description: "Niche score 57/100 · $144K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 57/100 · $144K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Foam Filler — $144K/yr Amazon US Niche (2026) - Flapen"
---
# **foam filler**
**Worth a look**
Shows low returns (0.2%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 31Growth 33Conversion 64Competition 65Returns 99Price range 40Avg price 95Brand share 50Review moat 48Quality gap 68
**Returns**
**Incredible****0.2%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$39.38**
avg listing price — sweet spot $15–$100
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Competition**
**Good****46%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Good****5.7%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****75%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Okay****1,691.72**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Okay****$5.98–$219.51**
cheapest 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 ~~](https://flapen.com/research/methodology)
## **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.
2K1KSpike '24Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/foam-filler/trend)
## **Top foam filler search terms**
- **foam filler**25K/yr+6.0%4.4% conv. - **great stuff window and door spray foam**8K/yr+39.1%5.1% conv. - **window and door spray foam**10K/yr-20.2%5.5% conv. - **window and door foam**7K/yr+38.8%3.7% conv. - **filler foam**5K/yr+37.8%4.9% conv. - **great stuff window and door**6K/yr-40.9%2.5% conv. - **foam fill**3K/yr+4.2%3.8% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/foam-filler/search-terms)
## **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.
0%4%$6K8%$12K12%$17K16%$23K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Great Stuff 99108824 Smart Dispenser Gaps & Cracks Cream 12 Ounce**Great Stuff**$8.16**4.5★9,263 rev](https://www.amazon.com/dp/B07GLG7B3Z) [2**Great Stuff 197711 Each Yellow**Great Stuff**$25.99**3.9★45 rev](https://www.amazon.com/dp/B000KKPEM4) [3**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**$16.72**4.3★100 rev](https://www.amazon.com/dp/B0FCYCYF5H) [4**Loctite Tite Foam Big Gaps Spray Foam Sealant 12 fl oz Can 1 Pack - Polyurethane Expanding Insulation**Loctite**$8.20**4.4★11,678 rev](https://www.amazon.com/dp/B07Q3WPB6B) [5**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**$89.35**4.5★47 rev](https://www.amazon.com/dp/B0BSR5Y4JT)
**~~View all top sellers →~~**
### **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**$16.41**112 rev1y ago](https://www.amazon.com/dp/B0FDB98H9R) [**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**$16.72**100 rev1y ago](https://www.amazon.com/dp/B0FCYCYF5H) [**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**$10.33**100 rev1y ago](https://www.amazon.com/dp/B0FCYXC8M8) [**RAINFLOW Shredded Memory Foam Filling - 6.35oz Bean Bag Filler for Pillow**RAINFLOW**$5.98**142 rev1y ago](https://www.amazon.com/dp/B0F9SQCL2Q) [**Window & Door Extreme Expanding Spray Foam Low Expansion Polyurethane for Gaps and Walls Minimal Expansion Filler 12 oz Straw Foam (1 Pack)**TYTAN PROFESSIONAL**$10.61**109 rev1y ago](https://www.amazon.com/dp/B0DG63PT3R)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Great Stuff Window & Door Gap Filler | Insulating Foam Sealant 12 oz. Yellow (8 Pack)**Great Stuff**$74.09**4.4★**▲ 282%**](https://www.amazon.com/dp/B071LGTR3P) [**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**$10.33**4.3★**▲ 170%**](https://www.amazon.com/dp/B0FCYXC8M8) [**Sprayman Gaps and Cracks Filler Foam - Polyurethane Expanding Foam Sealant for Insulating Doors & Windows Waterproof & Paintable Straw Use - 12oz 2 Pack**SPRAYMAN**$15.85**4.2★**▲ 154%**](https://www.amazon.com/dp/B0D2Y7DWCC) [**RAINFLOW Shredded Memory Foam Filling - 6.35oz Bean Bag Filler for Pillow**RAINFLOW**$5.98**4.1★**▲ 126%**](https://www.amazon.com/dp/B0F9SQCL2Q) [**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**$15.96**4.2★**▲ 90%**](https://www.amazon.com/dp/B0CKPZC9KL)
**~~View all trending →~~**
## **What buyers say about foam filler**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Efficiency**14%
*“Works great and performs perfectly”*
**Quality-Overall**14%
*“Decent stuff”*
**Advertised Vs Actual Product**12%
*“As advertised”*
**Ease Of Use**9%
*“EASY to use”*
**Value For Money**9%
*“Excellent value”*
**Stretchability/Expandability/Elasticity**4%
*“Expands quickly, seals satisfactory”*
**Color**2%
*“Good color”*
**Spray/Flow**2%
*“Works great, all cans sprayed perfectly”*
**Comfort-Overall**2%
*“Comfortable”*
**Adhesion/Stickiness**2%
*“Adheres just as it dhould”*
### **What buyers complain about **
**Spray/Flow**12%
*“Did not spray well”*
**Functionality-Overall**10%
*“Never worked”*
**Adhesion/Stickiness**8%
*“Not Sticky Enough”*
**Quality-Overall**7%
*“Garbage product”*
**Leak-Proof**6%
*“Product leaked all over”*
**Ease Of Cleaning**6%
*“made an absolute mess”*
**Value For Money**6%
*“Too expensive”*
**Ease Of Use**5%
*“Not easy to use”*
**Stretchability/Expandability/Elasticity**4%
*“doesn't expand as advertised”*
**Durability**3%
*“become broken very easily”*
### **Top return reasons **
**Size-Overall**16%
**Advertised Vs Actual Product**15%
**Stretchability/Expandability/Elasticity**8%
**Functionality-Overall**8%
**Smell**7%
**Value For Money**7%
**Refills-Overall**6%
**Compatibility-Overall**5%
**Material Quality**4%
**Cushion**4%
## **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.
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