---
title: "Fence Post Foam — $116K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/fence-post-foam"
last_updated: "2026-08-10T17:34:07.851Z"
locale: en
meta:
description: "Niche score 51/100 · $116K/yr market · 96K searches/yr · $48.69 avg price. A small market ($116K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · $116K/yr market · 96K searches/yr · $48.69 avg price. A small market ($116K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Fence Post Foam — $116K/yr Amazon US Niche (2026) - Flapen"
---
# **fence post foam**
**Worth a look**
Shows a sweet-spot price point ($48.69 avg), but a small market ($116K/yr) keeps it on the watch list.
Market size 27Growth 61Conversion 31Competition 29Returns 78Price range 32Avg price 94Brand share 33Review moat 83Quality gap 85
**Avg price**
**Great****$48.69**
avg listing price — sweet spot $15–$100
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Great****332.83**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Great****1.9%**
return rate — above 5% kills the launch gate
**Growth**
**Good****+38.4%**
90-day search growth — must beat 0% to launch
**Brand share**
**Okay****85%**
top-5 brand share — brands hold most of the demand
**Price range**
**Okay****$8.51–$271.48**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Okay****2.5%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Okay****67%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Okay****$116K**
$116K/yr · 96K searches
According to Flapen's Amazon United States niche tracking, fence post foam is a $116K/yr Amazon United States market (96K searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Apr–May–Jul. Verdict: Worth a look — 51/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fence post foam market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$146K–$195K**
- units × avg price
- **Conversion rate**
- **2.5%**
- **Avg BSR**
- **#231**
- **Page quality**
- **0%**
- **Prime**
- **89%**
- **Sponsored**
- **61%**
- **Out of stock**
- **8.7%**
- **Avg brand age**
- **52 months**
- **Avg seller age**
- **183 days**
## **Competition & brand share**
The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**10 **—flat
**Sellers**
**65**
**Top-5 brand share**
**85%**
Top 20: 100%
**Top-5 click share**
**67%**
Top 20: 100%
**Open market**
**11%**
- H.B. Fuller33% - KRAKEN BOND19% - STANLEY14% - POSTSAVER14% - Postloc5% - SIKA4% - Open — no brand owns it (4 brands, 11%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +38.4% search growth over the last 90 days.
5K4KSpike '24Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Apr, May, Jul · busiest ÷ quietest = 3.3×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/fence-post-foam/trend)
## **Top fence post foam search terms**
- **sika postfix fence post mix**8K/yr+161.8%1.9% conv. - **fence post foam**14K/yr+34.2%3.2% conv. - **post setting foam**8K/yr+99.2%2.3% conv. - **post foam**9K/yr+61.1%3.2% conv. - **post hole foam**6K/yr+61.7%5.5% conv. - **expanding foam for fence posts**6K/yr+21.5%2.9% conv. - **foam post hole filler**5K/yr+37.1%4.4% conv. - **sika postfix**3K/yr+110.0%1.2% conv. - **fence post foam cement**3K/yr+81.4%5.1% conv. - **sika post fix**6K/yr-29.2%1.1% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/fence-post-foam/search-terms)
## **Top fence post foam 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%10%$12K20%$23K30%$35K40%$46K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**H.B. Fuller Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence 1)**H.B. Fuller**$27.49**4.3★1,757 rev](https://www.amazon.com/dp/B00LAFUC34) [2**Kraken Bond Expanding Foam Post Hole Filler - (1x10.5 + 1x13.2 oz) 2 Part Expanding Polyurethane Concrete Alternative for Fence Deck Mailbox Anchor Waterproof Fence Post Repair Kit 1 Pack**KRAKEN BOND**$22.10**3.9★211 rev](https://www.amazon.com/dp/B09NNWTM2G) [3**Postsaver Pro-Set Fast Fixing Foam | 1 Large Pack = 33.8oz | Install x2 Posts | Quick & Easy Alternative to Concrete | No Water No Mess | for All Fence & Deck Post | Replaces 80-100 lbs Concrete**POSTSAVER**$28.85**4.2★399 rev](https://www.amazon.com/dp/B08PKTY5W7) [4**Stanley F996 Fence Post Mix | Concrete Alternative Expanding Foam | Easy to Use Fast Installation 1x (Component A B) 12.7 fl oz and 10.1 fl oz | Includes Goggles and Gloves 2 Bottle | 1 Pack**STANLEY**$22.60**4.2★112 rev](https://www.amazon.com/dp/B0D42BPTPM) [5**H.B. Fuller Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck Fence Mailbox & Playground Equipment Installs. Fast-Setting Post Foam**H.B. Fuller**$45.92**4.2★438 rev](https://www.amazon.com/dp/B0BDJ7JW3T)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Fast-Setting Fence Post Foam | Expanding Polyurethane Expanding Foam for Fence Posts for Fence Mailbox Deck & Anchor | Waterproof Post Hole Foams Filler | Easy Concrete Alternative Mix**YOTEBLE**$15.08**0 rev2mo ago](https://www.amazon.com/dp/B0GYNK43CC) [**Kraken Bond Expanding Foam Post Hole Filler - (2x10.5 + 2x13.2 oz) 2 Part Expanding Polyurethane Concrete Alternative for Fence Deck Mailbox Anchor Waterproof Fence Post Repair Kit 2 Pack**KRAKEN BOND**$43.27**211 rev1y ago](https://www.amazon.com/dp/B0FGQC43JC) [**Stanley F996 Fence Post Mix | Concrete Alternative Expanding Foam | Easy to Use Fast Installation 1x (Component A B) 12.7 fl oz and 10.1 fl oz | Includes Goggles and Gloves 2 Bottle | 1 Pack**STANLEY**$22.60**112 rev2y ago](https://www.amazon.com/dp/B0D42BPTPM) [**Stanley F996 Fence Post Mix | Concrete Alternative Expanding Foam | Easy to Use Fast Installation 2X (Component A B) 12.7 fl oz and 10.1 fl oz | Includes Goggles and Gloves 2 Bottle | 2 Pack**STANLEY**$44.62**112 rev2y ago](https://www.amazon.com/dp/B0D4293RFX) [**Postloc 1-Post Kit - Easy to Use Concrete Alternative (1)**Postloc**$23.44**97 rev2y ago](https://www.amazon.com/dp/B0CFW2H5LC)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Fast-Setting Fence Post Foam | Expanding Polyurethane Expanding Foam for Fence Posts for Fence Mailbox Deck & Anchor | Waterproof Post Hole Foams Filler | Easy Concrete Alternative Mix**YOTEBLE**$15.08**0.0★**▲ 182%**](https://www.amazon.com/dp/B0GYNK43CC) [**H.B. Fuller Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Post Anchor 4)**H.B. Fuller**$98.82**3.7★**▲ 175%**](https://www.amazon.com/dp/B0FJZD6S9P) [**Sika AnchorFix-1 High Strength Anchoring Adhesive 10.1 fl oz Gray - Fast Setting Self-Mixing Nozzle for Concrete & Masonry Ideal for Railing Rebar Bolts Dowels Subfreezing Temps Use**SIKA**$27.45**4.3★**▲ 127%**](https://www.amazon.com/dp/B000RX89XA) [**Boa Hold Post Anchor Alternative to Concrete | No Water Fast-Setting Anchor for Fence Deck Mailbox Posts | One Bag Kit**Boa Hold**$24.78**4.2★**▲ 118%**](https://www.amazon.com/dp/B0CCYPFPFF) [**H.B. Fuller Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Post Anchor 2)**H.B. Fuller**$51.06**3.7★**▲ 113%**](https://www.amazon.com/dp/B0FJZKXRDY)
**~~View all trending →~~**
## **What buyers say about fence post foam**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**24%
*“Easy to use”*
**Quality-Overall**15%
*“Great product”*
**Advertised Vs Actual Product**13%
*“worked like advertised”*
**Strength**11%
*“Solid product”*
**Efficiency**7%
*“Works beautifully”*
**Functionality-Overall**5%
*“Effective product for limited yse”*
**Maintenance And Repair**4%
*“complete the repair job in one fell swoop”*
**Instructions/User Manual/Troubleshooting**3%
*“The instructions were clear”*
**Material Quality**2%
*“Use real concrete”*
**Durability**2%
*“Easy and Durable”*
### **What buyers complain about **
**Stretchability/Expandability/Elasticity**14%
*“Did not expand very much”*
**Value For Money**13%
*“That cost me 30 bucks”*
**Functionality-Overall**9%
*“Doesnt work”*
**Quality-Overall**8%
*“Junk”*
**Instructions/User Manual/Troubleshooting**8%
*“Instructions are useless”*
**Product Condition**3%
*“Box was open safety glasses were used”*
**Hard Feel**3%
*“After the cement cured. hard as a rock.”*
**Color**3%
*“Would not recommend has black dye”*
**Safety Standards**3%
*“Safety of this product is questionable: Buyer Beware”*
**Material Quality**3%
*“Concrete is way to go”*
### **Top return reasons **
**Functionality-Overall**20%
**Advertised Vs Actual Product**16%
**Value For Money**13%
**Material Quality**12%
**Size-Overall**11%
**Leak-Proof**9%
**Stretchability/Expandability/Elasticity**4%
**Instructions/User Manual/Troubleshooting**3%
**Compatibility-Overall**1%
**Water Resistance**1%
## **Common questions**
- **Is fence post foam profitable to sell on Amazon United States?**
- The niche generates $116K/yr across 18 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +38.4%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the fence post foam niche?**
- 10 brands and 65 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 85% of demand.
- **What do buyers complain about in fence post foam?**
- Top complaints mined from reviews: Stretchability/Expandability/Elasticity, Value For Money, Functionality-Overall. The return rate is 1.9%.
- **When does demand for fence post foam peak?**
- Demand peaks in Apr–May–Jul; the busiest month runs 3.3× the quietest.
- **What does it cost to enter the fence post foam niche?**
- Listings span $8.51–$271.48; the average listing price is $48.69 (sweet spot $15–$100). The average incumbent carries 333 reviews — the moat a new listing must climb.
## **Related niches in Patio, Lawn & Garden**
- 82 [**lawn aerator**](https://flapen.com/research/us/patio-lawn-garden/lawn-aerator)$6.2M/yr+90.1%**Launch it**- 82 [**shepherds hooks for outdoor**](https://flapen.com/research/us/patio-lawn-garden/shepherds-hooks-for-outdoor)$3.9M/yr+141.2%**Launch it**- 82 [**garden mesh**](https://flapen.com/research/us/patio-lawn-garden/garden-mesh)$716K/yr+152.7%**Worth a look**- 83 [**chicken waterer**](https://flapen.com/research/us/patio-lawn-garden/chicken-waterer)$3.4M/yr+70.1%**Launch it**- 83 [**75 foot garden hose**](https://flapen.com/research/us/patio-lawn-garden/75-foot-garden-hose)$1.8M/yr+117.6%**Launch it**- 83 [**bird deterrents for outside**](https://flapen.com/research/us/patio-lawn-garden/bird-deterrents-for-outside)$2.1M/yr+131.5%**Launch it**[**All Patio, Lawn & Garden niches **](https://flapen.com/research/us/patio-lawn-garden)