---
title: "fence post foam — Niche Verdict: Skip it (43/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/patio-lawn-garden/fence-post-foam"
last_updated: "2026-07-10T01:44:52.314Z"
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meta:
  description: "a small market ($116K/yr) — fence post foam doesn't clear our bar today."
  "og:description": "a small market ($116K/yr) — fence post foam doesn't clear our bar today."
  "og:title": "fence post foam — Niche Verdict: Skip it (43/100) | Amazon United States - Flapen"
---

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# **fence post foam**

**Skip it****43/100 **

a small market ($116K/yr) — fence post foam doesn't clear our bar today.

**Market/yr**

**$116K**

**Growth (1y)**

**+89.8%**

**Products**

**18**

**Brands**

**10**

was 10 a year ago

**Sellers**

**65**

**Price range**

**$8.51–$271.48**

**Returns**

**1.9%**

**Rating**

**4.2★**

**Skip it**

Scored 43/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns

Market size

**6**

 ×0.30

Growth

**62**

 ×0.30

Competition

**34**

 ×0.20

Quality gap

**74**

 ×0.10

Returns

**85**

 ×0.10

## **Demand**

Weekly Amazon search volume, last 104 weeks — +89.8% year over year.

5K2KSpike '24Spike '25Black Friday '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

## **Seasonality**

Monthly demand index across the year — 1.00 is average.

JFMAMJJASOND

Peak months: Apr, May, Jul · busiest ÷ quietest = 3.3×

## **Competition**

- H.B. Fuller33% - KRAKEN BOND19% - STANLEY14% - POSTSAVER14% - Postloc5% - SIKA4% - Other (4 brands)11%

The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them. 10 brands and 65 sellers compete here.

**Brands**

**10 **—flat

was 10 a year ago

**Sellers**

**65**

**Top 5 brand share**

**85%**

#ProductBrandPriceRatingReviewsClick shareTrend

1
![H.B. Fuller Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence 1)](https://m.media-amazon.com/images/I/41S0b3GtQZL.jpg) [**H.B. Fuller Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence 1)**](https://www.amazon.com/dp/B00LAFUC34)

H.B. Fuller$27.494.3★1,75721%▼falling

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](https://m.media-amazon.com/images/I/415A+BketKL.jpg) [**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**](https://www.amazon.com/dp/B09NNWTM2G)

KRAKEN BOND$22.103.9★21117%▲rising

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](https://m.media-amazon.com/images/I/41zTFVvTzvL.jpg) [**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**](https://www.amazon.com/dp/B08PKTY5W7)

POSTSAVER$28.854.2★39912%▼falling

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](https://m.media-amazon.com/images/I/41wC0fyuG1L.jpg) [**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**](https://www.amazon.com/dp/B0D42BPTPM)

STANLEY$22.604.2★11210%▲rising

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](https://m.media-amazon.com/images/I/41D0uvFt8dL.jpg) [**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**](https://www.amazon.com/dp/B0BDJ7JW3T)

H.B. Fuller$45.924.2★4387%▲rising

6
![Postloc 1-Post Kit - Easy to Use Concrete Alternative (1)](https://m.media-amazon.com/images/I/416CEoqM5GL.jpg) [**Postloc 1-Post Kit - Easy to Use Concrete Alternative (1)**](https://www.amazon.com/dp/B0CFW2H5LC)

Postloc$23.444.3★975%▲rising

7
![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](https://m.media-amazon.com/images/I/41LFH-8BmJL.jpg) [**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**](https://www.amazon.com/dp/B0D4293RFX)

STANLEY$44.624.2★1124%▼falling

8
![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](https://m.media-amazon.com/images/I/51Nm3WiQegL.jpg) [**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**](https://www.amazon.com/dp/B0GYNK43CC)

YOTEBLE$15.080.0★03%▲rising

9
![HARTLINE 10001 Rockite Expansion Cement 15 Min 1 Lb](https://m.media-amazon.com/images/I/51d5D1la-qL.jpg) [**HARTLINE 10001 Rockite Expansion Cement 15 Min 1 Lb**](https://www.amazon.com/dp/B000VBRB00)

Hartline Prod CO$8.514.3★9923%▼falling

10

![Sika Postfix - Fence Post Mix - Light Green - Mix-in-the-Bag Expanding Foam for Supporting Non-Structural Posts - 978 ml](https://m.media-amazon.com/images/I/41jchwuFHCL.jpg) [**Sika Postfix - Fence Post Mix - Light Green - Mix-in-the-Bag Expanding Foam for Supporting Non-Structural Posts - 978 ml**](https://www.amazon.com/dp/B01N1Q5YNE)

SIKA$22.084.4★4673%▼falling

11

![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](https://m.media-amazon.com/images/I/51YMv5Yj-ML.jpg) [**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**](https://www.amazon.com/dp/B0FGQC43JC)

KRAKEN BOND$43.273.9★2112%▲rising

12

![Postsaver Pro-Set Fast Fixing Foam | Quick & Easy Alternative to Concrete | Fence & Deck Post Foam | for All Types of Posts | 1 Pack = 33.8oz | Replaces 80-100 lbs Concrete (10)](https://m.media-amazon.com/images/I/31PICiqa1bL.jpg) [**Postsaver Pro-Set Fast Fixing Foam | Quick & Easy Alternative to Concrete | Fence & Deck Post Foam | for All Types of Posts | 1 Pack = 33.8oz | Replaces 80-100 lbs Concrete (10)**](https://www.amazon.com/dp/B08WLXPWWV)

POSTSAVER$271.484.2★3992%▲rising

13

![Fiberglass Supply Depot 6 Lb. Density Expanding Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam for Boats Dock Flotation Carving Soundproofing Filling Voids and Insulation (1 Gallon Kit)](https://m.media-amazon.com/images/I/41p1bPHNrtL.jpg) [**Fiberglass Supply Depot 6 Lb. Density Expanding Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam for Boats Dock Flotation Carving Soundproofing Filling Voids and Insulation (1 Gallon Kit)**](https://www.amazon.com/dp/B0BBH4XQ9P)

Fiberglass Supply Depot$75.604.4★1902%▼falling

14

![Boa Hold Post Anchor Alternative to Concrete | No Water Fast-Setting Anchor for Fence Deck Mailbox Posts | One Bag Kit](https://m.media-amazon.com/images/I/61nXMsWCy7L.jpg) [**Boa Hold Post Anchor Alternative to Concrete | No Water Fast-Setting Anchor for Fence Deck Mailbox Posts | One Bag Kit**](https://www.amazon.com/dp/B0CCYPFPFF)

Boa Hold$24.784.2★522%▲rising

15

![Fast 2K Deck Post Mix | Expanding Foam Concrete Alternative for Deck Post Fence Post Mailbox & Playground Equipment Installs. Fast-Setting Post Foam](https://m.media-amazon.com/images/I/51PHyJ7Xr2L.jpg) [**Fast 2K Deck Post Mix | Expanding Foam Concrete Alternative for Deck Post Fence Post Mailbox & Playground Equipment Installs. Fast-Setting Post Foam**](https://www.amazon.com/dp/B08LMS1VNK)

H.B. Fuller$23.234.2★4382%▼falling

**~~Showing 15 of 18 — show all ~~**

## **Product shelf**

All 18 tracked products in this niche.

Top sellersNewestTrending

[![H.B. Fuller Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence 1)](https://m.media-amazon.com/images/I/41S0b3GtQZL.jpg)**H.B. Fuller Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence 1)** H.B. Fuller**$27.49**4.3★1,757 reviews](https://www.amazon.com/dp/B00LAFUC34) [![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](https://m.media-amazon.com/images/I/415A+BketKL.jpg)**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 reviews](https://www.amazon.com/dp/B09NNWTM2G) [![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](https://m.media-amazon.com/images/I/41zTFVvTzvL.jpg)**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 reviews](https://www.amazon.com/dp/B08PKTY5W7) [![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](https://m.media-amazon.com/images/I/41wC0fyuG1L.jpg)**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 reviews](https://www.amazon.com/dp/B0D42BPTPM) [![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](https://m.media-amazon.com/images/I/41D0uvFt8dL.jpg)**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 reviews](https://www.amazon.com/dp/B0BDJ7JW3T) [![Postloc 1-Post Kit - Easy to Use Concrete Alternative (1)](https://m.media-amazon.com/images/I/416CEoqM5GL.jpg)**Postloc 1-Post Kit - Easy to Use Concrete Alternative (1)** Postloc**$23.44**4.3★97 reviews](https://www.amazon.com/dp/B0CFW2H5LC) [![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](https://m.media-amazon.com/images/I/41LFH-8BmJL.jpg)**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**4.2★112 reviews](https://www.amazon.com/dp/B0D4293RFX) [![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](https://m.media-amazon.com/images/I/51Nm3WiQegL.jpg)**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★0 reviews](https://www.amazon.com/dp/B0GYNK43CC)

## **Reviews**

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-Overall20% - Advertised Vs Actual Product16% - Value For Money13% - Material Quality12% - Size-Overall11% - Leak-Proof9% - Stretchability/Expandability/Elasticity4% - Instructions/User Manual/Troubleshooting3% - Compatibility-Overall1% - Water Resistance1%