---
title: "Kilz Mold and Mildew Primer — $408K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/kilz-mold-and-mildew-primer"
last_updated: "2026-08-09T07:14:12.571Z"
locale: en
meta:
description: "Niche score 51/100 · $408K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · $408K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Kilz Mold and Mildew Primer — $408K/yr Amazon US Niche (2026) - Flapen"
---
# **kilz mold and mildew primer**
**Worth a look**
Shows a sweet-spot price point ($29.28 avg), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Market size 56Growth 38Conversion 56Competition 24Returns 90Price range 90Avg price 95Brand share 0Review moat 35Quality gap 78
**Avg price**
**Incredible****$29.28**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.2%**
return rate — above 5% kills the launch gate
**Price range**
**Great****$9.87–$98.01**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Market size**
**Good****$408K**
$408K/yr · 293K searches
**Conversion**
**Good****4.8%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Okay****+10.7%**
90-day search growth — must beat 0% to launch
**Review moat**
**Okay****2,997.2**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****71%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, kilz mold and mildew primer is a $408K/yr Amazon United States market (293K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Oct. Verdict: Worth a look — 51/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **kilz mold and mildew primer market data**
- **Units sold / yr**
- **20K–25K**
- avg 1,500–2,000/product
- **Revenue / yr**
- **$586K–$732K**
- units × avg price
- **Conversion rate**
- **4.8%**
- **Avg BSR**
- **#56**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **80%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **71 months**
- **Avg seller age**
- **157 days**
## **Competition & brand share**
The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**5 **▲rising
**Sellers**
**107**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**71%**
Top 20: 100%
**Open market**
**0%**
- Zinsser75% - KILZ17% - Masterchem Industries4% - Concrobium3% - RMR Brands2%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +10.7% search growth over the last 90 days.
9K7KSpike '24Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Oct · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/kilz-mold-and-mildew-primer/trend)
## **Top kilz mold and mildew primer search terms**
- **kilz mold and mildew primer**80K/yr+30.8%5.1% conv. - **zinsser mold killing primer**36K/yr+17.8%6.6% conv. - **mold killing primer**23K/yr+30.5%6.8% conv. - **killzall paint for mold**23K/yr-6.3%5.4% conv. - **mold paint**19K/yr+9.0%5.8% conv. - **kills paint**14K/yr+16.7%3.8% conv. - **mold resistant paint**10K/yr-8.2%4.6% conv. - **mold paint killer**8K/yr+30.8%5.8% conv. - **mold killing paint**10K/yr-14.0%6.9% conv. - **mold killer paint**7K/yr+31.5%6.0% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/kilz-mold-and-mildew-primer/search-terms)
## **Top kilz mold and mildew primer 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%$41K20%$82K30%$122K40%$163K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 15 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**qt Zinsser 276087 White Mold Killing Primer Water-Based Mold Killing Primer**Zinsser**$16.78**4.5★4,434 rev](https://www.amazon.com/dp/B00K7FEQPI) [2**Zinsser 02774 PERMA-WHITE Mold & Mildew Proof Interior Paint Quart Eggshell White**Zinsser**$15.51**4.5★1,638 rev](https://www.amazon.com/dp/B000LNYBOW) [3**qt Zinsser 276087 White Zinsser Mold Killing Primer Water-Based Mold Killing Primer (Pack of 3)**Zinsser**$54.55**4.5★4,434 rev](https://www.amazon.com/dp/B01GABN7ZW) [4**1 Quart Bulls Eye 1-2-3 Primer Sealer Stain Killer**Zinsser**$11.06**4.6★3,640 rev](https://www.amazon.com/dp/B000H5VKBQ) [5**Rust-Oleum Zinsser 287512 Molding Blocking Spray Primer 13 oz White**Zinsser**$12.86**4.5★4,434 rev](https://www.amazon.com/dp/B08TT9XWP5)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Zinsser Mold Blocking Spray Primer Interior & Exterior White 6-Pack**Zinsser**$49.03**4,434 rev5y ago](https://www.amazon.com/dp/B08TTJBRHN) [**Rust-Oleum Zinsser 287512 Molding Blocking Spray Primer 13 oz White**Zinsser**$12.86**4,434 rev5y ago](https://www.amazon.com/dp/B08TT9XWP5) [**Mold & Mildew Primer Sealer & Stain Blocker Interior & Exterior 1-Qt.**KILZ**$98.01**1 rev6y ago](https://www.amazon.com/dp/B08DRW8LC3) [**Concrobium Mold Control 32 oz Spray Eliminates & Prevents Mold EPA-Registered Bleach-Free Odorless VOC-Free**Concrobium**$13.35**2,239 rev6y ago](https://www.amazon.com/dp/B084CNTQX2) [**RMR Brands DIY Mold & Stain Remover Bundle Complete Mold Killer & Mildew Prevention Kit Disinfectant Spray Includes 2-32 fluid ounce Bottles**RMR Brands**$23.77**10,120 rev9y ago](https://www.amazon.com/dp/B0722K3KKL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Zinsser Mold Blocking Spray Primer Interior & Exterior White 6-Pack**Zinsser**$49.03**4.5★**▲ 181%**](https://www.amazon.com/dp/B08TTJBRHN) [**Masterchem Industries 10007 KILZ Up Shot Sealer 10 oz.**KILZ**$16.87**4.6★**▲ 112%**](https://www.amazon.com/dp/B000LNP538) [**qt Zinsser 276087 White Zinsser Mold Killing Primer Water-Based Mold Killing Primer (Pack of 3)**Zinsser**$54.55**4.5★**▲ 73%**](https://www.amazon.com/dp/B01GABN7ZW) [**1 Quart Bulls Eye 1-2-3 Primer Sealer Stain Killer**Zinsser**$11.06**4.6★**▲ 69%**](https://www.amazon.com/dp/B000H5VKBQ) [**KILZ Stainblocking Ceiling Paint Interior White 1 Gallon**KILZ**$43.80**4.5★**▲ 46%**](https://www.amazon.com/dp/B00B2G97IW)
**~~View all trending →~~**
## **What buyers say about kilz mold and mildew primer**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**13%
*“overall a quality buy just for the mold remover”*
**Efficiency**13%
*“Effective”*
**Ease Of Cleaning**12%
*“Doesnt leave a mess”*
**Advertised Vs Actual Product**9%
*“As advertised”*
**Paint Quality**6%
*“Its good paint”*
**Coverage**5%
*“Covers well”*
**Smell**5%
*“made everything smell clean”*
**Value For Money**5%
*“Well worth it”*
**Ease Of Use**5%
*“Easy to use”*
**Spray/Flow**3%
*“easy to spray”*
### **What buyers complain about **
**Functionality-Overall**21%
*“Did not work”*
**Smell**10%
*“doesn't smell”*
**Leak-Proof**8%
*“Arrived leaking everywhere”*
**Paint Quality**8%
*“in spite of the paint”*
**Ease Of Cleaning**4%
*“It took us about an hour to completely clean”*
**Spray/Flow**4%
*“Spray Bottle Did Not Work”*
**Stain Resistance**3%
*“Some of the stains were really bad”*
**Ease Of Use**2%
*“I cannot use it”*
**Color**2%
*“on each picture the white area you see was as dark as the spots I missed”*
**Value For Money**2%
*“And the replacement cost of the gasket installed was outrageous”*
### **Top return reasons **
**Leak-Proof**27%
**Paint Quality**16%
**Functionality-Overall**15%
**Size-Overall**7%
**Advertised Vs Actual Product**7%
**Value For Money**6%
**Spray/Flow**5%
**Smell**3%
**Color**2%
**Defective Material/Parts**2%
## **Common questions**
- **Is kilz mold and mildew primer profitable to sell on Amazon United States?**
- The niche generates $408K/yr across 15 tracked products. 90-day search growth is +10.7%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the kilz mold and mildew primer niche?**
- 5 brands and 107 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in kilz mold and mildew primer?**
- Top complaints mined from reviews: Functionality-Overall, Smell, Leak-Proof. The return rate is 1.2%.
- **When does demand for kilz mold and mildew primer peak?**
- Demand peaks in Oct; the busiest month runs 1.6× the quietest.
- **What does it cost to enter the kilz mold and mildew primer niche?**
- Listings span $9.87–$98.01; the average listing price is $29.28 (sweet spot $15–$100). The average incumbent carries 2,997 reviews — the moat a new listing must climb.
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