caustic soda
Worth a lookShows low returns (0.1%), but a concentrated shelf (top 5 take 83% of clicks) keeps it on the watch list.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Conversion
Incredible13.9%search→purchase rate — share of searches ending in a sale
Review moat
Great330.42avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Price range
Good£3.35–£34.26cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good£366K£366K/yr · 229K searches
Avg price
Okay£11.47avg listing price — sweet spot $15–$100
Brand share
Okay90%top-5 brand share — brands hold most of the demand
Growth
Bad-4.8%90-day search growth — must beat 0% to launch
Competition
Bad83%top-5 click share — a locked-up shelf
According to Flapen's Amazon United Kingdom niche tracking, caustic soda is a £366K/yr Amazon United Kingdom market (229K searches/yr). The top 5 brands hold 90% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
caustic soda market data
- Units sold / yr
- 30K–40K
- avg 2,000–2,500/product
- Revenue / yr
- £344K–£459K
- units × avg price
- Conversion rate
- 13.9%
- Avg BSR
- #94
- Page quality
- 0%
- Prime
- 67%
- Sponsored
- 83%
- Out of stock
- 1.0%
- Avg brand age
- 38 months
- Avg seller age
- 168 days
Competition & brand share
The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.Brands
9 rising
Sellers
24
Top-5 brand share
90%
Top 20: 100%
Top-5 click share
83%
Top 20: 100%
Open market
7%
- Max34%
- EasyClean26%
- Epished17%
- The Retail Heaven10%
- Thomas Bewick3%
- MUSON TRADE3%
- Open — no brand owns it (3 brands, 7%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -4.8% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top caustic soda search terms
- caustic soda140K/yr
- caustic soda drain unblocker51K/yr
- caustic soda max strength11K/yr
- caustic soda crystals12K/yr
- caustic soda powder7K/yr
- costick soda drain cleaner6K/yr
- costick soda3K/yr
Top caustic soda 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 12 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Powerful Caustic Soda Drain Cleaner | Effective Clog Remover Industrial Strength Formula Fast Action (3 X 375gm) (Packaging may vary)
EasyClean£8.884.3★632 rev
Max Strength Caustic Soda High Performance Caustic Soda Drain Unblocker and Degreaser Powerful Sodium Hydroxide for Bins Toilets Drains Concrete Paths and More 1kg - Made in the UK
Max£7.134.5★313 rev
Powerful Drain Cleaner & Unblocker 1KG Caustic Soda Crystals | Heavy Duty Sink & Pipe Unblocker for Grease Hair & Organic Waste | Fast-Acting Professional Strength Formula
Epished£6.144.5★82 rev
Powerful Drain Cleaner & Unblocker l 1KG Caustic Soda | Fast-Acting Heavy-Duty Sink & Drain Cleaner | Strong & Effective | The Original & Best l Works 3x Better Than Bleach (Packaging Varies)
The Retail Heaven£7.544.3★1,704 rev
Max Strength Caustic Soda High Performance Caustic Soda Drain Unblocker and Degreaser Powerful Sodium Hydroxide for Bins Toilets Drains Concrete Paths and More 500g - Made in the UK
Max£4.884.4★156 rev
Newest
by launch datePowerful Drain Cleaner & Unblocker 1KG Caustic Soda Crystals | Heavy Duty Sink & Pipe Unblocker for Grease Hair & Organic Waste | Fast-Acting Professional Strength Formula
Epished£6.1482 rev
5 Kg Drain Unblocker | Caustic Soda | Professional Grade Drain Cleaner Commercial Kitchen Degreaser Soap & Chemical Manufacturing Textile & Water Treatment Use | 5Kg
Thomas Bewick£34.2639 rev
Max Strength Caustic Soda High Performance Caustic Soda Drain Unblocker and Degreaser Powerful Sodium Hydroxide for Bins Toilets Drains Concrete Paths and More 1kg - Made in the UK
Max£7.13313 rev
Max Strength Caustic Soda High Performance Caustic Soda Drain Unblocker and Degreaser Powerful Sodium Hydroxide for Bins Toilets Drains Concrete Paths and More 500g - Made in the UK
Max£4.88156 rev
Max Traditional Soda Crystals 450g - Remove Stubborn Grease and Stains - Powerful Multipurpose Dishwasher Washing Machine Cleaner - Fast Acting Soda Crystals with Lasting Results
Max£3.35204 rev
Trending
90-day click momentum
MUSON Caustic Soda 5KG | Professional Drain Unblocker & Grease Remover | Sodium Hydroxide 98% | Heavy Duty Sink & Pipe Cleaner
MUSON TRADE£30.244.2★
Powerful Drain Cleaner & Unblocker 1KG Caustic Soda Crystals | Heavy Duty Sink & Pipe Unblocker for Grease Hair & Organic Waste | Fast-Acting Professional Strength Formula
Epished£6.144.5★
Max Strength Caustic Soda High Performance Caustic Soda Drain Unblocker and Degreaser Powerful Sodium Hydroxide for Bins Toilets Drains Concrete Paths and More 500g - Made in the UK
Max£4.884.4★
Sodium Hydroxide Caustic soda powder Lye for soap making Sink unblocker the best drain cleaners and unblockers Strongest toilet unblocker kitchen sink unblocker drain cleaner sink cleaner 1KG
Spartax£11.164.7★
Max Strength Caustic Soda High Performance Caustic Soda Drain Unblocker and Degreaser Powerful Sodium Hydroxide for Bins Toilets Drains Concrete Paths and More 1kg - Made in the UK
Max£7.134.5★
What buyers say about caustic soda
What buyers praise and complain about, mined from review topics.What buyers love
“Good brand use for washing powder”
“Great Value”
“As advertised”
“Very strong”
“Easy to Use”
“cleaning etc handy to have”
“The item does do what it says”
“Does the job where other solutions don't”
“washing up liquid does a better job”
“the safety instructions are clear”
What buyers complain about
“Did not work for”
“Not Strong Enough”
“not cheaper though”
“Does nothing followed instructions and just nothing”
“it doesnt dissolve”
“Did absolutely nothing did not behave like caustic soda at all”
“the caustic soda spilled out onto the floor”
“Didn't clear”
“Today I used it on a small stainless teapot that was stubbornly stained”
“the drain was still clogged”
Top return reasons
Common questions
- Is caustic soda profitable to sell on Amazon United Kingdom?
- The niche generates £366K/yr across 12 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -4.8%. Flapen's verdict: Worth a look (51/100).
- How competitive is the caustic soda niche?
- 9 brands and 24 sellers compete. The top 5 products take 83% of clicks and top 5 brands hold 90% of demand.
- What do buyers complain about in caustic soda?
- Top complaints mined from reviews: Functionality-Overall, Strength, Value For Money. The return rate is 0.1%.
- When does demand for caustic soda peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the caustic soda niche?
- Listings span £3.35–£34.26; the average listing price is £11.47 (sweet spot $15–$100). The average incumbent carries 330 reviews — the moat a new listing must climb.