coolant additive
Skip it36/100a concentrated shelf (top 5 take 87% of clicks) — coolant additive doesn't clear our bar today.
Market/yr
$161K
Growth (1y)
+110.6%
Products
9
Brands
4
was 4 a year ago
Sellers
90
Price range
$7.45–$50.55
Returns
0.5%
Rating
4.6★
Skip it
Scored 36/100 across market size, growth, competition, quality gap, and returns.
Demand
Weekly Amazon search volume, last 83 weeks — +110.6% year over year.Seasonality
Monthly demand index across the year — 1.00 is average.Peak months: May, Jun, Jul · busiest ÷ quietest = 2.9×
Competition
- Red Line75%
- Royal Purple14%
- Hy-Per Lube7%
- Design Engineering5%
The top 5 products capture 87% of clicks — a locked-up shelf that new listings rarely crack. 4 brands and 90 sellers compete here.
Brands
4 flat
was 4 a year ago
Sellers
90
Top 5 brand share
100%
Product shelf
All 9 tracked products in this niche.
Red Line 80204 WaterWetter Super Coolant - 12 Ounce
Red Line
$13.604.6★3,224 reviews
Red Line 80204 WaterWetter Super Coolant - 12 Ounce (2 Pack)
Red Line
$28.914.8★534 reviews
Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz.
Royal Purple
$13.304.5★1,904 reviews
Red Line 80205 Supercool Extreme Powersports Coolant Fortified with WaterWetter - 1/2 Gallon
Red Line
$26.164.7★404 reviews
DEI Radiator Relief Coolant Additive Reduces Engine Temps Up to 30F 16 oz
Design Engineering
$10.464.3★233 reviews
Hy-Per Lube HPC100-3PK High Performance Super Coolant - 16 oz (Pack of 3)
Hy-Per Lube
$22.524.6★1,177 reviews
Red Line 80204 WaterWetter Super Coolant - 12 Ounce (4 Pack)
Red Line
$50.554.6★90 reviews
Rislone Hy-per Cool Super Coolant 16 oz.
Hy-Per Lube
$7.454.6★1,177 reviews
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Really helps keep coolant temps consistent on a turbo LS”
“Works well”
“Quality product”
“Cheaper on Amazon than your local parts store”
“Works as advertised”
“Great no rust”
“Id definitely buy it again especially in extreme heat”
“Simple to use”
“Works”
“matches the Prestone green colored coolent”
What buyers complain about
“Did not work”
“Coolant temps came down noticeably”
“Its a bit more expensive than standard options”
“Arrives leaking”
“Definitely DO NOT want something so slick & greasy in my cooling system on the track, it's just too dangerous for me and other racers”
“useless scamm”
“They don't hold”
“I noticed the temperature gauge actually goes a bit more than half way up when pulling a long hill”
“at least it changed the color of my antifreeze”
“Dropped my coolant temps by 20° on dyno”
Top return reasons
- Coolant43%
- Leak-Proof33%
- Functionality-Overall6%
- Advertised Vs Actual Product3%
- Compatibility-Overall3%
- Ease Of Use3%
- Value For Money3%
- Defective Material/Parts2%
- Adhesion/Stickiness2%
- Heating1%