Fix it in the driveway.
Not the workshop.
Professional-strength chemical solutions that repair blown head gaskets, stop oil leaks and clear overheating cooling systems, without dismantling a thing.
What are you fixing?
Tell us the system and the symptom, and we'll name the product.
Or a common fix
Shop by category
Coolants & Antifreeze
Engineered coolants for every vehicle: modern, diesel, vintage and race.
Stop Leak & Repair
Fix leaks and blown head gaskets without dismantling the engine.
Brake Fluids
Full synthetic, silicone and racing brake fluids for every application.
Diesel & Industrial
Biocides, boosters and treatments for diesel fuel and hydraulic systems.
Engine & Transmission
Targeted additives that restore performance without a workshop visit.
Cleaning & Restoration
Cooling system cleaners and rust removal that work back to new.
Best sellers
Blown Head Gasket Repair
Repairs blown head gaskets without dismantling the engine. Results in minutes.
from$111
Stop Oil Leak Seal Expander
Rejuvenates dried, hardened seals to stop oil leaks, success rate greater than 95%.
from$143
Super Waterless Coolant
Protection from −56°C to 190°C. Perfect for vintage, classic and performance vehicles.
from$113
Cooling System Cleaning Kit
Restores your entire cooling system's efficiency back to new.
from$180
Radiator Stop Leak Kit
The strongest and safest radiator fix on the market today.
$96
We'll tell you
when it won't work.
A seal that is cracked, ripped or torn is a mechanical failure, and no additive will fix it. We say so on the phone rather than sell you a can. Forty years of formulation sits behind that answer, and you get it from the person who made the product, not a call centre.
Peter MaherFounder, Liquid Intelligence
Tell us what it's doing.
We'll tell you what fixes it.
No charge, no sales pitch, and if none of our products will solve it, we'll tell you what the solution is.