Fix it without
pulling it apart.
Professional-strength chemical solutions that repair blown head gaskets, stop oil leaks and clear overheating cooling systems. Used by home mechanics, workshops and farmers Australia-wide, and backed by Peter's 100% satisfaction guarantee.
What are you fixing?
Tell us the system and the symptom, and we'll name the product.
Or a common fix
Free expert help with every order.
Peter Maher formulates every product we sell, and gives free expert help choosing or using any of them.
✓ 100% satisfaction guarantee
Peter is a member of, and writes for, the Institute of Automotive Mechanical Engineers.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
What we fix
Every product here fixes a mechanical fault that would normally mean pulling something apart. Find the problem you've got, and the product that solves it.
Overheating and coolant
An engine that runs hot or boils over doesn't always need a new radiator. 115 Super Waterless Coolant is waterless, protects from −56°C to 190°C and puts no pressure on the cooling system, which suits vintage, classic and performance engines; there's a motorcycle version for dirt bikes. 600 Vintage Soluble Oil Coolant doubles the heat transfer of glycol coolant in veteran and vintage cars. For everyday cars, 4WDs and trucks there are green, red, blue and pink concentrates, 109++ for G12 vehicles, 107 for heavy-duty diesels and 500, a ready-to-use premix.
All Coolants & AntifreezeLeaks and blown head gaskets
A blown head gasket usually means taking the head off. 245 Blown Head Gasket Repair seals it through the cooling system instead, and also repairs cracked and warped heads, leaking heater cores and Welsh plugs. The 246 Head Gasket Test Kit confirms the diagnosis first. 230 Stop Oil Leak Seal Expander rejuvenates dried, hardened seals to stop oil leaks, such as a rear main seal weeping onto the driveway, with a success rate above 95%. 235 does the same for hydraulic rams and pumps, 229 for diesel fuel pumps, and 243 Radiator Stop Leak Kit seals small radiator and heater leaks in thirty minutes of running.
All Stop Leak & RepairBrake fluid, from vintage to the track
120 DOT 4 and 123 DOT 3 are full synthetic, non-petroleum fluids for everyday vehicles. 126 Silicone DOT 5 Brake Fluid lasts up to ten years, won't damage paintwork and suits vintage, classic and collector cars that sit between drives. 318 Racing Brake Fluid boils at 318°C, so you can brake harder and later into the corner without fade.
All Brake FluidsDiesel bug, dirty injectors and lost power
Bacteria, fungi and yeast grow in the water that collects in diesel tanks, plugging fuel filters and corroding the tank. The 205 Microbial Field Test Kit shows whether your fuel is contaminated, 201 Diesel Fuel Biocide kills the growth in anything from a 50 litre vehicle tank to 50,000 litres of bulk storage, and 206 does the same for hydraulic oil. 218 Diesel Purge & Restore cleans injectors, rings and combustion chambers, and 207 Diesel Cetane Booster raises the cetane index by 4–8 points to bring back pulling power.
All Diesel & IndustrialNoisy lifters, sludge and shudder
224 Lifter-Free Oil Additive stops lifter clacking by dissolving varnish and carbon deposits. 219 Engine Flushing Additive dissolves engine oil sludge without solvents, so it won't harm seals. 236 Anti-Shudder Additive stops torque converter shudder and harsh gear changes in most automatic transmissions, and 237 ZDDP Oil Additive puts back the ZDDP that engines built before 1996 were designed for.
All Engine & TransmissionScale, oily cooling systems and rust
Over the years scale builds up in the radiator and water jacket and insulates the engine from its coolant: a millimetre of it can cut heat transfer by up to 30%. 239 Cooling System Cleaning Kit dissolves it without taking anything apart. After a head gasket or oil cooler failure, 238 Cooling System Sludge Remover removes the oil sludge left in the radiator and heater. 240 Organic Rust Remover takes rust off completely without damaging the original part.
All Cleaning & RestorationForty years of formulation
in every can.
Every product we sell is my own formulation. When you call, you talk to the person who made it, not a call centre.
Call while you're choosing, mid-job, or any time you want a hand. Every product is formulated and made in Australia, and sent Australia-wide from our warehouse in Minchinbury, NSW.
Peter MaherFounder, Liquid Intelligence
Tell us what it's doing.
We'll tell you what fixes it.
Free expert help, from the person who formulated every product we sell.