

MAG 1 Cooling System Stop Leak
MAG1
This product is not available for purchase online.
Features
Overview
MAG 1 Cooling System Stop Leak is a concentrated additive that seals leaks in radiators, hoses, gaskets, and heater cores without clogging the system. Poured directly into the cooling reservoir, it forms a durable seal to prevent coolant loss, restoring pressure and efficiency—reliable gear that patches up overheating woes without a full flush or tow.
Why You’ll Love It
- Quickly plugs small leaks to stop coolant drips and top-ups
- Safe for all coolant types, including extended-life formulas
- One-bottle treatment works on cars, trucks, and heavy machinery
Built for Real Work
Formulated with premium sealants that swell and repair without residue or blockages, this additive handles high-heat and pressure like a pro. It's tough on pinholes and cracks but gentle on pumps and sensors—proper kit for the tradie's overheating ute mid-job, straightforward enough for the driveway fix, just pour in, run the engine, and watch it hold.
Perfect For
- Tradies keeping fleet vehicles running on remote sites
- DIYers patching radiator issues before bigger repairs
Recommended Products

Nulon Red General Purpose Coolant Premix 1L
Overview Nulon Red General Purpose Coolant Premix 1L is a ready-to-use, multi-purpose anti-freeze and anti-boil formula that protects cooling systems in a wide range of vehicles. Pre-mixed with demineralised water, it offers full corrosion inhibition and reliable performance for up to 4 years or 200,000km—straightforward gear that keeps engines cool and efficient without mixing hassles. Why You’ll Love It Ready-to-pour design saves time on top-ups or full flushes Advanced inhibitors shield all metals from rust and scale buildup Compatible with most Aussie and Kiwi vehicles for versatile use Built for Real Work Formulated with long-life inhibitors for maximum protection against corrosion in radiators, water pumps, and hoses, this red premix handles high temps and pressures without foaming or gelling. It's tough enough for the tradie's ute on dusty runs, straightforward enough for the home mechanic's quick service—proper coolant that defaults to your system's life as a top-up, no drama, just pour and protect. Perfect For Tradies topping up or servicing fleet vehicles and machinery DIYers maintaining cars, utes, or older models for reliable cooling

LA-CO 170g Silver Brazing Flux Paste
Overview The LA-CO 170g Silver Brazing Flux Paste is a tough, non-acidic cleaner that steps in where silver solder meets heat, handling temps from 538°C to 927°C without breaking a sweat. It cuts through oxidation to make brazing jobs cleaner and quicker, saving you on pricey filler—solid kit for plumbers, gas fitters or HVAC crews who need reliable flux that stands up to the torch. Why You’ll Love It Non-acidic formula cleans without corroding joints, keeping your work solid long-term. Break-resistant jar takes the knocks of the jobsite without spilling mid-job. Reduces silver solder needs, so you're not burning cash on every braze. Built for Real Work Made in the USA with a thick paste that flows just right under torch, furnace, resistance or induction heat—activates fast to dissolve oxides and shield from air, then washes off easy after cooling. It's the flux tradies grab for copper, brass or steel joins in plumbing or refrigeration, no fuss, just clean flows that hold up in Aussie heat and humidity. Perfect For Tradies brazing pipes, fittings or coils on HVAC installs or gas lines. Workshop pros tackling silver solder jobs without the mess or waste.

Nulon Red General Purpose Coolant Premix 4L
Overview Nulon Red General Purpose Coolant Premix 4L is a ready-to-use, multi-purpose anti-freeze and anti-boil formula that protects cooling systems in a wide range of vehicles. Pre-mixed with demineralised water, it offers full corrosion inhibition and reliable performance for up to 4 years or 200,000km—straightforward gear that keeps engines cool and efficient without mixing hassles. Why You’ll Love It Ready-to-pour design saves time on top-ups or full flushes Advanced inhibitors shield all metals from rust and scale buildup Compatible with most Aussie and Kiwi vehicles for versatile use Built for Real Work Formulated with long-life inhibitors for maximum protection against corrosion in radiators, water pumps, and hoses, this red premix handles high temps and pressures without foaming or gelling. It's tough enough for the tradie's ute on dusty runs, straightforward enough for the home mechanic's quick service—proper coolant that defaults to your system's life as a top-up, no drama, just pour and protect. Perfect For Tradies topping up or servicing fleet vehicles and machinery DIYers maintaining cars, utes, or older models for reliable cooling

Blaster Truck & Equipment Wash 1L AutoKing
Overview Blaster Truck & Equipment Wash 1L AutoKing is a super-concentrated foam bath cleaner that tackles grease, mud, and road film on trucks, machinery, and vehicles. Dilute 1 part to 10 for a rich lather that rinses clean without residue, perfect for pressure washers or buckets—solid gear that restores heavy-duty rigs to spotless without stripping wax. Why You’ll Love It High-foaming action lifts dirt and grime without scrubbing Concentrated formula makes up to 10L of wash solution pH-neutral and safe on paint, chrome, and rubber seals Built for Real Work This Aussie-made wash is formulated to cut through diesel soot, clay, and workshop buildup while protecting surfaces from corrosion. The 1L bottle handles multiple big jobs, foaming thick for even coverage on trailers or excavators—tough enough for the tradie's muddy site cleanup, straightforward enough for the home ute wash, just mix, foam, and rinse. Perfect For Tradies cleaning trucks, trailers, or earthmoving gear after jobs DIYers washing cars, boats, or 4WDs with heavy road contaminants

Nulon Engine Stop Smoke 500ml
Overview Nulon Engine Stop Smoke 500ml is a premium one-shot treatment that quiets blue exhaust smoke by rejuvenating hardened valve stem seals and reducing oil burn in engines. Poured directly into the fuel tank, it conditions seals and cleans combustion chambers for cleaner running—reliable kit that tames smoky engines without the full rebuild hassle. Why You’ll Love It Quickly cuts blue smoke and oil consumption after one tank Restores valve seals for smoother, quieter engine performance Simple pour-in use treats up to 80L of fuel or oil Built for Real Work Formulated with advanced seal softeners and detergents, this Aussie-made treatment targets root causes like worn seals and ring deposits, safe for petrol and diesel engines. It works through the fuel system to deliver results without disassembly—tough on smoke but gentle on internals, proper gear for the tradie's old workhorse or the classic car revival. Perfect For Tradies reviving fleet vehicles or high-mileage utes DIYers fixing smoky exhausts in cars, trucks, or vintage motors

Motortech Brake Cleaner 400g Aerosol
Overview Motortech Brake Cleaner 400g Aerosol is a fast-drying spray that blasts away brake fluids, oils, dirt, and grease from disc pads, rotors, clutch plates, and caliper components. It stops squeaks and ensures clean performance without disassembly, making it a must-have for quick brake maintenance—reliable kit that gets components spotless and ready without the downtime. Why You’ll Love It Quickly dissolves contaminants for noise-free braking No disassembly needed for fast, on-the-spot cleaning Evaporates residue-free to avoid attracting more dust Built for Real Work This Aussie-made aerosol penetrates deep to lift grime while being safe on metals and plastics, handling workshop spills or road buildup with ease. The 400g can covers multiple jobs, from pre-assembly prep to full clean-ups—tough enough for the tradie's ute pads after a dusty run, straightforward enough for the garage tweak, just spray, wipe, and roll. Perfect For Tradies servicing brakes on vans or job site machinery DIYers maintaining cars, bikes, or trailers for safe stops

LA-CO Heat Barrier Spray Cool Gel
Protect surfaces during high-heat tasks with LA-CO Cool Gel Heat Barrier Spray 473ml, a premium heat barrier spray designed for plumbers, HVAC technicians, and welders. Its unique, no-drip gel formula sticks to surfaces, safeguarding lead-free valves, rubber seals, and painted finishes from heat damage during soldering, brazing, or welding. Non-toxic, odourless, and non-staining, it evaporates within 48 hours, eliminating clean-up. Easier to use than heat blankets, this 473ml trigger spray offers reliable protection for components in plumbing, HVAC, and welding projects. Usage instructions ensure safe application. Key Features: No-drip heat barrier spray for precise application. Non-toxic, odourless, and non-staining; safe for skin. Evaporates within 48 hours, no clean-up required. Protects surfaces during soldering, brazing, and welding.

Boston Liquid Sealant 50ml
Overview The Boston Liquid Sealant 50ml is a high-performance anaerobic thread sealant that cures in the absence of air to create a tough, permanent, leak-proof seal on metal pipe threads and fittings. Ideal for sealing joints in plumbing, gas, hydraulic and pneumatic systems, it handles pressures up to 10,000 psi and temperatures from -55°C to 150°C—reliable, no-mess solution that replaces messy tapes and pastes for cleaner, longer-lasting seals. Why You’ll Love It Anaerobic cure locks threads tight in confined spaces without air exposure. Resists vibration, shock, chemicals and thermal cycling for secure joints. 50ml bottle with applicator brush covers plenty of fittings for multiple jobs. Built for Real Work This medium-strength anaerobic formula fills thread gaps to prevent leaks from water, gas, oils and fuels while remaining flexible enough for minor movement. It cures to a tough seal that withstands high pressure and temperature swings—straight-up kit plumbers and gas fitters trust for clean, effective connections without the hassle of PTFE tape or jointing compound. Perfect For Tradies sealing threaded joints in plumbing, gas or hydraulic systems on site. DIYers fixing leaky taps, pipes or fittings at home without mess.

Drain Away Heavy Duty Cleaner 1L
Overview Drain Away Heavy Duty Drain Cleaner 1L is the serious caustic-based liquid that clears the nastiest blocked sinks, showers and floor drains in minutes. It cuts through hair, grease, fat, food scraps and paper like they weren’t even there—pour it in, wait 15–30 minutes and flush. The go-to bottle plumbers and tradies keep in the van when the plunger just won’t cut it. Why You’ll Love It Works fast—most blockages gone in 15–30 minutes, stubborn ones overnight. Thick formula clings to pipes and attacks the blockage where it sits. Septic-safe when used as directed—no harm to your system. Built for Real Work High-strength sodium hydroxide formula (approx. 30%) that generates heat on contact with water to dissolve organic matter and break down grease. Safe for all common plumbing materials including PVC, copper and cast iron. One 1L bottle is enough for multiple treatments or one really ugly blockage. It’s the same heavy-duty cleaner Aussie plumbers have been using for decades—gets the job done when nothing else will. Perfect For Tradies clearing kitchen sinks, shower traps, laundry tubs or floor wastes on site. Homeowners unblocking slow drains before they turn into floods.

Bromic Supa Seal PTFE Thread Seal Tape Pink 10m
Overview Bromic Supa Seal PTFE Thread Seal Tape Pink 10m is a premium, high-density PTFE tape specifically designed for gas applications. Pink colour coding indicates it's suitable for natural gas and LPG lines, providing a reliable, leak-proof seal on threaded metal joints without the mess of liquid sealants. It withstands high pressures and temperatures, making it the go-to for safe, professional gas installations and repairs. Why You’ll Love It Pink colour meets Australian gas standards for easy identification on gas lines. High-density PTFE formula resists chemicals and high pressures without degrading. 10m roll covers plenty of fittings for multiple jobs without running out. Built for Real Work Made from 100% virgin PTFE with a high-density construction for superior sealing on tapered threads. It's non-toxic, non-flammable and withstands temperatures from -240°C to +260°C—tough kit that plumbers and gas fitters trust for secure, compliant connections on gas pipes, regulators and appliances, no leaks or callbacks. Perfect For Tradies sealing threaded gas joints in domestic or commercial installs. DIYers fitting BBQs, heaters or gas appliances safely at home.
Here's What Our Customers Are Saying
Articles

Status Update: Website Upgrade Completion
Our ecommerce upgrade is mostly complete, however it will still take awhile for our store to upload all our inventory, so if you don't find something on our site, it does not mean we don't stock it!

Ecommerce Store Update: Still in Progress!
We’re still fine-tuning the online inventory, so some products may not yet be listed.

Exciting Upgrade to Our Ecommerce Store!
Our ecommerce store just got a major upgrade with a fresh look and smoother navigation! While we’re updating our online inventory, some products may not yet be listed but are available in-store.
Stay in the Know - No Spam, No BS.
We know you're here for great products, not junk emails. Sign up to get exclusive access to product sales, special offers, and new arrivals - all delivered straight to your inbox with zero fluff. We promise to only send you the good stuff, when it matters.
Exclusive Deals
Be the first to hear about flash sales and discounts on your favorite hardware, tools, and garden supplies.
New Products
Stay ahead of the curve with updates on the latest arrivals across our extensive range.
Project Tips
Get expert advice, DIY hacks, and how-tos that help you tackle every task with confidence.
No spam. No BS. Just the best from Khardware.
Sign up today and start saving!
