Masai® designs & manufactures an exclusive range of high-quality enhancement upgrades & parts for Land Rover Defenders, e.g. windows, head-linings, roof racks, seat covers, carpets, steps, winch bumpers, lights, and much much more. Based in central England with global shipping, we also offer expert fitting and full vehicle rebuild services at our workshop – Fitting Enquiries. Read More.
Ravenol OTC Organic Technology Coolant & Antifreeze Concentrate C12+ (5 Litres)
Provide long-lasting, comprehensive cooling system protection for your vehicle with the 5-litre bulk container of Ravenol OTC Organic Technology Coolant Concentrate (DA6294). Utilizing advanced Organic Acid Technology (OAT) coupled with high-grade silicate inhibitors, this premium monoethylene glycol-based concentrated coolant delivers extended, maintenance-free performance across all seasons.
Specially formulated for modern high-performance engines—including advanced aluminum blocks—it actively defends against internal corrosion, cavitation, freezing winters, and summer overheating without building up scale or sediment.
Key Features:
- Extended-Life OAT Formulation: Premium organic inhibitor technology provides exceptional, long-term corrosion protection for the entire cooling circuit.
- Large 5-Litre Volume: Ideal for complete system flushes, full coolant refills, and workshop stock on hand.
- Aluminum & Alloy Protection: Expertly balanced additive package safeguards all metals used in modern cooling systems, preventing premature wear on radiators, water pumps, and engine blocks.
- Year-Round Thermal Control: Delivers robust freeze prevention during sub-zero winters and reliable boiling-point elevation under heavy summer loads.
- Safe Seal & Gasket Compatibility: Free from nitrites, amines, and phosphates, ensuring protection for rubber hoses, gaskets, and plastic radiator components.
- Concentrated Formula: Designed to be mixed with clean water to achieve your desired level of freeze-point protection.
Welcome to the Masai® eStore. We design and manufacture a wide range of high-quality vehicle upgrades, enhancement accessories and parts for the Land Rover Defender, 90, 110, and 130, particularly glass and windows; but have a look around our website – we also have roof racks, spare wheel carriers, headlinings, interior trims, seat covers, side steps, rear steps, lamp guards, tree sliders, Winch Bumpers, and LED lights etc.
One of our flagship products is our own-design Masai® Bonded Tinted Panoramic Windows for the Land Rover Defender 90, 110 and 110 2-Door. The dark-tinted toughened glass side panel windows increase your Defender’s privacy, security and value! As featured on exclusive Nene Overland Defender Icons.
We have a large range of premium-quality Driving Lights, Work Lights and Spot Lights. Some are modern low-power-consumption LED Lights, and others are high-luminosity Xenon HID vehicle lights. All lights are harsh environment compliant to IP65 or IP67. Rugged waterproof diecast aluminium housings (some ABS), spot beam and flood beam, various wattages from 15 to 150 and a wide voltage range from 9v to 32v. We also sell NAS LED lights for Land Rover Defenders, clear, coloured and smoked sets for all post 1983 90 and 110, include plinths, E marked (EU approved) and SAE approved. They provide increased visibility (brighter than standard bulbs) and they enhance and modernise the look of your Defender, easy to fit DIY.
