Spanjaard Radiator Sealer & Conditioner is a liquid cooling system treatment developed to provide fast and controlled sealing of minor leaks while maintaining normal coolant circulation. It is designed to work within the operating environment of modern cooling systems and is compatible with commonly used antifreeze formulations. Unlike mechanical repair solutions, this product functions internally by circulating with the coolant and responding only at leak points, allowing users to address seepage without dismantling components. Its formulation supports short-term and intermediate system reliability while preserving normal cooling performance.

• Leak Sealing Action - Spanjaard Radiator Sealer is formulated to seal minor leaks within the cooling system by forming a controlled internal barrier at seepage points. With a viscosity range of approximately 280 to 350 cP at 25 degrees Celsius, the fluid maintains sufficient flow to circulate while remaining capable of sealing micro-gaps. This balance supports effective leak control without obstructing coolant passages.

  
  

• Cooling System Compatibility - The product is compatible with antifreeze and coolant formulations commonly used in automotive and light industrial cooling systems. It is suitable for systems with coolant capacities up to approximately 10 litres, allowing predictable dosing and circulation. Compatibility ensures stable performance without chemical interaction that could degrade coolant quality.

  
  

• Material Safety - Spanjaard Radiator Sealer is safe for use in systems containing aluminium engine blocks and cylinder heads. The formulation avoids aggressive compounds that could attack lightweight metals, supporting long-term system integrity while addressing leak-related issues in modern engine designs.

  
  

• Thermal Stability - The product operates reliably within normal cooling system temperature ranges, maintaining sealing performance under continuous thermal cycling. Its stability ensures that sealing action remains effective as the system heats and cools during operation, without breakdown or loss of function under standard operating temperatures.

  
  

• Corrosion Control - In addition to sealing leaks, the formulation supports internal protection against rust and corrosion. By limiting coolant loss and stabilising internal conditions, the product helps reduce oxidation risk within the cooling system, contributing to sustained thermal efficiency and component protection.

• Radiator Leak Repair - Spanjaard Radiator Sealer is used by adding the recommended quantity directly into the radiator or expansion tank while the engine is cool. After addition, the engine is run to circulate the product throughout the system, allowing the sealer to reach and seal minor radiator leaks during normal coolant flow.

  
  

• Cooling Hose Seepage - In cases of minor hose seepage, the product is circulated with the coolant to address micro-leaks at hose connections and sealing points. The sealer responds to pressure and temperature changes, forming a seal at leak locations without requiring hose removal or system disassembly.

  
  

• Head Gasket Seepage - The Spanjaard Radiator Sealer & Conditioner can be used to reduce minor head gasket seepage by circulating within the cooling system under operating conditions. Application involves normal engine operation after dosing, allowing the sealer to stabilise leak points while maintaining coolant circulation and heat transfer.

  
  

• Corrosion Prevention Use - Spanjaard Radiator Sealer is used as part of cooling system maintenance to help protect internal surfaces against rust formation. By maintaining coolant containment and supporting stable operating conditions, it assists in reducing corrosion-related degradation over time.

  
  

• Emergency Cooling Repair - In emergency situations, the Spanjaard Radiator Sealer & Conditioner provides a temporary repair solution that allows continued vehicle or equipment operation until permanent servicing is available. Proper use involves following dosage guidelines and monitoring coolant levels to maintain safe operating temperatures.