Holts Speedflush Coolant Flush, Universal Car Radiator Flush For Radiators & Co

Fill system with water, add Speedflush (250ml). Run engine 10-15 mins (idle, no load) to circulate cleaner. Drain old coolant (keep for reuse if fresh). ✅ Universal Compatibility – Safe for all car makes/models (petrol, diesel, hybrid) and all coolant types.

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