Take note!

Suitable for all types of radiator, all types of antifreeze and safe for rubber hoses, metal parts and gaskets.

  • Lubricates
  • Prevents rust and deposits
  • Protects

Product Description

STP® Radiator Sealer is designed to repair radiator leaks quickly and effectively, forming a permanent seal. It contains corrosion inhibitors to help prevent the formation of rust and deposits. This car radiator leak sealer also lubricates the water pump.

How it helps:

  • Repairs leaks quickly
  • Provide permanent seal for radiators
  • Lubricates water pump

Take note!

Suitable for all types of radiator, all types of antifreeze and safe for rubber hoses, metal parts and gaskets.

Usage Directions

  1. Run the engine until the coolant is warm (not hot).
  2. Shake bottle well & pour entire bottle of STP® Radiator Sealer into radiator.
  3. Run the engine for approximately 10 minutes or drive a short distance, allowing seal to harden. Be careful when opening the radiator/cooling system: hot coolant or steam might escape. One bottle treats cooling systems up to 14 litres capacity.

Usage Frequency: Use as required.

Frequently Asked Questions

  • STP® Radiator Sealer is suitable for all types of radiator, all types of antifreeze and safe for rubber hoses, metal parts and gaskets.

Often bought together

Basic Maintenance