Radiator Sealer - STP 300 ml

Availability: 100 In Stock

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.

Radiator Sealer also lubricates the water pump.

Volume: 300 ml


• Run the engine until the coolant is warm (not hot).

• Shake bottle well & pour entire bottle of STP® Radiator Sealer into radiator.

• 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.


It is suitable for all types of radiator, all types of antifreeze and safe for rubber hoses, metal parts and gaskets.


For best results, especially for older vehicles, clean the system with STP® Radiator Flush, to remove rust, lime scale and deposits before adding STP® Radiator Sealer.


We offer two shipping methods for our Cyprus Customers:

1. Standard Shipping to Closest ACS Store: The package will be delivered to the closest ACS Store based on your address. You will be notified either by a Phone Call, SMS, or a Viber message.

2. Delivery at your Door: The package will be delivered at your door. For inaccessible addresses, the package will be delivered to the closest ACS Store based on your address. You may find the list with inaccessible regions on our home page.

The estimated delivery time for this product is between 2 and 8 business days.

Alternatively, you may receive the product from our shop in Larnaca. You will be notified once your order is ready for pickup.

Just added to your wishlist:
My Wishlist
You've just added this product to the cart:
Go to cart page