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Item Information

Item condition:
Brand New
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More than 10 available / 164 sold
Please enter a quantity of $qty_dummy$ or less Please enter a quantity of 1 Purchases are limited to $qty_dummy$ per buyer Please enter quantity of 1 or more Please enter a lower number Choose quantity that is less than $qty_dummy1$ or equal to $qty_dummy$ You can only choose quantity that is equal to $qty_dummy$
GBP 8.50
Approximately AU $16.78(including postage)
20 watching
Experienced seller
164 sold
New condition
May not post to Australia - Read item description or contact seller for postage options. | See details
Item location:
Prontoparts, United Kingdom
Posts to:
United Kingdom
International shipping and import charges paid to Pitney Bowes Inc. Learn More- opens in a new window or tab
14 day, buyer pays return postage See details
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Last updated on  05 Jul, 2014 00:32:15 AEST  View all revisions

Item specifics

Brand New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition

PRONTOPARTS For car spares Fast

Visit my eBay store  


Seal-Up is a unique combination of modified sodium silicate (liquid glass) and copper. Whilst in the bottle or mixed with water, it remains liquid with the copper sinking to the bottom.

How does Seal-Up Work?

Seal-Up cures by exposure to the atmosphere and turns into a solid ceramic substance enriched with copper. The copper has two effects: first of all it strengthens the weld and then it transfers heat, thereby helping to eliminate hot spots. Seal-Up bonds with all metals (and even some plastics) and builds a ceramic-metallic weld, which is extremely strong, high heat resistant and permanent for the life of the engine.

How strong is Seal-Up?

Seal-Up will easily repair holes of up to 1mm diameter and cracks of any length up to 0.5mm wide (both of which would result in major coolant loss). Seal-Up, once cured, will withstand temperatures of up to 540ºC (1000ºF) and pressures of up to 3000 psi. It is designed to expand and contract with the radiator or block and is also heat conductive in order to eliminate hot spots. Seal-Up should also be used immediately after an engine rebuild to ensure that the head, gaskets and other weak points in the cooling system are properly sealed. This will help to avoid the frustration of having to 'fix the repair'.

Other information about Seal-Up.

Seal-Up will be most effective if, after treatment, the cooling system is drained and left empty for 2-3 hours or preferably overnight.

Seal-Up, unlike "pour-in-and-drive-off" stop leak products, is suitable for all cooling systems (incl. Rover 800 series) since it is made up of minute particles of less than 1 thou diameter. However, it must not be mixed with coolant!

Seal-Up is supplied in bottles of 323 g (11.4.oz) which will treat cooling systems containing up to 23 litres of water. For larger cooling systems, 2 bottles should be used.


Seal-Up is the world’s first permanent Cooling System repair product.
If you have a blown head gasket, cracked engine block or leaking radiator, Seal-Up will stop the leak permanently, without the need for any expensive and time consuming labour and spare parts.

Seal-Up will repair liquid based cooling systems in :

  • Motor Cars
  • Lorries
  • Agricultural Vehicles
  • Building Site Plant
  • Classic Cars

Seal-Up fixes leaks in:

  • Radiators
  • Engine Blocks
  • Cylinder Heads
  • Seal-Up is as easy, clean and simple to use as adding anti-freeze.
  • Drain the anti-freeze from cooling system
  • Fill with clean water
  • Run the engine until warm & all valves open
  • Top up the water & add Seal-Up
  • Run the engine until the leak stops (about 20 min.)
  • Drain the remaining Seal-Up and water
  • Leave to cure for 2-3 hours
  • Picture shows one shaken and one not. Listing is per bottle.

Same day despatch!

Business seller information

Prontoparts Motorshop
208 Ashingdon Road
United Kingdom


Return policy

Item must be returned within
14 days after the buyer receives it
The buyer is responsible for return postage costs.
Return policy details
We will happily refund parts ordered that are incorrect but unfortunately cannot refund postage costs. Please report non delivery within 48 hours.

Refunds by law: In Australia, consumers have a legal right to obtain a refund from a business for goods purchased if the goods are faulty, not fit for purpose or don't match description. More information at returns - opens in a new window or tab.

Questions and answers about this item

No questions or answers have been posted about this item.

Seller assumes all responsibility for this listing.

Postage and handling

Item location: Prontoparts, United Kingdom
Posting to: United Kingdom
Domestic handling time
Will usually post within 1 business day of receiving cleared payment - opens in a new window or tab.

Payment details

Payment method Preferred/Accepted  
Credit or debit card through PayPal

Immediate payment required for this item

Immediate payment of GBP 8.50 is required.

Seller's payment instructions

* To Pay by phone call 01702 547501 *

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