The Best Radiator Stop Leak

All Weather Seal Radiator Stop Leak

I know that is a pretty bold statement. But after over 60 years of use mostly by industry professionals and still selling strong, I think it’s pretty safe to say.

Radiator Stop Leak products and their like have been around ever since there have been radiators. We’ve all heard the stories of how you can use Black Pepper, or raw egg whites to seal a leak. And unfortunately, there are some commercial products on the market that aren’t much better than those old home remedies to fixing a leak.

Stop Leak Designed to Work

All Weather Seal from Irontite Products is different. And I’m going to tell you how and why it’s different in this article. It has some unique properties that almost none of the other products on the market have.

  • It blends with your existing Anti-freeze forming a microemulsion
  • It is so small when blended that if we didn’t color it you wouldn’t know it’s there.
  • It only works where the leak is. No fear of plugging heater cores, etc.
  • It can be used as a preventative to keep vehicles in service
  • It works FAST! Within 10 min. of reaching operating temperature your leak will stop
  • It work regardless of what material the leak is in. Rubber, Iron, Aluminum, Plastic, etc., it doesn’t matter.
  • It is compatible with all the different kinds of anti-freeze products on the market today. Even the waterless anti-freeze and extended life versions.

Are you impressed yet? I know I am. Those are some pretty significant things and it’s likely you won’t find any other radiator stop leak product that can boast all of those points.

Back in the day when Irontite Products enlisted a chemist from UCLA to engineer All Weather Seal, these were all the things we wanted it to be able to do.

And the results were just what you get today. With a proven 60 year history of stopping most any kind of leak you can imagine. There are only 2 things that stop All Weather Seal from doing its job. Either the leak is just too massive or due to air pressure or moving parts it can’t stay patched.


It blends with your existing Anti-freeze

In the bottle, All Weather Seal is concentrated. One bottle (16 oz) treats up to a 6-gallon capacity cooling system.

Adding more is not necessarily beneficial. So if you have a 3-gallon system then you only need use half the bottle.

It’s very critical that you get it blended in with your cooling mixture. So be sure to add it in where circulation of the coolant is happening as soon as possible.

Once blended it would be undetectable if it weren’t for the fact that we add black pigment to it so you can tell something is there beyond just your anti-freeze mixture.

Similar to how instant coffee mixes with water and after mixing stays mixed. There is no “settling” of All Weather Seal once it is properly mixed. That is what a microemulsion is.


It only works where the leak is

Once fully mixed All Weather Seal is dormant until 2 conditions are met.

Condition one is the mixture must be at or near your engine operating temperature.

Condition two is the mixture must encounter air of a lower temperature.

When those two things happen All Weather Seal “wakes up” and starts to form a patch over the area where it is encountering the air. Similar to how a Beaver builds a dam.

And once the leak is stopped then also the action of patching goes back to being dormant and looking for the next area of escaping coolant.

And should a previously patched leak start leaking again, All Weather Seal will go to work on it again.


It Will Prevent Coolant Leaks

Many users and believers of All Weather Seal find it very useful as a preventive measure.

Fleet owners and commercial industrial equipment owners automatically add All Weather Seal to new vehicles in their fleets to help prevent any down time of the vehicle.

Over the road truck drivers keep a bottle or two around or just add it in after any coolant service.

It makes sense if you have an end loader out in the field doing work and some debris causes a small leak in the radiator or a hose clamp becomes a little loose and starts leaking.

Without All Weather Seal that vehicle may have to stop work before it’s done with the job in order to be serviced.

But with All Weather Seal in the system the leak is patched and the vehicle continues working.

This same principal applies to all kinds of different commercial settings. Rental Car companies, used car dealers, fleet trucking, etc.


It Works Regardless of What Material is Leaking

I frequently get asked if All Weather Seal will work with Aluminum engines or radiators with plastic tanks.

The answer is a resounding YES! It really doesn’t care what the material is.

It just wants to plug that leak as fast as it can and be done.

One little sidebar about radiators with plastic tanks. Plastic weakens with age. If your older vehicle with plastic tanks has had a small leak for a long time, that leak has allowed your cooling system to NOT become fully pressurized.

If you treat that vehicle with All Weather Seal. When it seals the leak and your cooling system is able to get up to it’s normal pressure level the plastic may be too weak to handle that normal pressure and burst or crack.

So be warned, this is not the fault of All Weather Seal, this is old plastic not able to function at normal pressures anymore.


Compatible with All Kinds of Anti-Freeze

As of this writing, over the past 60 years of use, there have been no reports of any incompatibilities with All Weather Seal and any antifreeze mixtures in use.

And we have had some reports from customers who tried it with some very unique cooling system solutions and were so happy that it worked they called in to tells us all about it.

All Weather Seal is made with mostly inert materials that won’t react with other chemicals. It just happily tags along suspended in solution looking for a leak to cover up.

Where Can I get All Weather Seal by Irontite?

Irontite Additives are available from most major parts stores in the U.S. and Canada. It is quickly expanding into Mexico.

You may not see it sitting on the shelf in your local parts store because shelf space is not only very competitive but in some cases, the store managers can determine what products to keep “in stock” and on the shelf.

But if you ask for it at the parts counter they will be able to get it from their main warehouse. Usually, they can get it by the next business day for you.

Be sure they spell Irontite correctly or give them the part number of 468-9130-16. A list of many store brands that carry it can be found on the Irontite Website here.

You can also purchase a bottle from Amazon if you prefer.

And if you have a small store or are a mechanic who wants to have it available for customers you can get volume discount pricing direct from Irontite Products.

Just call them up during normal business hours and choose the Parts Sales department to speak to a salesperson.