Frequently Asked Questions

(FAQ's) - Click on a Question to See The Answer


I've had a bottle of All Weather Seal sitting in my shed for a couple years, is it still OK to use?

When treating with Ceramic Motor Seal do I leave the heater turned on full or should I leave it closed off?

Will ThoroFlush remove [some other brand stop leak] so I can try using either Ceramic Motor Seal or All Weather Seal?

Can I use All Weather Seal along with another product?

How do I figure out which sealer I should use, All Weather Seal or Ceramic Motor Seal?

If I use the All Weather Seal and it doesn't fix my leak can I go back and use the ceramic sealer?

Do I need a full 16 ounce bottle of AWS in my 4 cylinder car with a 2.5 gallon capacity?

What if I have already used another brand of sealer?

My tractor does not have a circulating pump for the cooling system. Is there any advantage to using ThoroFlush in it and will All Weather Seal work in this vehicle?

I am about to use your all weather sealer. I was just curious it it is harmful to turbo cars or if it ok to use?

Do Irontite Sealant Products clog the heater core?

The Instructions say to use ThoroFlush for 10 minutes. If I think my cooling system is extra dirty should I leave ThoroFlush in for 20 or 30 minutes to be certain that I've cleaned it well?

I used the All Weather Seal to fix a coolant leak. It worked well, but now I don't get any heat when I turn on the cars heater.

Do your Sealant Products require any special handling as a hazardous waste product?

How does Ceramic Seal work?

How does All Weather Seal work?

I don't have a radiator cap, should I pour the Irontite Sealant into the overflow jug?

Will All Weather Seal Fix My Heater Core?

Aren't all Engine Cooling System Flush Products about the same?

Will Irontite Sealant Products fix a head gasket leak?

Will Irontite Sealants damage or adversely affect my cooling system thermostat?

My newer model vehicle has a filter system as part of the cooling system. Can I still use either the All-Weather Seal or the Ceramic Seal?

Does Irontite Offer Any Guarantee?



I've had a bottle of All Weather Seal sitting in my shed for a couple years, is it still OK to use?

All Weather Seal has no known shelf life, due to lack of movement it is advised to shake the container well prior to usage. The same is NOT TRUE for Ceramic Motor Seal. Ceramic Motor Seal must be turned on a regular basis and will eventually harden in the bottle after a long period of time and this is not recommended to use.

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When treating with Ceramic Motor Seal do I leave the heater turned on full or should I leave it closed off?

As long as the cooling system has been maintained, circulation of our products thru the complete system including heating systems is recommended.

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Will ThoroFlush remove [some other brand stop leak] so I can try using either Ceramic Motor Seal or All Weather Seal?

Yes, use ThoroFlush in confidence!

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Can I use All Weather Seal along with another product?

If another product was used previously you cannot use All Weather Seal with it. You must Flush the system with our Thoro-Flush then add in fresh coolant mixture along with All Weather Seal.

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How do I figure out which sealer I should use?

IF the Cooling System concerns are; Cracks, Porosity, Sand Pit area or head gasket leak and you wish to Coat the Cooling system to minimize or eliminate electrolysis, then Ceramic Motor Seal in the bottle with the Red Cap is the best answer.

IF the Cooling System concerns are; Head or Intake Gasket leaks, Gasket Seepage, leaky Radiator, drippy Freeze Plugs, or you just want to prevent possible future leaks, then All Weather Seal in the Bottle with the Blue Cap is the answer.

IF IN DOUBT, it is best to use all three additives for maximum protection. ThoroFlush to clean the cooling system for a fresh start and to insure any treatment will have solid clean surfaces on which to adhere. Then Ceramic Motor Seal to treat and seal every crack and crevvas. And finally All Weather Seal for added leak protection now and in the future should a new leak appear.

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If I use the All Weather Seal and it doesn't fix my leak can I go back and use the ceramic sealer?

Yes, however all coolant must be Flushed Prior from the system, we recommend our Thoro-Flush to clean the Cooling System prior to using Ceramic Seal.

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Do I need a full 16 ounce bottle of AWS in my 4 cylinder car with a 2.5 gallon capacity?

With smaller cooling systems, installers could cut the consumption in half. Will it hurt if I use the whole bottle anyway? Using all will not overdose the system.

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What if I have already used another brand of sealer?

If another product was used previously, then all coolant must be Flushed from system with our Thoro-Flush prior to introducing new product into the Cooling System.

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My tractor does not have a circulating pump for the cooling system. Is there any advantage to using ThoroFlush in it and will All Weather Seal work in this vehicle?

Thoro-Flush cleanses the interior coolant passageways to an "as new" condition, however for ANY of our products to be effective, low pressure circulation must occur. If an outside source (pump) of low pressure (8-12 lbs) circulation can be attached for pressured product flow, with the engine running at operating temperature, then our products will perform as expected.

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I am about to use your all weather sealer. I was just curious it it is harmful to turbo cars or if it ok to use?

With engine coolant leaks,"Evaluation & Diagnostics" is key in going forward as to direction of repair, being either mechanical or chemical.

For vehicles with Turbos, many Off Road Construction Equipment and over the Road Class 8 Trucks utilize high compression Diesel Engines, many with Turbo's, who use our "All Weather Seal" having great success with no known ill effects.

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Do Irontite Sealant Products clog the heater core?

When used properly, Irontite products will not clog the heater core. It's very important that your cooling system be "free flowing". This is why we recommend that you always use our ThoroFlush product to completely clean your cooling system prior to using our sealant products. This is especially true when using the Ceramic Seal. The Ceramic seal product will react with engine coolant. During normal use, engine coolant (anti-freeze) does get absorbed into the pours of the metal that it flows through. If you do not first clean these internal surfaces the Ceramic Seal will bond with the coolant in these porous areas and can result in doing more harm than good. Our ThoroFlush product is specifically designed to rid your engine cooling system of all traces of engine coolant, thus insuring proper desired results from using our Ceramic Seal product. The Irontite ThoroFlush is the strongest coolant flush on the market today.

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The Instructions say to use ThoroFlush for 10 minutes. If I think my cooling system is extra dirty should I leave ThoroFlush in for 20 or 30 minutes to be certain that I've cleaned it well?

NO! Irontite ThoroFlush is the strongest coolant flush on the market. Over using it WILL cause damage. Follow the instructions exactly when using any Irontite products. Irontite products have been in use for many years and we have determined the best procedures for their use over the years. Follow our instructions exactly to avoid problems and to have the best possible experience. The ThoroFlush product has a red colored dye added to it specifically so you can tell when you have completely flushed it from the system. Failure to remove it completely or in a timely fashion can cause damage to your vehicles cooling system.

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I used the All Weather Seal to fix a coolant leak. It worked well, but now I don't get any heat when I turn on the cars heater.

Because All Weather Seal can be used along with your existing cooling system fluid (anti-freeze) if your car is older and the heater core tubes have become caked with sediments over the years reducing the flow of coolant it's possible that All Weather Seal will do it's job and close off those tubes that are not as free flowing as they should be. Though rare, this is not improper behavior of All Weather Seal. It is an indication that your heater core was extremely calcified and preventing proper flow and/or you did not flush the system with ThoroFlush prior to adding All Weather Seal product to your cooling system.

To recover from this problem you do not necessarily need to replace the heater core of the vehicle. You should first disconnect the heater core hoses and attempt to run water through the core in the reverse direction to unclog the core and flush it as much as possible with a small amount of water pressure. Now, reconnect your heater core hoses and use our ThoroFlush product to clean your cooling system. Then add new coolant and the All Weather Seal. Because our All Weather Seal never fully hardens, this method should recover the heater core, and may improve the heaters performance after the ThoroFlush has cleared the sediments from the core. Even if this does salvage the heater core, the fact that it clogged on you is an indication that the heater core in this vehicle should be replaced sooner than later.

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Do your Sealant Products require any special handling as a hazardous waste product?

No. Our coolant additive products are all Environmentally Safe. These are very green products.

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How does Ceramic Seal work?

Our Ceramic Seal product requires Heat and Circulation to coat all the walls of your cooling system. It fills in any cracks, crevasses and porosity in the metal, making a glass-like smooth surface that actually improves flow. This flow improvement has been shown to also improve the cooling characteristics of your engine coolant. Ceramic Motor Seal is a process that requires removal of all coolant and flushing with water prior to treatment. Then after the treatment process it's important to once again flush the system with water multiple times before re-introducing your coolant mixture into the system. Ceramic Motor Seal in the Red Capped bottle MUST NOT BE USED WITH Anti-Freeze or any other chemical. It's mixed with water, added to the cooling system and then heated while circulating to seal the cooling system.

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How does All Weather Seal work?

Our All Weather Seal product requires Heat and Air to become solid. So as long as it's flowing through the cooling system where it only gets heat and NO air it remains a microemulsion liquid mixture combined with your existing anti-freeze. It's a "Pour and Go" solution. If there are any openings in your cooling system, as the microemulsion liquid leaks and comes into contact with air, it solidifies and effectively closes the opening, sealing the cooling system. This "Patching" process means that it works anywhere there is a leak. Hoses, Freeze Plugs, Radiator holes, cracks, seams, etc. You should monitor your cooling system in the very beginning of treatment while using All Weather Seal. All Weather Seal is the perfect solution for a quick and easy fix to a cooling system leak, but it's even better as a preventative measure for commercial and "working" vehicles. Keep your construction equipment in the field making you money rather than sitting in the shop waiting on a new radiator or other part that was damaged because of a cooling system leak. Great to use in Fleet vehicles to keep them on the road. And it's like a Ginie in a bottle for older cars that just need a bit more life.

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Will All Weather Seal fix a Heater Core?

Because of the way that All Weather Seal works it can be used to stop a heater core leak. However, it will depend greatly on how damaged the core is. It is hightly recommended that you flush the system with our ThoroFlush product first, to remove any rust or other system contaminants. This may expose even more leaking that was originally present and may result in leaks too severe for any pour-in product to repair. Otherwise it will clear out debris that could have cause excessive blockage and potentially making your heater core not leak but also not heat. So be aware, that any product used to stop a leak can potentially cause a heater core to stop producing heat. But that likely means the heater core was very near to that condition in the first place.

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I don't have a radiator cap, should I pour the Irontite Sealant into the overflow jug?

Yes. Putting the sealant products into the overflow jug will work! Modern cars have a fully pressurized system. The main things you want to accomplish is to add the product to a "flowing" area. Older cars may have an overflow jug that does not have coolant flowing through the jug during normal operation of the vehicle. So you would not put the product into this area.

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Aren't all Engine Cooling System Flush Products about the same?

NO. Irontites' ThoroFlush product is a "commercial grade" product. It will out perform any other company's radiator flush product on the market today. And it's especially important to be sure to get your cooling system thoroughly cleaned prior to using the Irontite Ceramic Sealant. No product other than ThoroFlush will clean your cooling system more completely.

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Will Irontite Sealant Products fix a head gasket leak?

YES. Either the Ceramic Seal or the All-Weather Seal will repair minor head gasket leaks.

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Will Irontite Sealants damage or adversely affect my cooling system thermostat?

No. We recommend leaving the thermostat in during treatment because it will cause pressure to build which will aid and benefit the sealing process.

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My newer model vehicle has a filter system as part of the cooling system. Can I still use either the All-Weather Seal or the Ceramic Seal?

Yes, you can use either of the Irontite Sealant products, however, you must first bypass the filter. In the case of Ceramic Seal, after you have run the Ceramic Seal treatment and removed the product from your cooling system you can remove the filter bypass and run normally. Once the Ceramic Seal has cured in the cooling system it will not re-liquify and as such it will not clog the filter. During the treatment period of either product you must bypass the filter. Since All Weather Seal is meant to be left in the cooling system, as long as the All Weather Seal product is flowing in your cooling system the filter bypass must remain in affect.

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