HyloCool LS-3 Thermal Barrier Gel 8oz bottle.
 
HyloCool is the amazing new product from Hylomar for use in welding, brazing, and soldering for temporary heat protection of sensitive parts. Use this gel to prevent heat transfer, and protect paints, coatings, and surface finishes, protect valves and fittings, rubber and electric wiring, and to avoid warping thin sheets of metal.

Hylocool works through evaporative cooling. The heat density of water is extremely high, and the HyloCool gel traps the water at the metal surface, and doesn't let it run, even boiling upside down. For videos see www.hylocool.com, or consult the tabs for more information.

 

 

HyloCool Sales Information Sheet
Sales Sheet

HyloCool Sales Information Sheet (Spanish / en espanol)
en Espanol

How it Works

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HyloCool is an aqueous gel that adheres to horizontal and vertical surfaces, even when heated, and absorbs heat. HyloCool Thermal Barrier Gel works by trapping water on the surface of the substrate. Its additives and surfactants reduce the boiling point of the water, increase the surface area in contact with the metal, and hold the gel in place. The phase change from liquid to gas absorbs the heat as evaporative cooling. Under high or sustained heat HyloCool will evaporate, leaving a minimal amount of residue behind.


Instructions for Use

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For welding: put a bead of HyloCool around the object being heated and the gel will inhibit heat transfer. The size of the bead required will depend on the heat source, duration, and thickness and thermal conductivity of the object. HyloCool is not a substitute for safety equipment. Use proper and sensible protective equipment, including gloves and eyewear, when welding. Reapplication may be necessary, particularly on vertical surfaces.

As a masking compound: Spread a layer of HyloCool over the area exposed to heat. Thicker layers will provide more protection. Horizontal surfaces will be protected longer. Re-application may be necessary.

Clean up: HyloCool will wash off with water, or with a moist towel. Any baked-on residue can be removed with light abrasion, such as with steel wool.

Storage: HyloCool must be kept from freezing, as the thixotropic gel will loose its cohesion and collapse.

Frequently Asked Questions about HyloCool

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How does it work?

HyloCool works through evaporative cooling. It traps water in place on the surface of the metal, even while superheated. By using surfactants and mineral components, the gel sticks to the metal surface even when held upside down. The end result is that the water boils, absorbing heat from the metal surface, and preventing the heat from traveling beyond the gel. The effect lasts as long as their is water trapped in the gel.

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Is it safe?

HyloCool is almost entirely water. It has no hazardous or toxic components, and has minimal safety hazards. For more information, consult the Material Safety Data Sheet.

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Does it leave a residue or discolor?

HyloCool prevents the discoloration caused by the oxidation of the metal surface at high temperatures. HyloCool, being largely water, evaporates. A small crusty residue with the consistency of clay may bake on if the HyloCool boils entirely away. It can be easily removed with light abrasion, for example steel wool.

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How much do I need?

Water has a very high heat density, and its phase change from liquid to gas (ie boiling) absorbs significant heat. How much HyloCool you will need for a given task will depend on how much heat you direct at the substrate's surface. The higher the temperature differential, or the longer the heat is applied, the more gel that will be required. A large object (such as an engine block) absorbs a tremendous amount of heat, so HyloCool will have only a temporary effect on its surface. A muffler is subjected to intense high heat, so near the exhaust manifold HyloCool will have only a temporary effect. For welding, HyloCool is very effective as this is intense, localized heat applied to a small surface area, and HyloCool prevents this heat from spreading.

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