Product FAQs

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HEAT PROTECTION

Questions and Answers

What is Cool Gel® and what does it do?

Cool Gel® is a gel that is easily sprayed onto heat sensitive surfaces when soldering or brazing. This amazing gel protects the surface that it is sprayed on, and does not allow the surface to be burned.

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What surfaces can Cool Gel® be used on?

Any surface! Go to the Cool Gel page to view some common Cool Gel® applications.

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Do I have to wipe Cool Gel® off?

No, it will evaporate from any surface in 24-48 hours without leaving residue or staining.

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Will Cool Gel® stain drywall, cabinets, hardwood flooring, or other expensive finished surfaces in a home?

No, Cool Gel® will not leave any stains or residue on dry wall, stainless steel, etc. If it is not wiped off it will evaporate in 24-48 hours.

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What happens when Cool Gel® freezes?

LA-CO® recommends you do NOT let the product freeze. Since there is some water in Cool Gel®, there is the possibility of freezing. If the product freezes, it will not be as thick and you will have to use more product to get the same coverage.

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Can Cool Gel® be sprayed on the joint that is about to be soldered or brazed?

No, Cool Gel® should not be sprayed on a joint that is soon to be soldered or brazed.  Cool Gel® will prevent this joint from being properly joined and could cause a leak. Please pay attention where you spray.

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THREAD SEALANTS

Questions and Answers

Can Slic-tite® be used on Oxygen service?

Although Slic-tite® was engineered to work with and perform on most gas systems, it is not for use on Oxygen service. There are however, several other LA-CO® products that are usable. OXY-TITE®, Slic-tite® High Density PTFE Thread Tape or LA-CO PTFE Thread Tape can all be safely used. For more information on these products, visit the Pipe Thread Sealants category of the LA-CO website. You can also view the Thread Sealant Application Chart under the Resources section of this website.

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Will Slic-tite® stain my clothes or hands?

No, Slic-tite® will wash off your hands with soap and water. If it gets on your clothes, Slic-tite® will come out with regular laundry detergent. Like any other chemical on your clothes, try to wash your clothes as soon as possible to get the best results.

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What do I do if I need a thread sealant that is different than Slic-tite® premium thread sealant?

LA-CO® manufactures a variety of thread sealants. To find the preferred thread sealants for your application, simply visit the Pipe Thread Sealants category of this website.

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What is the difference between Slic-tite®‘s “grit” and other thread sealants “smooth” compounds?

LA-CO® developed Slic-tite® with large particulates of PTFE or “grit” to help prevent leaks by filling the voids or valleys better than microscopic or “smooth” compounds. The more PTFE, the better the lubrication and leak prevention.

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Does Slic-tite® set up hard?

No, Slic-tite® was designed to be removed with little-to-no effort even 50 years after it was applied, making it a virtually no set thread sealant. Unlike the competition, it will remain soft inside the threaded connection. Any material outside the threaded connection and exposed to air will get hard over time.

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Does Slic-tite® contain more PTFE than other thread sealants?

Yes, Slic-tite® contains more PTFE than most thread sealants, which gives it a greater sealing power

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How do I know which thread sealant is best for the particular service I am performing?

The LA-CO® Thread Sealant Application Chart will give you a comprehensive breakdown of which sealant will work best for a particular service. The chart can be found under the Resources section of this website.

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Can I use OXY-TITE® on oxygen lines?

Yes, each batch meets the ASTM G-72 standards and is an inert thread sealant.

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Can I use PTFE Thread tape for oxygen lines?

Yes, but PTFE Thread Tape will not help prevent leaks when the copper has annealed due to excessive heat near the threaded connection during the brazing process. The OXY-TITE® compound was engineered similarly to Slic-tite®. It contains PTFE and other fillers to help fill the voids and cracks and prevents leaks.

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What is the sealing temperature for OXY-TITE®?

The sealing temperature is-320°F to 450°F (-196°C to 232°C).

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What is Slic-tite® Stik?

Slic-tite® Stik is premium grade thread sealant in stick form! Use the stick like a crayon to apply premium thread sealant to a variety of pipes and fittings. Slic-tite® Stik is simple to use and easy to carry – it fits in a shirt pocket!

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Where can I use Slic-tite® ?

Slic-tite® is USDA approved for use in federally inspected meat and poultry plants. It can be used to seal threaded connections that are in these plants as long as there is no food contact. Application examples include air or hydraulic lines for machinery, waste pipes, sprinklers, etc. It can also be used on all plastic and metal threaded connections. 

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FLUX

Questions and Answers

Does LA-CO® Regular Flux contain lead?

No, LA-CO® Regular Flux is lead-free.

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Do I need to use abrasives to clean my pipe and fittings before using LA-CO® Regular Flux?

LA-CO® Regular Flux has a super cleaning action on copper pipe. However, one should always properly clean pipe and fittings before soldering. To find out if an abrasive is needed, consult your local plumbing codes.

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Is LA-CO® Regular Flux affected by extreme temperatures?

LA-CO® Regular Flux is an all-weather flux. Unlike other fluxes, LA-CO® Regular Flux will not melt and become runny in the summer or freeze and become unusable in the winter.

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Which LA-CO® flux meets ASTM B813, which is the industry standard for water-soluble materials?

Two types of LA-CO® flux meet the ASTM B813 code: both LA-CO® Regular Flux and LA-CO® Flux-Rite 90®. Both of these types of flux are water-soluble, and will prevent flux pitting corrosion from occurring on the inside of copper pipe. These types of flux will thoroughly wash through and leave the system clean and free of flux. They will not clog aerators, tankless water heater lines, or other systems.

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I have heard that if I use LA-CO® Regular Flux, the pipe will turn green – is this true?

When LA-CO® Regular Flux is applied on copper pipe; it can eventually induce a slight green coloring on the pipe. To prevent the green color from appearing, simply wipe the joint after soldering. This will remove residue and make your copper joint look great. The green coloring is due to oxidation. LA-CO® Regular Flux cleans copper so well that the copper oxidizes quickly in order to prevent corrosion. LA-CO® Regular Flux is water soluble, and it will prevent flux pitting corrosion from occurring on the inside of the copper pipe.

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REPAIR SEALANTS

Questions and Answers

What is the maximum pressure HEAT-SEAL STIK® will work to?

HEAT-SEAL STIK® will work to 600 psi.

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Can I use the HEAT-SEAL STIK® on aluminum?

Yes, HEAT-SEAL STIK® is designed for repairs on aluminum, as well as, copper and other metals.

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Can I use the HEAT-SEAL STIK® on a potable water line?

Yes, HEAT-SEAL STIK® is NSF approved.

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What is the maximum size hole that the HEAT-SEAL STIK® will repair?

The hole can be no bigger than 1/8”

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How do you use HEAT-SEAL STIK®?

Once the leak has been located, pull a vacuum, recovering any remaining refrigerant. Mechanically clean the area with a knife or stainless steel brush. Do not use sand cloth or other products that will potentially leave a residue. If sand cloth is used, the epoxy will not stick to the pipe but to the abrasive residue left behind. Heat adjacent to the leak (Do not put the flame directly on HEAT-SEAL STIK® as it will melt). Test the HEAT-SEAL STIK® by touching it to the metal as the flame is heating the surface. Keep the flame adjacent to the leak and once the HEAT-SEAL STIK® begins to melt, rub thoroughly over the leak until covered. Allow the epoxy to cool to room temperature or shock with a wet rag to cool. Test the system with sure chek®, VISU-GLOW®, or ALERT® leak detectors to verify the leak has been repaired. Recharge the system. Remove cured epoxy from the stik with a knife before next use. Cured epoxy cannot be reused.

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Can I use the same HEAT-SEAL STIK® again?

Yes, but you must cut the cured end of the HEAT-SEAL STIK® off before using again.

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LEAK DETECTORS

Questions and Answers

Why should I use sure chek®, VISU-GLOW®, or ALERT® instead of soap to check for leaks?

Liquid dish soaps can be corrosive to various metals due to their high content of chlorides and halogens. Because sure chek®, VISU-GLOW®, and ALERT® are non-corrosive and non-toxic, they will not damage the pipes being checked.

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Is sure chek® okay to use on CSST systems?

Yes, all LA-CO® leak detectors are okay to use on CSST systems. Sure chek®, along with VISU-GLOW® and ALERT® contain low chlorides and halogens so they do not damage metals. Be sure to check the warranty requirements of your CSST manufacturer before using any chemical.

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Can I use any leak detector on an oxygen system?

When checking an oxygen system, make sure to use a leak detector that is safe for oxygen. All of LA-CO® leak detectorsSure chek®, VISU-GLOW®, and ALERT® – are safe for oxygen systems.

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