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OC Three

OC® Three – Oxygen Compatible PTFE Paste
Joint and Thread Sealer

Solutions for critical and demanding applications where no flammability, compatibility with oxygen and resistance to aggressive chemicals are essential.

OC Three PTFE Paste Joint and Thread Sealer is an oxygen-safe, aqueous-based PTFE formulation. It is a homogenous white paste that penetrates thread convolutions more effectively, and more safely, than PTFE tape. Tested, approved and certified by NASA (ASTM G72) and The German Federal Institute for Materials Testing (BAM) for gaseous and liquid oxygen service. OC Products are approved and used by the major industrial gas providers. Use in extreme temperatures (-400º F to +500º F) and as a vacuum grease for mid vacuum specifications to 10-3 Torr or in pressures up to 3500 psi (10,000 psi for fuel systems, 300 psi for natural gas). OC Three is especially capable for sealing oxygen and acetylene cylinder valves. It is compatible with diesel fuel, liquid propane gas, and pure oxygen. OC Three is safe for use with food processing applications. It is easy to apply from its 4 oz. (113.4 gram) squeeze tube with extended nipple and resealing cap. OC Three is a superior PTFE thread sealant paste that contains these optimal properties: Water Soluble - Anti-Galling - Anti-Corrosive - Anti-Seize - Chemically Inert - Non-Toxic - Non-Flammable - Non-Migrating - Odorless.

OC Three is a water based product that is not well suited for wet conditions. For wet conditions, we recommend the use of OC Five, OC Seven or OC Nine.

MPT-73 - OC Three PTFE Paste Joint and Thread Sealer - 4 oz tube - $29.95
MPT-56 - OC Three PTFE Paste Joint and Thread Sealer - 23 oz jar - $140.95

OC Three Jar

OC® Three is oxygen-safe and compatible with many aggressive chemicals including:
Acetylene; Aluminum chloride; Ammonium nitrate; Ammonium percholrate; Antimony trichloride; Bromine; Calcium hypochlorite; Carbon dioxide; Chlorosilanes; Chlorosulfonic acid; Chromic acid; Ethylene; Fluorine (gaseous); Helium; Hydrogen; Hydrogen bromide; Hydrogen peroxide (all concentrations); Hydrogen sulfide; Hydriodic acid; Iodine; Muriatic acid; Nitric acid; Nitrogen oxides; Oleum; Oxygen (liquid & gaseous); Phosphoric acid; Potassium perchlorate; Potassium persulfate; Propylene oxide; Silane; Silicone tetrachloride; Sodium hypochlorite; Sodium perchlorate; Sulfur dioxide; Sulfur trioxide; Sulfuric acid; Titanium tetrachloride.

9002 84 0 Polytetrafluoroethylene
13463 67 7 Titanium dioxide
9003 01 4 Carboxy vinyl polymer
7732185 H2O (water)

Click here for the OC Three Data Sheet.
Click here for OC® Three MSDS information.
Click here for OC® Three NASA (ASTM G72) documentation
Click here for OC® Three BAM Certification documentation.

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(Monday - Friday, 9 am - 5 pm EST)


Questions, comments or suggestions? Email or send regular mail to:
MPT Industries • 6-B Hamilton Business Park • 85 Franklin Road • Dover, NJ 07801
Phone: (973) 989-9220 – Fax: (973) 989-9234

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MPT®, OC® and Auto Chic® are registered trademarks of MPT Industries. Teflon® is a registered trademark of DuPont Corp.

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