Our mission can be summed up in one word - SEALITAL®. We believe it so much we’ve trademarked it.

Since 1948 O.G. Supply, LLC. has built a solid reputation around the world as an innovative sealing solution provider to the boiler industry. With millions of hand-hole and man-hole gaskets sold into service, we have become experts in the art of sealing high pressure / high temperature steam.

We service our clients from two facilities.

• The headquarters is located in Cibolo, Texas and 30 minutes from the heart of San Antonio. The 10,000 sq. ft. facility was built in 1988 and has expansion capabilities to host an additional 15,000 sq. ft. of manufacturing.  On March 17, 2015 -  O.G. Supply was recognized by State of Texas and received the 2015 Governor’s Small Business Award. 

• The Corona, California factory serves as our west coast manufacturing and distribution facility.  The facility is 15,000 sq. ft. and includes wide selection of industrial gasketing capabilities. We specialize in high volume OEM components.


Products include:

Boiler Gaskets      

  • Hand-Hole         
  • Man-Hole            

Tape and Rope     

  • Twisted        
  • Knitted          
  • Braided 

Insulation Materials

  • Blanket 
  • Board
  • Paper

Industrial Gasketing

  • Full Face and Raised Face
  • Spiral Wound
  • Ring Type Joint

Mechanical Packing

  • Carbon and Graphite
  • Aramid
  • Synthetic


The Blue-Max® gasket is the only one of its kind. Designed and manufactured to perform in steam, this proprietary formula of tacky cloth utilizing glass synthetic fibers, brass wire and impregnated with a modified blue elastomer compound continues to surpass the performance of molded rubber gaskets in steam applications. For added value, the Blue-Max® gaskets are wrapped with a special PTFE which help to create the initial seal and prevent the gasket from sticking when removed.

The Black-Max® gasket stands apart from all others when it comes to high temperature and high pressure. This gasket in manufactured with penta-layering of high temperature graphite and 316 stainless steel foil and is a fail-safe alternative to the spiral-wound gasket.

Blue-Max® and Black-Max® are registered trademarks of O.G. Supply, LLC.

Request Product / Custom Size
If you don't see your product or size listed, please complete our product request form and we will do our best to fulfill your order promptly.
Contact Info

OG Supply, Inc.
150 Vander Street
Corona, California 92880

P: (951) 279-7840
F: (951) 279-7779

OG Supply, LLC.
1150 Guadalupe Dr.
Cibolo, TX 78108

P: (210) 370-7990
F: (210) 314-2295