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H-Seal (Metal Seal)
Custom Metal Fabrication

Bostec's revolutionary H-Seal are the most reliable, flexible and cost effective metal seals in existence. H-Seal™ provide an ultra high vacuum (UHV) seal that is particle free, impermeable to moisture and are interchangeable with elastomeric O-rings. Learn more about H-Seal ...

Guaranteed 100% reliable
Interchangeable with Elastomeric O-Rings
Cryogenic to 500+° C
Sizes from 0.300" to 14"
Available in Nickel, Aluminum, Copper


All Seals Incorporated
The Sealing Specialists
2110 S. Yale Street
Santa Ana, CA 92704
Phone: (714) 556-4931
Fax: (714) 557-3257

SEALS › O-Rings

Epichlorohydrin (CO, ECO)

Epichlorohydrin is available in two types: the homopoly¬mer (CO) and the copolymer (ECO). Both CO and ECO have good resistance to mineral oils, fuels and ozone. The high temperature resistance is good. Compression set and the tendency to corrode metal sealing faces increase at 150°C (302°F). ECO has a good cold flexibility. CO has a high resistance to gas permeability.

Heat resistance
• Up to approximately 135°C (275°F)

Cold flexibility
• Down to approximately -40°C (-40°F)

Chemical resistance
• Mineral oil and grease
• Aliphatic hydrocarbons (propane, butane, fuel)
• Silicone oil and grease
• Water at room temperature
• Ozone, aging and weather resistant

Not compatible with
• Aromatic and chlorinated hydrocarbons
• Ketones and esters
• Non-flammable hydraulic fluids in the groups HFD-R and HFD-S
• Glycol based brake fluids




For immediate assistance - Call 800-553-5054
We can supply custom molded o-ring designs in any material and in virtually any shape or size. Send your drawings for quote or call to discuss product or material design perimeters with our engineering department.


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