Steel Elastomer (S/E)

The steel elastomer gasket is a solid steel carrier with elastomeric beads chemically bonded to the edges and/or surfaces of the carrier.  Combustion sealing is achieved using a wire ring, multi-layer steel (MLS) feature or an interaction with the cylinder head, engine block and/or liner.

Features and benefits:  

• Steel body provides control of compressed gasket thickness.
• Carrier maintains joint stability by resisting thermal and mechanical stresses.
• Elastomeric seals are conformable, resilient and resistant to fluid degradation.
• Elastomeric beads require less clamping force to seal.
• Single gasket can contain multiple elastomeric compounds for localized sealing requirements.
• Controlled stress and strain increase life of the fluid seals.
• Engineered combustion and fluid seal creates efficient load balance across the gasket.

Multi-Layer Steel

MLS consists of multiple layers of stainless steel substrate with full or half embossments that give the layers function. This product can include a stopper at the combustion seal to limit motion and provide multistage gas sealing. Primary elastomeric coatings provide microsealing for the head, block and gasket layers. Secondary coatings enhance cold-seal capability, reduce friction and prevent sticking. 

Features and benefits:

• Requires lower clamp load to seal
• Decreases cylinder head gasket contribution to bore distortion
• Rigid body improves bolt load retention.
• Steel construction provides control of compressed gasket thickness.
• Robust design resists thermal and chemical attack.
• Active seal conformability and resiliency allow for higher flange deflections.
• Design permits flexibility to accommodate multiple piston-to-head clearances.

Graphite

A graphite cylinder head gasket is created by mechanically clinching an expanded graphite sheet to both sides of a perforated-steel carrier. Elastomeric grommets integrated into the gasket body further enhance fluid sealing. Mechanically attached rings or eyelets typically seal combustion. Secondary coating improves microsealing, prevents sticking and reduces friction.

Features and benefits:

• Effectively seals fluids
• Graphite provides thermal stability, low creep relaxation and chemical resistance.
• Compresses and conforms to accommodate rougher surface finishes

Fiber Composite — Solid Core

Fiber composite/solid core cylinder head gaskets consist of a non-asbestos fiber sheet chemically bonded to both sides of a solid steel carrier. Fluid sealing is enhanced by silk-screening elastomeric beads on the surface of the fiber and/or by incorporating elastomeric grommets in the design. Combustion sealing is achieved with wire rings or eyelets or by adding functionality to the solid steel carrier via embossments. Secondary coating technologies can be used for added properties, including microseal, antifriction and antistick.

Features and benefits:

• Effective fluid sealability
• Improved load distribution over perforated core technology
• Improved blowout resistance and strength via a “solid core”
• Ability to customize compressed thickness via steel core and fiber sheet thickness
• High compatibility with additional sealing aids such as Printoseal, coatings, eyelets, grommets, etc.

Fiber Composite — Perforated Core

Fiber composite/perforated core cylinder head gaskets consist of a non-asbestos fiber sheet mechanically clinched to both sides of a perforated steel carrier. Fluid sealing is enhanced by silk-screening elastomeric beads on the surface of the fiber and/or by incorporating elastomeric grommets in the design. Combustion sealing is achieved with wire rings or stainless steel eyelets wrapped onto the gasket body at the combustion opening. Secondary coating technologies can be used for added properties, including microseal, antifriction and antistick.

• Mechanically locking fiber sheet enhances extrusion resistance
• Use of different core materials (e.g., stainless steel) enables design solutions tailored to the application
• Various fiber sheet thicknesses to obtain compressed thickness requirements
• Ease of manufacturing