Garlock High Temperature Gaskets
GRAPH-LOCK® 3125TC Flexible Graphite Gasketing

Laminated graphite sheet with a 316SS tang insert: It has laminated layers of 0.015″ purified natural graphite flake that have been acid washed, expanded under heat, and then compressed into sheets with a minimum graphite content of 98%. This sheet contains a 0.004” thick 316 stainless steel tang insert (36 tangs/sq in.) bonded with a proprietary adhesive.
Application
- Excellent resistance
- Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure, and aggressive chemicals
- Proven fire-safe
- Reliable
- Seals easily under moderate bolt load, offers superior torque retention
- Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations
Specifications
- Available in sheet and cut gasket form
- Min. Temperature: -240°C (-400°F)
- Max. Temperature: 454°C (850°F)
- Max. Pressure: bar (psi) 138 (2,000)
Spec Sheet: Garlock Graph-Lock Style 3125TC (pdf)
GRAPH-LOCK® 3125SS Flexible Graphite Gasketing

Laminated graphite sheet with a 3125SS foil insert: GRAPH-LOCK® 3125SS has laminated layers of 0.015″ purified natural graphite flake that have been acid washed, expanded under heat and then compressed into sheets with a minimum graphite content of 98%. This sheet contains a 0.002” thick 316 stainless steel foil insert, bonded with a proprietary adhesive.
Features and Benefits
- Excellent resistance
- Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure, and aggressive chemicals
- Proven fire-safe
- Reliable
- Seals easily under moderate bolt load, offers superior torque retention
- Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations
Specifications
- Available in sheet and cut gasket form
- Min. Temperature: -240°C (-400°F)
- Max. Temperature: 454°C (850°F)
- Max. Pressure: bar (psi) 138 (2,000)
Spec Sheet: More: Garlock Graph-Lock Style 3125SS (pdf)
GRAPH-LOCK® 3123 / 3125 Flexible Graphite Gasketing

Purified graphite sheet flexible graphite gasketing: The graphite flake has been acid washed, expanded under heat, and then compressed into sheets with a minimum graphite content of 98%. For thicknesses under 1/16” homogenous graphite is used. For thicknesses over 1/16” laminated graphite is used.
Application
- Excellent resistance
- Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure and aggressive chemicals
- Proven fire-safe
- Reliable
- Seals easily under moderate bolt load, offers superior torque retention
- Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations
Specifications
- Available in cut sheet or cut gasket form
- Min. Temperature: -240°C (-400°F)
- Max. Temperature: 454°C (850°F)
- Max. Pressure: bar (psi) 138 (2,000)
Tech Spec: Garlock Graph-Lock Style 3123-3125 Spec Sheet (pdf)
GRAPH-LOCK® 3128 HOCHDRUCK® Flexible Graphite Gasketing
Multi-layer graphite with 316SS inserts: GRAPH-LOCK® 3128 HOCHDRUCK® is a multi-layer, high strength sheet material composed of .020” thick layers of high purity flexible graphite (carbon >99.85%) and .002” thick layers of 316 stainless steel foil insert. It provides high compressive strength, blow-out resistance, excellent handling properties, and improved tightness. Depending on the sheet thickness, several layers of graphite and stainless steel are bonded together in a proprietary process; no adhesive is used. Maximum ash content is 0.15%.
Features and Benefits
- Excellent resistance
- Pure exfoliated graphite flake material excels in extreme conditions, withstanding heat, pressure, and aggressive chemicals
- Proven fire-safe
- Reliable
- Seals easily under moderate bolt load, offers superior torque retention
- Retains dimensional stability in high temperatures; seals tightly even during pressure fluctuations
Specifications
- Available in sheet or cut gasket form
- Min. Temperature: -240°C (-400°F)
- Max. Temperature: 454°C (850°F)
- Max. Pressure: bar (psi) 138 (2,000)
Spec Sheet: Garlock Graph-Lock Style 3128 Hochdruck (pdf)
Style 9800 High Temp Gasketing

Style 9800 gasket is a high temperature gasketing composed of carbon fibers with an SBR binder. This high-performance material maintains its seal during pressure and temperature fluctuations, reducing leakage rates and maintenance time.
Application
- Saturated steam*
- Water
- Inert gases
Specifications
- Min Temperature: -73°C (-100°F)
- Max Temperature: 482°C (900°F)
- Max Continuous Temperature: 343°C (650°F)
- Max Pressure: bar (psi) 138 (2000)
Tech Spec: Garlock High Temp Style 9800 spec sheet (pdf)
Style 9850 High Temp Gasketing

Style 9850 gasket is composed of carbon fibers with a nitrile binder. This high temperature gasket has a long-lasting seal, which minimizes cold flow and creep relaxation problems.
Application
- Saturated Steam*
- oils
- gasoline
- water
- aliphatic hydrocarbons
- most refrigerants
Specifications
- Min. Temperature: -73°C (-100°F)
- Max. Temperature: 482°C (900°F)
- Continuous Max: 343°C (650°F)
- Max. Pressure: bar (psi) 138 (2000)
Spec Sheet: Garlock High Temp Style 9850 (pdf)
Style 9900 High Temp Gasketing

Style 9900 gasket is composed of graphite fibers with a nitrile binder, allowing it to withstand extreme conditions. This high temperature gasket has passed Garlock® fire tests and is ABS Fire Safe Type Approved
Application
- Steam*
- Oil
- Grease
- Water
Specifications
- Min Temperature: -73°C (-100°F)
- Max Temperature: 537°C (1000°F)
- Max Continuous Temperature: 343°C (650°F)
- Max Pressure: bar (psi) 138 (2,000)
Spec Sheet: Garock High Temp Style 9900 High Temp (pdf)
THERMa-PUR™ 4122 **
THERMa-PUR™ is a proprietary new gasketing material designed for use in high temperature sealing applications. It is produced using an environmentally friendly solvent-free process and combines a unique formulation with a patent-pending fiber core. THERMa-PUR™ is yet another innovative Garlock Sealing Technologies sealing solution that provides more than just temperature resistance.
Applications
- Marine and Land-based Exhaust Systems
- Biomass Gasification Process
- Oil and Gas Production
- Mineral and Fertilizer Processing
- Incineration Process
- Co-generation Systems
- Turbochargers Equipment
- Process Drying Equipment
Specifications
- Max. Continuous Temperature: 1000°C (1832°F)
- Max. Pressure: bar (psig) 34.5 (500)