Industries Served
At McMasters Koss, we’re proud to support a wide range of industries with reliable sealing solutions. From the automotive and heavy truck markets to pool and spa systems, hydraulics, beverage dispensing, oil & gas, and even aerospace—we help keep critical systems running smoothly. Wherever performance and dependability matter, we’re here to help.
- NVH Isolators & Grommets
- O-Rings
- Hoses & Ducts
- Rubber-to-Metal Bonded Gaskets
- Oil Seals
NVH Isolators & Grommets
NVH Isolators & Grommets
O-Rings
Hoses & Ducts
Rubber-to-Metal Bonded Gaskets
Oil Seals
- O-Rings
- Custom Gaskets
- NVH Dampeners/Isolators
- Push-in-Place Gaskets
- Oil Seals
- Rubber-to-Metal Gaskets
O-Rings
O-Rings
O-Rings
O-Rings
Custom Gaskets
Custom Gaskets
NVH Dampeners/Isolators
NVH Dampeners/Isolators
NVH Dampeners/Isolators
Push-in-place Gaskets
Push-in-place Gaskets
Oil Seals
Oil Seals
Rubber-to-Metal Gaskets
- O-Rings
- Overmolded Air Poppet Seals
- Hydraulic/Pneumatic Seals
- Fabric-Reinforced Diaphragms
- NVH/Grommets/Isolators
- Oil Seals
- Hoses/Breather Tubes
- Dust Boots
- TPMS Seals
O-Rings
O-Rings
O-Rings
Overmolded Air Poppet Seals
Overmolded Air Poppet Seals
Hydraulic/Pneumatic Seals
Fabric-Reinforced Diaphragms
NVH/Grommets/Isolators
NVH/Grommets/Isolators
NVH/Grommets/Isolators
Oil Seals
Oil Seals
Oil Seals
Hoses/Breather Tubes
Dust Boots
Dust Boots
TPMS Seals
TPMS Seals
TPMS Seals
TPMS Seals
- Custom Molded Gaskets
- NSF/WRAS/ACS-Certified O-Rings
- UL-rated Enclosure
- Custom Molded Grommets & Isolators
- Shaft Seals
Custom Molde Gaskets
Custom Molded Gaskets
NSF/WRAS/ACS-Certified O-Rings
NSF/WRAS/ACS-Certified O-Rings
UL-rated Enclosure Gaskets
UL-rated Enclosure Gaskets
Custom Molded Grommets & Isolators
Shaft Seals
- Spring-Energized Hydraulic Seals
- Machined Polymer Piston Assemblies
- O-Rings
- Engineered Polymer Contamination Excluders
- Oil Seals
Spring-Energized Hydraulic Seals
Machined Polymer Piston Assemblies
O-Rings
O-Rings
O-Rings
Engineered Polymer Contamination Excluders
Oil Seals
Medical Diagnostic Equipment and Test Equipment Require sterile sealing components and compliance with FDA, NSF and USP Class VI Medical requirements.
Please reach out to our sales engineering team to determine regulatory requirements that would apply to your application.
McMasters Koss has worked on component sealing within the petroleum and natural gas industries supplying O-Rings seals for fittings, pumps, valves and control devices in surface, oceanic and deep hole applications.
McMasters Koss offers a variety of Elastomers meeting NORSOK and Nace Rapid Gas Decompression (RGD) requirements.
- Oil Seals
- Die-cut Gaskets
- Bonded Gaskets
- Mechanical Seals
Oil Seals
Oil Seals
Oil Seals
Die-cut Gaskets
Die-cut Gaskets
Bonded Gaskets
Bonded Gaskets
Bonded Gaskets
Mechanical Seals
Mechanical Seals
- Sanitary Tri-Clamp Gaskets
- FDA Compliant O-Rings
- Die-cut and Custom-molded Gaskets
Sanitary Tri-Clamp Gaskets
Sanitary Tri-Clamp Gaskets
FDA-Compliant O-Rings
FDA-Compliant O-Rings
FDA-Compliant O-Rings
Die-cut and Custom-molded Gaskets
Die-cut and Custom-molded Gaskets
Die-cut and Custom-molded Gaskets
Die-cut and Custom-molded Gaskets
- Thermoplastic hydraulic Seals
- Wipers & Wear bands
- O-Rings
- NVH Sleeves & Isolators
- Rubber-coated Metal Pump Gaskets
- Rubber-to-Metal Bonded Seals
Thermoplastic hydraulic Seals
Thermoplastic hydraulic Seals
Thermoplastic hydraulic Seals
Thermoplastic hydraulic Seals
Wipers & Wear Bands
Wipers & Wear Bands
Wipers & Wear Bands
Wipers & Wear Bands
O-Rings
NVH Sleeves & Isolators
Rubber-coated Metal Pump Gaskets
Rubber-to-Metal Bonded Seals
- O-Rings
- Umbrella Valves
- Duckbill Valves
- Custom Gaskets
O-Rings
O-Rings
Umbrella Valves
Duckbill Valves
Custom Gaskets