This 90A Shore A durometer polyurethane (AU) hydraulic wiper seal delivers an optimal balance of flexibility and hardness for demanding rod exclusion applications. The firmer 90A compound provides superior resistance to extrusion and abrasion compared to softer urethane grades, making it the preferred choice for high-pressure hydraulic systems and environments with heavy particulate contamination.
Key Features
Material: Polyurethane (AU) — 90A Shore A durometer
Function: Rod wiper / excluder seal for hydraulic cylinders
Higher durometer provides enhanced extrusion resistance under elevated system pressures
Outstanding abrasion resistance for extended service life in contaminated environments
Compatible with mineral-based hydraulic oils and water-glycol fluids
Typical Applications
High-pressure hydraulic cylinders (mobile and industrial)
Construction, mining, and agricultural equipment
Heavy-duty material handling and lifting systems
Cylinders operating in abrasive or high-particulate environments
Machine tool and press cylinders
Operating Parameters
Durometer: 90A Shore A (±5)
Temperature Range: -40°F to +212°F (-40°C to +100°C)
Media: Mineral oil, water-glycol, water-in-oil emulsions
Not recommended for: phosphate ester fluids, ketones, strong acids, or steam
Sold as individual seals. Verify bore and rod dimensions before ordering to ensure proper fit. For softer compound options, see our 80A urethane wiper series.
