Choosing the right sealing material is critical to performance, uptime, and overall equipment life—especially in hydraulic systems exposed to high pressure, temperature extremes, and constant motion. Traditional thermoplastic polyurethanes (TPUs) perform well in many environments, but some applications demand greater strength, stability, and wear resistance.
Parker Hannifin’s Resilon® polyurethane family—including 4300, 4301, 4304, and 4700—is engineered for these high-demand applications. Built on advanced polymer chemistry and PPDI-based technology, Resilon® offers exceptional durability, rebound, and long-lasting sealing performance.
PPDI (p-phenylene diisocyanate) provides superior thermal stability, strong molecular bonding, and resistance to permanent deformation—making Resilon® ideal for extreme hydraulic environments.
If you’re evaluating materials for a challenging hydraulic system, contact Wyatt Seal to determine if Resilon® is the right solution.
Resilon® material Options
Resilon® is available in several formulations to meet different performance requirements:
- 4300: General-purpose PPDI formulation with strong durability, rebound, and heat resistance.
4301: Water-resistant version for environments exposed to moisture.
4304: Enhanced extrusion-resistant formulation for high-pressure systems.
4700: Premium high-performance formulation engineered for extreme durability, reduced wear, and long service life.
Material Properties at a Glance.
|
Property |
4300A90 |
4301A90 |
4304D60 |
4700A90 |
|
Hardness |
90A |
92A |
55D |
90A |
|
Tensile Strength |
8021 psi |
7188 psi |
6896 psi |
8300 psi |
|
Elongation |
638% |
548% |
571% |
650% |
|
Temp Range (Oil) |
-65°F to +275°F |
-35°F to +275°F |
-65°F to +275°F |
-65°F to +300°F |
|
Temp Range (Hot Water) |
n/a |
-35°F to +225°F |
n/a |
-35°F to +225°F |
|
Compression Set (158°F) |
61% |
41% |
46% |
38% |
Common Applications
Resilon® polyurethane seals are widely used across heavy-duty hydraulic systems, including:
- Hydraulic cylinders and actuators
- Engine rod and piston seals
- Shock absorbers
- Industrial machinery
- Construction and heavy equipment
These seals are designed to maintain integrity under high pressure, temperature swings, and rapid cyclic motion—reducing downtime and extending service life.
Why Partner with Wyatt Seal
Wyatt Seal offers expert guidance, engineering support, and access to all Resilon® formulations, helping you select the ideal seal for your system. Our team can assist with sizing, geometry, and custom solutions when standard seals aren’t enough. Connect with a Wyatt Seal expert to see how Resilon® 4300, 4301, 4304, or 4700 can improve performance and extend the life of your hydraulic equipment.
If you need help navigating this process to find the right seal for your project, talk to a seal expert at Wyatt Seal. We’ve spent 50 years building relationships with seal manufacturers worldwide to offer you access to thousands of seals, gaskets, O-rings, and other specialty items for any application.