Polyurethane with Real Seal - High performance Seals-Hydraulic seals, valve seals, etc.

Real Seal has developed a reputation for being one of the premiere urethane product suppliers in the market. Becoming the industry standard for physical toughness, polyurethane sees active service in applications requiring resistance to abrasion, tear, and high tensile strength.

Urethanes possess a unique molecular structure of tight bonds between soft polyol segments and hard isocyanate segments, creating a strong but flexible elastomeric backbone. Polyurethanes are also unique in that they have a number of serviceable forms, from low strength liquids to highly cross-linked thermoplastics.

Real Seal commonly handles the two most often used in the sealing industry; Thermosetting and Thermoplastic.

The chemical type of the polyol backbone used when compounding polyurethane material is one of the two major contributors to it's physical properties and relative chemical resistances. These are three types normally utilized:

Polyester Based: The most commonly used, providing excellent mechanical properties with resistance to hydrocarbon oils and hydraulic oils. Most urethane seals are based on polyesters.

Polyether Based: Compounded for better hydrolytic stability and good low temperature properties while maintaining the other excellent properties that urethane possesses.

Polycaprilactone Based: A subgroup of polyesters, polycaprilactones impart some of the hydrolysis resistance and low temp properties of the polyethers to the outstanding oil resistance and mechanical properties of polyesters.

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