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FE-251-U

Technical Datasheet | Supplied by Shin-Etsu

FE-251-U is a fluorosilicone rubber by Shin-Etsu, containing 0.8 of C-8A curing agent. It is highly resistant to high & low temperatures, solvents, oil, flex fatigue and silicone fluids. Shows excellent workability. FE-251-U is suitable for processing by compression moldng. Used in flame-resistant diaphragms, check valves, gaskets and O-rings.

FE-251-U Properties

Mechanical Properties

Value & Unit

Test Condition

Test Method

Tensile Strength

9.8 MPa

(Press cure- 165°C x 10 min, Post cure- 200°C x 4hrs)

100% Modulus

1.9 MPa

(Press cure- 165°C x 10 min, Post cure- 200°C x 4hrs)

200% Modulus

4.4 MPa

(Press cure- 165°C x 10 min, Post cure- 200°C x 4hrs)

Compression Molding Properties

Value & Unit

Test Condition

Test Method

Compression Molding Temperature

165 - 170 °C

Molding Time (5-10 mm thickness)

15 - 30 min

Molding Time (10-25 mm thickness)

30 - 60 min

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FE-251-U

FE-251-U Properties

Mechanical Properties

FE-251-U Processing Guidelines

Compression Molding Properties