Property

Greatest

Least

Hardness

--

--

Tensile Strength

Ester

Ether

Elongation

--

--

Modulus

--

--

Tear Strength

Ester

Low Cost Ether

Compression Set

TDI

MDI

Rebound

MDI Ether

TDI Ether

Low Temperature Properties

MDI Ether

TDI Ester

High Temperature Properties

TDI

MDI

Abrasion Resistance:
-sliding
-impingement

Ester
MDI Ether

Low Cost Ether

Heat Buildup

Ether

Ester

Hydrolysis Resistance

MDI Ether

TDI Ester

Oil Resistance

Ester

Ether

Heat Aging

Ester

Low Cost Ether