ESSTool™-350 is a new, high-temperature epoxy syntactic tooling board for the aerospace, automotive and marine sectors. Designed for use at temperatures up to 350°F (176°C), ESSTool-350 board has an extremely low coefficient of thermal expansion to produce models, tools and parts with accuracy and dimensional stability.

Color: light grey

Standard dimensions: 24″ x 60″

Thickness: 1″ / 2 / 3 / 4 / 5 / 6 (25mm / 51 / 76 / 102 / 127 / 152)

Custom cutting services available

Mechanical & Thermal Properties
PropertyValueUnits (IMP)ValueUnits (SI)ASTM Method
Shore Hardness85D85DD2240
Uniaxial Compressive Strength (max)17,100psi117.8MPaD695
Unaxial Compressive Modulus480psi3,310MPaD695
Tensile StrengthTBDpsiTBDMPaD638
Tensile ModulusTBDksiTBDMPaD638
Flexural Strength6,787psi46.8MPaD790
Flexural Modulus588ksi4,054MPaD790
Flexural Toughness4.46psi30.7KPaD790
Shear StrengthTBDpsiTBDMPaD732
Coefficient of Thermal Expansion (RT – 350F)14.0 x 10^-6in/in/F25.2 x 10^-6m/m/CE228
Thermal Conductivity1.15BTU in/hr ft2 F0.165W/m-K
Heat Deflection Temperature (264 psi)>460F>238CD648