Loctite E-3955 FST HH

Loctite Engineering Grade products are high performance fluids developed to be highly consistent with extraordinary attributes.  Loctite E-3955 FST HH is a high performance, high modulus product which boasts excellent flexural and tensile properties with outstanding flame retardance.  E-3955 FST HH displays high HDT, enabling it to be used in harsh environments without deformation or deflection. It passes flammability standards such as UL94 V-0 and AirBus AITM2-0002.  E-3955FST HH has been tested in QUV exterior weathering conditions (ASTM G-154-Cycle 1) for 1600 hours with less than a 15% change in flexural properties.

Physical Properties

Tensile Stress at Break

77 MPa

Young's Modulus

3673 MPa

Elongation at Failure


Flexural Stress at Break

138 MPa

Flexural Modulus

5200 MPa

Flexural Strain at Break


Heat Deflection Temperature at 0.455 MPa (Green)


Heat Deflection Temperature at 0.455 MPa


Heat Deflection Temperature at 1.82 MPa


Viscosity @ 65°C

800-1100 cP @ 25°C

Recommended Machines