Trelleborg EP678 is a medium temperature, low density syntactic epoxy tooling board designed for the manufacture of accurate and stable master models and molds.

Excellent dimensional stability

Maintains shape at elevated temperatures

Quick mold preparation

Exceptionally easy to machine

Suitable for use up to 135 °C

Can be directly used for the production of parts

Inert surface

Chemically compatible with tooling prepregs

Key Applications

EP678 offers many benefits and used for the following:

Master models

Lay-up tools for low and medium temperature curing epoxy prepreg

Light weight coring materials

EP678 Typical Properties




Density 708 kg/m³
Shore hardness  68 D  
Uniaxial compressive strength 52 MPa BS EN ISO 604 
HDT 135 °C
BS 2782
Glass transition temperature
125 °C
BS EN ISO 11359-2
Coefficient of thermal expansion
 37 x 10⁶ / °C BS EN ISO 11359-2
Flexural strength 34.3 MPa BS EN ISO  
Flexural modulus 2,483 MPa BS EN ISO 178
product sheet
Applied Technologies Tooling board

Local presence, global reach

How can we assist you?

Construction &Mining Equipment
Material Handling
Rail & Mass Transit
Agriculture & Forestry
Medical Devices & Life Sciences
Offshore Buoyancy & Seismic
Screen Printing
Buildings & Contruction
Marine Construction & Equipment
Processing Equipment

Boston, US

Address: 24 Teed Drive
Randolph, MA 02368
Phone: +1 774 719 1400

Show on map AppliedTechnologies@Trelleborg.com

Rochdale, UK

Address: Eagle Way, Off Queensway, Rochdale, Lancashire, OL11 1TQ, UK
Phone: +44(0) 1706 716610

Show on map AppliedTechnologies@Trelleborg.com