an additive elastomeric manufactured part having an elongation at break of at least 50 % may be made by a method comprising the following . a material comprising a prepolymer and filler is first dispensed through a nozzle to form an extrudate deposited on a base . the base , nozzle or combination thereof is moved while dispensing the material so that there is horizontal displacement between the base and nozzle in a predetermined pattern to form an initial layer of the material on the base . subsequent layers are then formed on the initial layer by repeating the dispensing and movement on top of the initial layer and layers that follow .