Vacuum casting is ideal for duplicating models and producing sufficient elastomer components. Starting from a master model, a silicone mold is created, which is then used to duplicate parts made of polyurethane rubber.

Fundamentally, two different types of rubber material are available. An amber-colored rubber, which is then typically colored black. Elongations at break of up to 400% and higher are feasible with cast components.
The second option is a transparent material. Unfortunately, its elongation-at-break properties are worse than those of the amber-colored rubber. However, its advantage is its colorability or, if desired, the feasibility of a transparent elastomer component.

Typical applications

All kinds of soft parts with a hardness of 35–100 Shore A (available in 5-Shore increments). Functional prototypes for all applications cast in near-series material, which will subsequently be manufactured from EPDM, silicone or TPE. Whether vehicle seals, bellows, housing seals or soft-part components on hard parts – almost anything is possible with this technology.

flexible rubber hose
Vacuum-cast rubber, colored
Nearly all desired colors are possible.
Rubber gasket
Thick or thin, simple or complex – rubber is versatile.
intricate rubber gasket
Intricate gaskets – rubber makes this possible.
Vacuum-cast multi-component part in rubber
Multi-component parts in rubber? No problem!
Vacuum casting: silicone and rubber – so many possibilities
Flexibility not only in terms of the material, but also the colors, shapes ... and the number of pieces.
complex part made of silicone
complex silicone part.
Vacuum casting production hall
This is where the final touch is applied to your prototype.

Soft parts in silicone and rubber

1zu1 can now also produce flexible parts, such as hoses or seals made of silicone, as food-grade variants – in any color and with a Shore hardness from 10 A to 70 A.

Elastomer materials (PU rubber) of varying hardness (from 35 – 100 Shore A) are available. For materials similar to thermoplastics, a hardness of 45–85 Shore D can be selected. Typical areas of application include housings, covers, gaskets, covers for vehicle apparatus construction, foundry models, model and prototype construction, mold tubes, hoses ...

Shore A 30 40 50 60 70 80 90 95        
Shore D             45 55 60 65 70 80