Castaldo “VLT” Rubber

It is a silicone rubber designed to be cured at a low temperature of 71°C, making it ideal for producing molds suitable for direct transition from CAD/CAM environments to mass production.

VLT can be used with traditional modeling waxes as well as with resins and/or waxes produced by CAD/CAM machines.

 

Depending on the material and shape of the model, VLT Silicone Rubber offers different curing temperature and time combinations.

Below are the recommended values for a classic mold with a thickness of 19 mm.

 

30 minutes at 88°C
45 minutes at 82°C
60 minutes at 76°C
90 minutes at 71°C

 

In general, lower curing temperatures result in less shrinkage, while higher temperatures cause increased shrinkage.

The typical shrinkage rate is approximately 0.1% at 88°C.

 

Technical Specifications

Shore A hardness : 38 – 40
Tensile Strength : 8.9 N/mm² / 1289 psi
Curing (Vulcanization) Temperature : 71°–88°C
Tear Strength : 18.2 N/mm / 104 lbs./in.
Shrinkage : Very low / 0.1%
Elongation : 614%
Color : Turquoise blue

 

Available packaging options are:

2.27 kg strips (45.7 × 7.3 cm) and
1 kg sheets in 30 × 30 cm square form.

 

For more information, please refer to the PDF documents below or visit
https://www.castaldo.com/english/use/u_vlt/u_vlt.html