Vacuum Infusion process

Vacuum Infusion process

Zhermack range of silicone rubbers is specially formulated for use in the vacuum bagging processes now common in many areas of industry (automotive, marine, wind blade, etc.). Vacuum bagging is an increasingly common process in composite production. It uses an RTV2 poly addition silicone rubber bag to press elements into shape against the surface of a mould.

Vacuum allow to draw the resin into the molds and to press the membrane to reduce the thickness of the composites. The silicone reusable membrane can be used many times, without compromising a perfect fit surface finish to the formed part.

Product Benefits

  • High mechanical characteristics
  • High dimensional stability
  • Self bonding properties (a second layer can be cast within 24 h after casting the first layer)
  • Good chemical resistance against polyester, vinylester, etc
  • Perfect surfaces in both side of the mold;
  • Translucent product in order to recognize the filling of the resin;
  • NOTE: the suggestion is to keep thickness of 3-3,5 mm in order to allow the styrene to go through the membrane and increase the number of parts to reproduce
NameChemicalColourMixing ratioHardness (ShA)WT (@ 23°C)ST (@ 23°C)Tear (N/mm)Visc (cP)Smallest packStd packMedium packBig pack
ZA 25-6 SPRAY SELF BOND*RTV-2 Platinum cureLight blue1:1256’30’2680001 + 1 Kg5 + 5 kg25 + 25 Kg200 + 200 kg
ZA 26 WT 10 Spray Thixo Self **RTV-2 Platinum cureLight blue1:12510'1h20Thixona3 + 3 kg25 + 25 Kg200 + 200 kg

*Sprayable liquid silicone. Add the thixo agent to create a brushable product

**Sprayable and brushable thixo silicone

We suggest to keep thickness of 3-3,5 mm in order to allow the solvent to go through the membrane and increase the number of parts to reproduce

Information Request

Industrial

Search Product

Request catalogues and information about our products

Contact us