ZA 22 Mould suitable for the casting of final products manufactured in the form of ZA 22 Mould, you can use moulding materials based on polyurethane, polyester and epoxy resins, gypsum, both conventional and polymer, various types of concrete, the mixture for the production of ceramics, and other similar materials.
ZA 22 Mould in primary form, is RTV silicone rubber, consisting of two components (base and catalyst), which is cured at room temperature.
| Zhermack ZA22 Mould Silicone | Unit |
| Mix Ratio By Weight | 1A : 1B |
| Mixing Time @ 23°C | 1 min |
| Working Time @ 23°C | 14 - 17 mins |
| Cure Time @ 23°C | 1 hr |
| Viscosity Of Pre-Catalysed Mix | 4000 ± 300 cP |
| Shore A Hardness After 24 Hours | 21 ± 2 ShA |
| Tensile Strength | 4.0 ± 0.2 N/mm² |
| Elongation At Break | 380 ± 20% |
| Tear Resistance (Die B) | 20 ± 1 N/mm |
| Tear Resistance (Die C) | 12 ± 1 N/mm |
| Cure Colour | Blue |
Inhibition of Cure
Great care must be taken when handling and mixing all addition-cured silicone elastomer systems, that all the mixing tools (vessels and spatulas) are clean and constructed in materials which do not interfere with the curing mechanism, do not use wood and paper mixing utensils. The cure of the rubber can be inhibited by the presence of compounds of nitrogen, sulphur, phosphorus and arsenic; organotin catalysts and PVC stabilisers, epoxy resin catalysts and even contact with materials containing certain of these substances e.g.. moulding clays, sulphur vulcanised rubbers, condensation cure silicone rubbers, wood, paper, cardboard, onion and garlic.
Base and catalyst use universal containers for various kit sizes and are supplied by weight, while the supplied containers may not be full, they will contain the correct amount of both base and hardener according to the listing.
