ZA13 MOULD WT 45 is a bi-component addition cured RTV silicone rubber, particularly recommended for making object in polyester resins and concrete.
Compatible with all plasters, coatings, polyurethane resins, acrylic resins and polyester resins.
Main application sectors
Mould making and model-making due to its considerable precision in reproduction, high dimensional stability and high mechanical resistance
Artistic ceramics due to its high dimensional stability, considerable fluidity and good mechanical resistance
Concrete Moulding due to its considerable precision in reproduction, high dimensional stability and high mechanical resistance
Chemical and physical characteristics
| Zhermack ZA13 | Unit |
| Mix Ratio By Weight | 1A : 1B |
| Density | 1.07 g/cc |
| Viscosity Of Pre-Catalysed Mix | 4500 ± 500 cP |
| Mixing Time @ 23°C | 1 min |
| Working Time @ 23°C | 40 - 50 mins |
| Setting Time @ 23°C | 2.5 - 3 hrs |
| Shore A Hardness | A13 |
| Tensile Strength | 3.0 ± 0.2 N/mm² |
| Elongation At Break | 450 ± 20% |
| Tear Resistance Die B | 14 ± 1 N/mm |
| Tear Resistance Die C | 9 ± 1 N/mm |
| Cure Colour | Translucent |
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.
