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Polycraft ZA22 Mould RTV Addition Cure Mould Making Silicone Rubber

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(£15.83 Exc. VAT)
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Addition Cure

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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.

Technical & Safety Sheets
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1 Review:

excellent service and product
28 June 2020  | 

Excellent service- my order arrived 5 days earlier than the stated delivery day and the product is also of high quality. It is the first time using silicon rubber and I found it to be very easy to use and it also cures fairly fast. The shape of the containers though (2 kg) makes it a bit difficult to get all the silicone out when it is little left in it. But that won't stop me from ordering it again and highly recommending this product.

5 of 5 people found this review helpful.
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Polycraft ZA22 Mould RTV Addition Cure Mould Making Silicone Rubber