Zhermack, Italian specialist in professional silicones Zhermack Group from Badia Polesine supplies silicone elastomers for the dental, industrial and medical sectors. Our webshop carries two lines, both addition cure with a platinum catalyst and a 1:1 mix ratio by weight: ✓ Mould line (ZA and HT): pourable silicones for mould...
Zhermack Silicones - Platinum Addition Cure Silicones for Mould Making, SFX and Bodycasting (9)
Zhermack, Italian specialist in professional silicones
Zhermack Group from Badia Polesine supplies silicone elastomers for the dental, industrial and medical sectors. Our webshop carries two lines, both addition cure with a platinum catalyst and a 1:1 mix ratio by weight:
- ✓ Mould line (ZA and HT): pourable silicones for mould making, concrete and artificial stone, prototyping and moulds for plaster, polyurethane and acrylic resins. From Shore A 13 to Shore A 45.
- ✓ SFX line: ultra soft and brushable silicones for special effects, masks, prostheses, animatronics and bodycasting.
Zhermack silicones for mould making
| Product | Hardness | Colour | Working time | Demould | Tear strength | Elongation at break |
|---|---|---|---|---|---|---|
| ZA 13 Mould WT 45 | Shore A 13 | Translucent | 45 min | about 8 hours | 12 N/mm | 440 % |
| ZA 10 Orange | Shore A 13 | Orange | 15 min | 120 min | 14 N/mm | 350 % |
| ZA 22 Mould | Shore A 22 | Blue | 15 min | 90 min | 20 N/mm | 480 % |
| HT 33 Translucent | Shore A 33 | Translucent | 20 min | 3.5 hours | 20 N/mm | 460 % |
| HT 45 Translucent | Shore A 45 | Translucent | 12 min | 2.5 hours | 15 N/mm | 250 % |
Zhermack ZA 13 Mould WT 45, Shore A 13
ZA 13 Mould WT 45 is the softest mould silicone with the longest working time: 45 minutes at 23 °C. That leaves room to de-air calmly and to pour larger moulds in one go. Low viscosity (4,500 mPa s), translucent, and besides mould making and concrete also used for podiatry and orthopaedic impressions. Allow about 8 hours before demoulding.
Zhermack ZA 10 Orange, Shore A 13
ZA 10 Orange has the same hardness as ZA 13 Mould but works much faster: 15 minutes working time and demoulding after 120 minutes. The choice for flexible reproduction moulds for PU and acrylic resins, plaster, props and set building when you want to keep moving.
Zhermack ZA 22 Mould, Shore A 22
ZA 22 Mould is the workhorse of the range. Tear strength 20 N/mm at 480 % elongation, shrink free cure, good flow and ready to demould after 90 minutes. The blue colour gives high contrast with plaster and concrete. Suitable for concrete casting, artificial stone, sanitaryware and building elements.
Zhermack HT 33 Translucent, Shore A 33
HT 33 Translucent combines a firmer, dimensionally stable mould with the same high tear strength of 20 N/mm and 460 % elongation. Translucent, so you can see the model through the mould. For precision parts, jewellery, artificial stone and concrete moulds that must hold their shape.
Zhermack HT 45 Translucent, Shore A 45
HT 45 Translucent is the hardest of the range. At Shore A 45 the mould barely deforms during casting, which makes it suitable for small, highly detailed objects with thin walls, jewellery and rapid prototyping. Elongation at break is lower at 250 %, so it is less suited to deep undercuts.
Zhermack silicones for SFX, prosthetics and bodycasting
⚠️ Biocompatible is a property of the product, not of the brand
Zhermack had one biocompatibility study carried out under ISO 10993-1, and it covers exactly two products: ZA SFX 0020 and ZA SFX 10 WT 10. Both were assessed as a surface medical device for contact with intact skin at prolonged contact of more than 30 days, and for contact with mucosal membrane up to 24 hours. Testing covered cytotoxicity (ISO 10993-5), sensitisation (ISO 10993-10) and skin irritation (ISO 10993-23), with no relevant biological effects. The study was completed in August 2023.
SFX 00-30, SkinForm and all silicones in the mould line (ZA 10, ZA 13, ZA 22, HT 33 and HT 45) were not part of that study. We therefore do not call those products biocompatible. The assessment also applies to the material as Zhermack supplies it, not to your finished part: pigment, softener, Deadner, release agent and degree of cure all influence the result. If you are making a medical device, have the cured end product tested by an accredited laboratory.
| Product | Hardness | Working time | Demould | Elongation at break | ISO 10993 assessed |
|---|---|---|---|---|---|
| ZA SFX 10 WT 10 | Shore A 10 | 12 min | 40 min | 650 % | Yes |
| SFX 00-20 | Shore 00-20 | 25 min | 70 min | 770 % | Yes |
| SFX 00-30 | Shore 00-30 | 25 min | about 110 min | about 850 % | No |
| SkinForm | Shore A 22, brushable | 10 min | 25 min | 360 % | No |
Zhermack ZA SFX 10 WT 10, Shore A 10
The firmer of the two assessed products. ZA SFX 10 WT 10 holds its shape better than the 00 range at Shore A 10, which makes it the choice for thicker appliances, prostheses and parts that carry load. Tear strength 14 N/mm at 650 % elongation, viscosity 10,000 mPa s. Can be softened with Deadner.
Zhermack SFX 00-20, Shore 00-20
The softest and most stretchable in the SFX line, and like ZA SFX 10 assessed under ISO 10993-1. At 770 % elongation at break and Shore 00-20, SFX 00-20 comes close to the feel of tissue. Tensile strength 1.2 N/mm2, tear strength 3.5 N/mm (Die B), viscosity 5,200 mPa s. Translucent, so easy to pigment and flock.
Zhermack SFX 00-30, Shore 00-30
SFX 00-30 is the slightly firmer version of 00-20. Still ultra soft and highly stretchable, but more dimensionally stable, so larger masks and doll skins hold their shape better. Tear strength 4 N/mm, viscosity 6,000 mPa s. Not included in the biocompatibility study, so our choice for work without prolonged skin contact.
Zhermack SkinForm, ZA 22 Thixo Body
The only brushable Zhermack silicone. SkinForm is thixotropic and stays on vertical surfaces without running, which suits moulding of face, hands and torso. Shore A 22, tear strength 14 N/mm, 10 minutes working time and careful demoulding after about 25 minutes. Always work with a plaster bandage support shell.
What are Zhermack silicones used for?
- ✓ Mould making, core moulds and rapid prototyping
- ✓ Concrete moulds, artificial stone, sanitaryware and building elements
- ✓ Moulds for plaster, coatings, polyurethane and acrylic resins
- ✓ Jewellery and small precision parts
- ✓ Special effects make-up, appliances and film prosthetics
- ✓ Masks, cosplay, props and set building
- ✓ Animatronics, robotics and dolls
- ✓ Bodycasting and lifecasting
- ✓ Medical simulation models and training phantoms
Working with Zhermack addition cure silicones
- ✓ All Zhermack silicones in our range mix 1:1 by weight, a deviation of up to 5 % does not noticeably change the result.
- ✓ The platinum catalyst is in the CATALYST component. Only use base and catalyst together when they carry the same batch number, and never swap the caps.
- ✓ Platinum silicones can be poisoned by sulphur bearing clay, latex, PVC, condensation cure silicones, uncured polyurethane and epoxy, cyanoacrylate, vaseline oil and many SLA 3D prints. Test on a small scale or use a PVA barrier layer.
- ✓ At 40 °C working time and setting time roughly halve. At 4 °C working time doubles and curing takes about three times as long.
- ✓ Preferably de-air under vacuum and pour from about 30 cm height, so air bubbles stretch and break.
- ✓ A new layer can be poured onto a previous one within 24 hours: it bonds to the first.
- ✓ The SFX line can be softened with Deadner to a gel like consistency.
- ✓ Shelf life 12 to 18 months depending on the product, when stored between 5 °C and 27 °C.
Zhermack documentation
The documents below come directly from Zhermack and are in English.
Zhermack Silicones for Healthcare, biocompatibility flyer for ZA SFX 0020 and ZA SFX 10 WT 10
Zhermack Industrial Brochure, full overview of the industrial silicones with technical tables
Not sure which Zhermack silicone you need?
Tell us what you want to cast, in which material and how often, or what kind of skin contact is involved. We will advise which product fits and which documentation does and does not exist. Email us at info@siliconesandmore.com.