QM 272 – Shore 70A Platinum Silicone for Rubber Rollers & Concrete Molds
QM 272 – Shore 70A Platinum Silicone for Rubber Rollers & Concrete Molds
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Premium Platinum Silicone for Professional Applications
QM 272 is a two-component, platinum-catalyzed silicone rubber from CHT Germany, specially developed for making hard, durable molds with a shore hardness of 70 A (after heating). This high-performance silicone offers excellent chemical resistance, dimensional stability, and fast demoulding time, ideal for demanding production environments and industrial applications.
Key Benefits
- High hardness (Shore 70 A): Ideal for rubber rollers and applications requiring stiffness
- Excellent chemical resistance: Resistant to aggressive materials such as epoxy, polyester and casting resins
- Fast demoulding time (8-12 hours): Increased productivity and shorter cycle times
- Dimensionally stable (<0.1% shrinkage): Accurate reproduction of details and geometries
- High tear strength (15.7 N/mm): Durable molds with a long service life, even with intensive use
- Wide temperature range (-55°C to 204°C): Suitable for various production conditions
Typical Applications
- Rubber Rolls: Production of structured rolls for industrial processes
- Architectural replication: Molds for facade elements, ornaments and decorative concrete products
- Furniture industry: Reproduction of moldings, mouldings and decorative elements
- Rapid prototyping: Hard molds for functional prototypes and small series
- Frames and borders: Production of decorative frames and borders
- Composites and Plastics: Chemically Resistant Molds for Aggressive Resin Systems
Technical Features
QM 272 is supplied as a two-component system with a mixing ratio of 10:1 by weight (A:B). The pot life is approximately 60 minutes at 25°C, with a demoulding time of 8-12 hours at room temperature. For optimal performance, heating is recommended: 30 minutes at 150°C produces a shore hardness of 70 A. The cured silicone has a tensile strength of 5.52 N/mm² (800 psi) and an elongation of 100%, providing excellent mechanical properties.
CHT Germany is a leading specialist in high-performance silicone technology for industrial and professional applications, with decades of experience in mold-making materials.
Professional Support
Our technical advisors are ready to support you with material selection, processing techniques, and optimizing your production process. Contact us for project-specific advice and technical documentation.
Product Properties
- Hardness70Shore AHardness of the silicone material
- ColorBeigeColor of the finished product
- Viscosity35000mPa·sViscosity of the uncured silicone
- Mix ratio10:1Mixing ratio A : B
- Tensile strength5.52MPaMaximum tensile force before breaking
- Tear strength15.7kN/mResistance against tearing
- Elongation at break100%Maximum stretch before breaking
- Pot life60minutesWorking time after mixing
- Cure time720minutesTime until full cure
Component Properties
- Color ABeigeColor of component A
- Color BClear/HazyColor of component B
- Viscosity A45000mPa·sViscosity of component A
- Viscosity B2500mPa·sViscosity of component B
- Viscosity (mix)35000mPa·sViscosity of the mixture
- Density A1.28g/cm³Density of component A
- Density B1.02g/cm³Density of component B
Electrical Properties
- Electrically insulatingYesPrevents electric current flow
Certification & Safety
- Chemical resistanceyesResistance to chemicals
Application
- Use caseArchitectural replicas, furniture, picture frames, prototypes, rubber rollers, textured rubber rollersIntended use
- Silicone type["Addition curing","RTV-2"]Type of silicone or polymer
- Cure speedNormalHow quickly the material can be demoulded
- Cure conditionRoom temperature or heatCondition under which the material cures
Technical data sheets
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Frequently asked questions
What is the delivery time for my order?
Orders placed and paid on working days are in most cases shipped the same day. Weekend orders are processed on the next working day.
Indicative delivery times: Netherlands usually within 1 working day, Belgium and Germany typically 1–2 working days, other countries depending on destination and carrier. These are guidelines, not guarantees: peak periods, public holidays or carrier delays can have an effect.
What is the return policy?
You have 30 days to return after receipt. Email info@siliconesandmore.com within 30 days of delivery with your name and order number. The full conditions are in our return policy.
How can I track my order?
As soon as your order has shipped, you'll receive a track & trace code by email. It can take up to 24 hours before the code is active.
I have a problem with my order – how do I reach you?
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Can I order as a business?
Yes. Apply for a business account; we review your application within 3 working days. After that you order while logged in and pay on invoice, with payment terms of 14 days after delivery.
EU businesses outside the Netherlands with a valid VAT number order with VAT reverse-charged (0%, intra-community supply). The VAT number is stored in your business account; it cannot be added to an order after it has been placed.