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CENUSIL® M 825 A/B

1 of 4 products in this brand
CENUSIL® M 825 A/B is a room-temperature curing silicone rubber (RTV-2) that is pourable and cures at ambient temperature. This addition-curing silicone rubber is specifically designed for making molds used in concrete casting. Moreover, CENUSIL® M 825 A/B is compliant with food contact regulations, including FDA and BfR standards.

Polymer Name: Silicone Elastomer

End Uses: Mold Making

Features: Excellent Flowability, Fast Curing, Good Mechanical Properties, Good Shrinkage Resistance, Good Tear Strength, Low Hardness, Low Viscosity, Pourable, Room Temperature Vulcanizing, Self Deaeration

Tear Strength: 20.0 - 20.0 kN/m

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Polymer Name
Technologies

Features & Benefits

Specific Features
  • Addition Curing
  • BfR compliant
  • Fast curing at room temperature
  • FDA compliant
  • Flowable
  • Low viscosity
  • No chemical shrinkage
  • Two-component

Applications & Uses

Markets
Plastics & Elastomers End Uses
Applications
  • Making molds for concrete casting.
  • Reproduction Molding
Application Details
  • Due to its good resistance to all common reproduction materials. e.g. casting resins, concrete, as well as the superior mechanical properties, CENUSIL® M 825 A/B is especially suitable for all molds of models with extensive undercuts.
  • As a low-Shore A addition silicone rubber that cures without undergoing dimensional shrinkage, CENUSIL® M 825 A/B is also suitable if absolutely accurate copies of models are required.

Properties

Catalyst Properties
ValueUnitsTest Method / Conditions
Demoldable (A+B, at 23°C)6hours
Mix Ratio (A:B)1:1parts by weight
Pot Life (A+B, at 23°C, up to 60000 mPa.s)60minutesDIN EN ISO 2555
Cured Properties
ValueUnitsTest Method / Conditions
Elongation (at break)450%ISO 37 Type 1
Shore Hardness A25DIN ISO 48-4
Tear Strength20N/mmASTM D 624 B
Tensile Strength5N/mm²ISO 37 Type 1
Uncured Properties
ValueUnitsTest Method / Conditions
Density (at 23°C, Componenet A)1.05g/cm³DIN EN ISO 2811-1
Density (at 23°C, Componenet B)1.05g/cm³DIN EN ISO 2811-1
Dynamic Viscosity (Component A, at 23°C)8000mPa·sISO 3219
Dynamic Viscosity (Component B, at 23°C)8000mPa·sISO 3219
Properties
  • Excellent flowability and self-deaeration
  • High tear strength
  • Low hardness (Shore A 25)
  • Mixing ratio of 1:1 for straightforward processing
  • Fast and non shrink cure at room temperature which can be accelerated considerably by the application of heat
  • Excellent long-term stability of the mechanical properties of the vulcanizate
  • Good resisitance to common reproduction materials

Regulatory & Compliance

Safety & Health

Safety Notes

Components A and B of the addition-curing grade CENUSIL® M 825 A/B contain only constituents that over many years have proved to be neither toxic nor aggressive. Special handling precautions are therefore not required, i.e., only the general industrial hygiene regulations apply.

Packaging & Availability

Country Availability
Packaging Type
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • Middle East
  • North America
  • Oceania
Packaging Information
  • CENUSIL® M 825 A 20 KG HOBBOCK PE
  • CENUSIL® M 825 A 200 KG DRUM SB
  • CENUSIL® M 825 B 20 KG HOBBOCK PE
  • CENUSIL® M 825 B 200 KG DRUM SB