Pourable, addition-curing, two-component silicone rubber that vulcanizes at room temperature.

Main application: making shrink-free molds with excellent reproduction accuracy.

Application details

• Due to its outstanding resistance to casting resins as well as its superior mechanical properties ELASTOSIL® M 4642 A/B is perfectly suitable for all molds of models with undercuts that are to be reproduced in casting resins, and a certain inherent rigidity of the molds is required.
• As a medium-shore addition-curing RTV-2 silicone rubber that cures without undergoing dimensional shrinkage, ELASTOSIL® M 4642 A/B is also extremely suitable for casting all other common reproduction materials, particularly if accurate copies of models with undercuts are required.

Properties

• very good flow
• fast and non-shrink cure at room temperature which can be accelerated considerably by the application of heat
• medium Shore A hardness (approx. 37)
• high tear strength
• long-term stability of the vulcanizate’s mechanical properties
• outstanding resistance to common casting resins