ELASTOSIL® RT 623 A/B Silicone Rubber (RTV-2)
Room Temperature Curing Silicone Rubber (RTV-2)
Pourable, addition-curing, two-component silicone rubber for pad printing that vulcanizes at room temperature.
Main application: Making printing pads.
Properties
• very good flow
• high reactivity for fast demolding even if large amounts of silicone fluid are added
• fast and non-shrink cure at room temperature which can be accelerated considerably by the application of heat
• medium Shore A hardness (approx. 31)
• high tear strength
• long-term stability of the vulcanizate’s mechanical properties, particularly its hardness
Specific features
• Addition Curing
• Excellent mechanical properties
• Fast curing at room temperature
• Flowable
• No chemical shrinkage
• Two-component
Technical data
Application
• Elastomers for Pad Printing
Application details
Base rubber for making printing pads.
ELASTOSIL® RT 623 A/B has been specially designed as a base material for making printing pads.
The vulcanizate’s high mechanical strength and long term stability of hardness make ELASTOSIL® RT 623 A/B an ideal
base material for producing printing pads with excellent mechanical properties and long service life.
Processing
Important note:
The platinum catalyst is in component B.
Important:
A and B components may only be used together if they have the same batch number.
To ensure both optimum flow and homogeneity of the material, the components must be stirred thoroughly before they are removed or processed in their containers, in order to uniformly disperse any fillers that might have settled during storage.
Dilution charts:
The following table shows the hardness of ELASTOSIL® RT 623 A/B as a function of the added amount of Wacker Silicone Fluid AK 35 for Durometer Types Shore A and Shore 00.
Please check also our brochures and info sheets.
Packaging and storage
Storage
The ‘Best use before end’ date of each batch is shown on the product label.
Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case
however, the properties required for the intended use must be checked for quality assurance reasons.
Safety notes
Comprehensive instructions are given in the corresponding Material Safety Data Sheets. They are available on request from
WACKER subsidiaries or may be printed via WACKER web site www.wacker.com.