ELASTOSIL® M 4511
Pourable, condensation-curing, two-component silicone rubber that vulcanizes at room temperature.
Main application: Making cost effective molds, specially suited for casting PE and PU resins.
- very good flowability and self-deaeration
- very low Shore A hardness (approx. 12)
- high tear strength
- extremely high elongation and flexibility
- outstanding chemical resistance to attack by polyester and polyurethane resins, mold life is significantly extended
ELASTOSIL® M 4511 is a high-performance moldmaking compound, which is particularly suitable for the reproduction of models with extensive undercuts. ELASTOSIL® M 4511 is especially suitable for the processing of polyester and polyurethane resins.
Due to its very high extensibility and low flexural modulus, ELASTOSIL® M 4511 is best suited for the reproduction of fine or fragile models, where the piece may be damaged by more rigid molding materials on demolding.
ELASTOSIL® M 4511 exhibits low hardness and high strength, plus excellent ink transfer characteristics. These make it a perfect base material for the production of printing pads.
If molds for processing epoxy or polyurethane resins are to be made, ELASTOSIL M 4511 is cured by adding 5 wt % Catalyst T 21.
For molds used to process other reproduction materials such as polyester resins, plaster, concrete, synthetic stone, wax or low-melting alloys, 5 wt % Catalyst T 51 should be used.
Pot lifes and curing times of both catalysts may be accelerated, and thus adjusted to suit the individual application by blending with Catalyst T 47.
The pot life is the period of time at 23 °C / 50 % rel. humidity during which the catalyzed mix to attain a viscosity of 100,000 mPa s and still be just pourable
For faster curing either catalyst may be blended with Catalyst T 47. E.g. at a ratio of 95 : 5 (T51 : T47) the pot life decreases to about 30 min, and the mold needs only about 4 h to cure.
Further instructions on blending any catalyst with Catalyst T 47 may be found in our data-sheet: "WACKER® T-series catalysts".
Comprehensive instructions are given in our leaflet “ROOM TEMPERATURE VULCANIZING (RTV) SILICONES - Material and Processing Guidelines"
Detailed information on other mold-making compounds in the ELASTOSIL ® M range is contained in our brochure “ELASTOSIL® Silicone Rubber for Mold Making”.
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.