ELASTOSIL® M 4645 A/B

Chemical Family: Silicones

ELASTOSIL® M 4645 A/B is a pourable, addition-curing, two-component silicone rubber that vulcanizes at room temperature. It offers a fast and non-shrink cure at room temperature, which can be significantly accelerated by applying heat. This grade is specifically designed for vacuum casting in rapid prototyping applications.

Product families

Applications

Industrial — Chemical & Industrial Manufacturing

Tooling & Moldmaking

Product Families

Elastomers — Specialty Elastomers

Silicone Elastomers

Other characteristics

Brand: ELASTOSIL® M
End Uses: Mold Making, Prototyping
Features: Chemical Resistant, Cost Effective, Excellent Flowability, Excellent Mechanical Strength, Excellent Mold Release, Excellent Transparency Properties, Fast Curing, Flame Resistant, Good Flow, Good Mechanical Properties, Good Shrinkage Resistance, Good Tear Strength, High Bleed Resistant, High Hardness, High Performance, High Strength, Long Potlife, Long Term Protection, Low Shrinkage, Medium Hardness, Pourable, Room Temperature Vulcanizing, Shock Resistant
Polymer Name: Silicone Elastomer
Tear Strength: 28.0 - 28.0 kN/m
Processing Methods: Vacuum Casting
Note: Cured properties are vulcanized after 24 h at 23 °C.
Color: Transparent
Markets: Industrial
Properties: Very good flow; Excellent mold release, usually no further release agent required; Fast and non-shrink cure at room temperature which can be accelerated considerably by the application of heat.; Medium shore A hardness; Good transparency of the cured rubber; High tear strength; Outstanding resistance to casting resins, particularly polyurethanes and epoxies, for long service life of the molds.; Strong oil-bleeding
Cure: Chemical Cure
Heat Cure
Safety Note: Components of the addition-curing grade ELASTOSIL® M 4645 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.
Technology: Elastomers
Special Features: Addition-curing
Excellent mechanical properties
No shrinkage
Strong oil bleeding
Two-component
Material Features: Chemical Resistant
Cost Effective
Excellent Flowability
Excellent Mechanical Strength
Excellent Mold Release
Excellent Transparency Properties
Fast Curing
Flame Resistant

Technical data

Table 1 of 3

4 rows

Characteristic	Value	Unit	Method
Curing Time (A+B, tack-free)	12	hours	—
Dynamic Viscosity (A+B, at 23°C)	35000	mPa·s	ISO 3219
Mix Ratio (A:B)	10:1	parts by weight	—
Pot Life (A+B, at 23°C, up to 150000 mPa.s)	80	minutes	—

Table 2 of 3

6 rows

Characteristic	Value	Unit	Method
Density (in water, at 23°C)	1.06	g/cm³	ISO 2781
Elongation (at break)	330	%	ISO 37
Linear Shrinkage	max. 0.1	%	—
Shore Hardness A	40	—	ISO 868
Tear Strength	min. 28	N/mm	ASTM D 624 B
Tensile Strength	5	N/mm²	ISO 37

Table 3 of 3