ELASTOSIL® M 4670 A/B

Chemical Family: Silicones

ELASTOSIL® M 4670 A/B is a pourable, addition-curing, two-component silicone rubber that vulcanizes at room temperature. It is primarily used for making shrink-free molds with excellent reproduction accuracy. Additionally, this grade is compliant with FDA and BfR regulations for food contact 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, Fast Curing, Flame Resistant, Food Contact Acceptable, Good Flow, Good Mechanical Properties, Good Shrinkage Resistance, Good Tear Strength, High Hardness, High Strength, Long Term Protection, Low Shrinkage, Medium Hardness, Pourable, Room Temperature Vulcanizing, Shock Resistant
Polymer Name: Silicone Elastomer
Tear Strength: 12.0 - 12.0 kN/m
Processing Methods: Vacuum Casting
Note: Cured properties are vulcanized after 24 h at 23 °C.
Color: Beige
Markets: Industrial
Properties: Good flow; Fast and non-shrink cure at room temperature which can be accelerated considerably by the application of heat.; High shore A hardness; High tear strength; Long-term stability of the vulcanizate's mechanical properties.; Outstanding resistance to common casting resins
Cure: Chemical Cure
Heat Cure
Safety Note: Components of the addition-curing grade ELASTOSIL® M 4670 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
Labeling Claims: Food Contact Acceptable
Special Features: Addition Curing
BfR compliant
Dry surface
FDA compliant
Flowable
Food-contact
No chemical shrinkage
Resistance against epoxy resins
Material Features: Chemical Resistant
Cost Effective
Excellent Flowability
Excellent Mechanical Strength
Fast Curing
Flame Resistant
Food Contact Acceptable
Good Flow

Technical data

Table 1 of 3

4 rows

Characteristic	Value	Unit	Method
Curing Time (non-adhesive)	12	hours	—
Dynamic Viscosity (at 23°C)	80000	mPa·s	ISO 3219
Mix Ratio (A:B)	10:1	parts by weight	—
Pot Life (at 23°C, 150000 mPa·s)	90	minutes	DIN EN ISO 2555

Table 2 of 3

6 rows

Characteristic	Value	Unit	Method
Density (in water, at 23°C)	1.28	g/cm³	DIN EN ISO 1183-1 A
Elongation (at break)	250	%	ISO 37 Type 1
Linear Shrinkage	max. 0.1	%	—
Shore Hardness A	55	—	DIN ISO 48-4
Tear Strength	min. 12	N/mm	ASTM D 624 B
Tensile Strength	5.5	N/mm²	ISO 37 Type 1

Table 3 of 3