ELASTOSIL® RT 604 A/B

Chemical Family: Silicones

ELASTOSIL® RT 604 A/B is a pourable, addition-curing two-part silicone rubber that vulcanizes at room temperature. It is a highly transparent, flowable material with very low viscosity. This two-component general-purpose encapsulant features rapid heat cure, low hardness, and a crystal-clear appearance.

Product families

Applications

Electrical & Electronics — Packaging & Assembly

Potting Compounds

Product Families

Ready-to-Use Products — Adhesives & Sealants

Encapsulants

Other characteristics

Brand: ELASTOSIL® RT
Cure Method: Air Dry, Chemical Cure, Heat Cure
Product Type: 2K (2 component) Sealant, Encapsulant, Potting Compound; 2K (2 component) Sealant; Encapsulant; Potting Compound
Note: Cured properties are cured for 30 min at 150 °C in a circulating air oven.
Color: Transparent
Markets: Electrical & Electronics
Properties: Two-part, 9 : 1 Mixing Ratio
Very Low Viscosity
Rapid Heat Cure
Low Hardness
Crystal Clear
Cure: Air Dry
Chemical Cure
Heat Cure
Safety Note: According to the latest findings, the addition-curing silicone rubber ELASTOSIL® RT 604 A/B contains neither toxic or corrosive substances which would require special handling precautions.
Technology: Ready-to-Use Products

Technical data

Table 1 of 3

4 rows

Characteristic	Value	Unit	Method
Dynamic Viscosity (A+B, of mix)	800	mPa·s	ISO 3219
Mix Ratio (A:B)	9:1	parts by weight	—
Platinum Catalyst in Component (A+B)	Component A	—	—
Pot Life (A+B, at 23°C, up to 5000 mPa.s)	90	minutes	—

Table 2 of 3

3 rows

Characteristic	Value	Unit	Method
Density (at 23°C)	0.97	g/cm³	ISO 2781
Shore Hardness A	25	—	ISO 868
Volume Resistivity	10¹⁵	Ohm-cm	IEC 60093

Table 3 of 3