ELASTOSIL® RT 629 A/B

Chemical Family: Silicones

ELASTOSIL® RT 629 A/B is a pourable, addition-curing, two-component silicone rubber that vulcanizes at room temperature. It is an antistatic product that offers fast curing at room temperature. The material is flowable and exhibits low viscosity. It does not experience chemical shrinkage. This two-component system is specifically designed for elastomers used in pad printing applications.

Product families

Elastomers — Specialty Elastomers

Silicone Elastomers

Other characteristics

Brand: ELASTOSIL® RT
Features: Anti-Static, Excellent Flowability, Excellent Mechanical Strength, Fast Curing, Good Flow, Good Mechanical Properties, Good Shrinkage Resistance, High Reactivity, Low Shrinkage, Low Viscosity, Medium Hardness, Pourable, Room Temperature Vulcanizing, Tear Resistance
Polymer Name: Silicone Elastomer
Tear Strength: 25.0 - 25.0 kN/m
Note: Cured Properties: After 24 hours at 23°C.
Properties: Antistatic finish; 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 hardness (Shore A approx. 31); Excellent mechanical properties
Cure: Chemical Cure
Heat Cure
Moisture Cure
Applications: Making antistatic printing pads.
Safety Note: Components of the addition-curing grade ELASTOSIL® RT 629 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
Specific Features: Addition Curing
Antistatic
Fast curing at room temperature
Flowable
Low viscosity
No chemical shrinkage
Two-component
Material Features: Anti-Static
Excellent Flowability
Excellent Mechanical Strength
Fast Curing
Good Flow
Good Mechanical Properties
Good Shrinkage Resistance
High Reactivity
Chemical Inventories: AIIC (Australia)
DSL (Canada)
ENCS (Japan)
PICCS (Phillipines)
TCSI (Taiwan)
TSCA (USA)

Technical data

Table 1 of 3

4 rows

Characteristic	Value	Unit	Method
Curing Time (A+B, tack-free)	3	hours	—
Dynamic Viscosity (A+B, at 23°C)	8000	mPa·s	ISO 3219
Mix Ratio (A:B)	10:1	parts by weight	—
Pot Life (A+B, up to 60,000 mPa.s)	40	minutes	DIN EN ISO 2555

Table 2 of 3

6 rows

Characteristic	Value	Unit	Method
Density (in water, at 23°C)	1.13	g/cm³	DIN EN ISO 1183-1 A
Elongation (at break)	500	%	ISO 37 Type 1
Linear Shrinkage	max. 0.1	%	—
Shore Hardness A	31	—	DIN ISO 48-4
Tear Strength	25	N/mm	ASTM D 624 B
Tensile Strength	6	N/mm²	ISO 37 Type 1

Table 3 of 3