This content is for United Arab Emirates. Our system has detected that you are from United States. Do you want to set United States as your new country?

ELASTOSIL® RT 646 A/B

ELASTOSIL® RT 646 A/B is a castable, addition-curing, two-component silicone rubber which vulcanizes at room temperature.

Main applications: Moldmaking, encapsulation of electronic components, all-round potting compound.


Properties

  • High hardness and good mechanical properties
  • Good chemical resistance
  • Good resistance to casting resins
  • Excellent reversion resistance
  • Fast and non-shrink vulcanization at room temperature
  • Vulcanization can be accelerated considerably by heat

Specific features of ELASTOSIL® RT 646 A/B

  • Addition Curing
  • Flowable
  • Resistance against casting resins
  • Two-component
  • Encapsulation of electronic components
  • All-round potting compound
  • Mold making

Important note:
The platinum catalyst is in component A.


Caution:
Only components A and B with the same lot number may be processed together!


To ensure homogeneity of the material, the components must be stirred thoroughly before they are removed or processed in their containers, in order to uniformly disperse any filler that might have settled during storage.


 Please check also our brochures and info sheets.

Storage

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.

Sales and support

Wacker Chemicals Middle East
Dubai Silicon Oasis s/n
0001 Dubai
United Arab Emirates
+971  4  709-9999 (Phone)
+971 4 709-9911  (Fax)
Contact

How can we help you?

  • Do you need help in choosing a product or do you require technical support? If so, please contact our experts.
Ask a question

Would you like a product sample?

You can request a product sample here.

Request sample

More products

Products Technical data
Viscosity, dynamic Tear strength Hardness Shore A Tensile strength Elongation at break
CENUSIL® M 810 A/B 3000 mPa·s[1] 3000 mPa·s[1] 15 N/mm[10] 15 N/mm[10] 10[13] 10[13] 3.5 N/mm²[15] 3.5 N/mm²[15] 600 %[18] 600 %[18]
CENUSIL® M 820 A/B 6000 mPa·s[2] 6000 mPa·s[2] - - 20[13] 20[13] 4 N/mm²[15] 4 N/mm²[15] 500 %[18] 500 %[18]
CENUSIL® M 825 A/B 8000 mPa·s[3] 8000 mPa·s[3] 20 N/mm[10] 20 N/mm[10] 25[13] 25[13] 5 N/mm²[15] 5 N/mm²[15] 450 %[18] 450 %[18]
CENUSIL® M 830 A/B 8000 mPa·s[3] 8000 mPa·s[3] > 20 N/mm[10] > 20 N/mm[10] 26[13] 26[13] 5 N/mm²[15] 5 N/mm²[15] 500 %[18] 500 %[18]
ELASTOSIL® FX 10 A/B 6000 mPa·s[3] 6000 mPa·s[3] > 20 N/mm[11] > 20 N/mm[11] 10[13] 10[13] 4.5 N/mm²[15] 4.5 N/mm²[15] 950 %[18] 950 %[18]
ELASTOSIL® M 1470 - - > 10 N/mm[10] > 10 N/mm[10] 45[14] 45[14] 4.5 N/mm²[16] 4.5 N/mm²[16] 230 %[19] 230 %[19]
ELASTOSIL® M 4115 A/B 2500 mPa·s[3] 2500 mPa·s[3] 5 N/mm[10] 5 N/mm[10] 17[13] 17[13] 3 N/mm²[15] 3 N/mm²[15] 400 %[18] 400 %[18]
ELASTOSIL® M 4125 F A/B 6000 mPa·s[3] 6000 mPa·s[3] - - 28[14] 28[14] 5.0[17] 5.0[17] 500[19] 500[19]
ELASTOSIL® M 4370 A/B 350 mPa·s[4] 350 mPa·s[4] > 4 N/mm[10] > 4 N/mm[10] 55[13] 55[13] 3.0 N/mm²[16] 3.0 N/mm²[16] 130 %[19] 130 %[19]
ELASTOSIL® M 4400 30000 mPa·s[5] 30000 mPa·s[5] > 3 N/mm[10] > 3 N/mm[10] 23[14] 23[14] 2 N/mm²[16] 2 N/mm²[16] 250 %[19] 250 %[19]
ELASTOSIL® M 4440 25000 mPa·s[5] 25000 mPa·s[5] 4.5 N/mm[10] 4.5 N/mm[10] 37[14] 37[14] 2.5 N/mm²[16] 2.5 N/mm²[16] 220 %[19] 220 %[19]
ELASTOSIL® M 4470 15000 mPa·s[6] 15000 mPa·s[6] > 4 N/mm[10] > 4 N/mm[10] 60[14] 60[14] 4.5 N/mm²[16] 4.5 N/mm²[16] 120 %[19] 120 %[19]
ELASTOSIL® M 4503 40000 mPa·s[6] 40000 mPa·s[6] > 20 N/mm[10] > 20 N/mm[10] 25[13] 25[13] 20 N/mm²[16] 20 N/mm²[16] 350 %[19] 350 %[19]
ELASTOSIL® M 4511 25000 mPa·s[5] 25000 mPa·s[5] > 18 N/mm[10] > 18 N/mm[10] 12[14] 12[14] 3.5 N/mm²[16] 3.5 N/mm²[16] 600 %[19] 600 %[19]
ELASTOSIL® M 4512 30000 mPa·s[5] 30000 mPa·s[5] > 24 N/mm[10] > 24 N/mm[10] 20[14] 20[14] 3.5 N/mm²[16] 3.5 N/mm²[16] 500 %[19] 500 %[19]
ELASTOSIL® M 4514 35000 mPa·s[6] 35000 mPa·s[6] > 25 N/mm[10] > 25 N/mm[10] 25[13] 25[13] 4.5 N/mm²[16] 4.5 N/mm²[16] 450 %[19] 450 %[19]
ELASTOSIL® M 4541 40000 mPa·s[6] 40000 mPa·s[6] > 30 N/mm[10] > 30 N/mm[10] 32[14] 32[14] 5 N/mm²[16] 5 N/mm²[16] 400 %[19] 400 %[19]
ELASTOSIL® M 4600 A/B 20000 mPa·s[6] 20000 mPa·s[6] > 20 N/mm[10] > 20 N/mm[10] 20[14] 20[14] 7[16] 7[16] 800 %[19] 800 %[19]
ELASTOSIL® M 4601 A/B 15000 mPa·s[6] 15000 mPa·s[6] > 30 N/mm[10] > 30 N/mm[10] 28[14] 28[14] 6.5 N/mm²[16] 6.5 N/mm²[16] 700 %[19] 700 %[19]
ELASTOSIL® M 4642 A/B 20000 mPa·s[6] 20000 mPa·s[6] > 30 N/mm[10] > 30 N/mm[10] 37[14] 37[14] 7 N/mm²[16] 7 N/mm²[16] 480 %[19] 480 %[19]
ELASTOSIL® M 4643 A/B 40000 mPa·s[6] 40000 mPa·s[6] > 10 N/mm[10] > 10 N/mm[10] 48[14] 48[14] 5 N/mm²[16] 5 N/mm²[16] 300 %[19] 300 %[19]
ELASTOSIL® M 4670 A/B 120000 mPa·s[6] 120000 mPa·s[6] 15 N/mm[10] 15 N/mm[10] 55[13] 55[13] 5.5 N/mm²[15] 5.5 N/mm²[15] 280 %[18] 280 %[18]
ELASTOSIL® RT 480 300000 - 400000 mPa·s[7] 300000 - 400000 mPa·s[7] > 7 N/mm[10] > 7 N/mm[10] 55[14] 55[14] 4.5 N/mm²[16] 4.5 N/mm²[16] 170 %[19] 170 %[19]
ELASTOSIL® RT 625 A/B 25000 mPa·s[6] 25000 mPa·s[6] 30 N/mm[10] 30 N/mm[10] 25[13] 25[13] 6.5 N/mm²[15] 6.5 N/mm²[15] 600 %[18] 600 %[18]
ELASTOSIL® RT 646 A/B 110000 mPa·s[3] 110000 mPa·s[3] 12 N/mm[10] 12 N/mm[10] 53[13] 53[13] 5 N/mm²[15] 5 N/mm²[15] 280 %[18] 280 %[18]
ELASTOSIL® RT K - - > 3 N/mm[12] > 3 N/mm[12] 45[14] 45[14] 2 N/mm²[16] 2 N/mm²[16] 130 %[19] 130 %[19]
ELASTOSIL® VARIO 15 5.000 mPa·s[8] 5.000 mPa·s[8] 15[10] 15[10] 15[13] 15[13] 6.5 N/mm²[15] 6.5 N/mm²[15] 900 %[18] 900 %[18]
ELASTOSIL® VARIO 40 15.000 mPa·s[9] 15.000 mPa·s[9] 15 N/mm[10] 15 N/mm[10] 40[13] 40[13] 8 N/mm²[15] 8 N/mm²[15] 450 %[18] 450 %[18]
Legend
[1] Viscosity, dynamic | Brookfield,  [2] Viscosity, dynamic 23°C | ISO 3219,  [3] Viscosity, dynamic | 23 °C | ISO 3219,  [4] Viscosity, dynamic after stirring | 23 °C ,  [5] Viscosity, dynamic after stirring | 23 °C | DIN EN ISO 3219,  [6] Viscosity, dynamic after stirring | 23 °C | ISO 3219,  [7] Viscosity, dynamic | 23 °C | Brookfield,  [8] Viscosity, dynamic 23°C, stirred | ISO 3219,  [9] Viscosity, dynamic 23° C, stirred | ISO 3219,  [10] Tear strength | ASTM D 624 B,  [11] Tear strength | ASTM D 624, Die B,  [12] Tear strength | ASTM 624 B,  [13] Hardness Shore A | DIN ISO 48-4,  [14] Hardness Shore A | ISO 868,  [15] Tensile strength | ISO 37 type 1,  [16] Tensile strength | ISO 37,  [17] Tensile strength | DIN ISO 37,  [18] Elongation at break | ISO 37 type 1,  [19] Elongation at break | ISO 37 

Order

My media


Go to order form

Sales Contact

Wacker Chemicals Middle East
Dubai Silicon Oasis s/n
0001 Dubai
+971  4  709-9999 (Phone)

My favorites

My products