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WACKER SilGel® 631 A/B

WACKER SilGel® 631 A/B is a pourable, addition-curing, RTV-2 silicone rubber that was developed for offshore seismic streamer applications. It cures at room temperature to a very soft silicone gel.


Properties

  • two-part, 1:1 mix ratio
  • low viscosity
  • rapid heat cure
  • slow cure time at room temperature
  • very low hardness
  • clear and colorless

 

 

Processing
surface preparation
All surfaces must be clean and free of contaminants
that will inhibit the cure of WACKER SilGel® 631 A/B.
Examples of inhibiting contaminants are sulfur
containing materials, plasticizers, urethanes, amine
containing materials and organometallic compounds –
especially organotin compounds.
If a substrate’s ability to inhibit cure is unknown, a
small-scale test should be run to determine
compatibility.

mixing
Caution
Only components A and B with the same lot number
may be processed together!
Component B of WACKER SilGel® 631 A/B contains
the platinum catalyst, component A the crosslinker.
Even traces of the platinum catalyst may cause gelling
of the component containing the crosslinker.
The two components should be thoroughly mixed at a 1 : 1 ratio by weight or volume.
To eliminate any air introduced during dispensing or
trapped under components or devices a vacuum encapsulation
is recommended.

curing
Curing time of addition curing silicone rubber is highly dependent on temperature, size and heat sink properties of the component being potted.

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 Ltd.
2 Arlington Square, Downshire Way
Bracknell RG12 1WA
United Kingdom
+44  1344  401 670 (Phone)
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Products Technical data
Viscosity, dynamic Penetration
WACKER SilGel® 612 A/B 1000 mPa·s[1] 1000 mPa·s[1] 300 1/10mm[2] 300 1/10mm[2]
WACKER SilGel® 613 - - 70 1/10mm[3] 70 1/10mm[3]
WACKER SilGel® 616 A/B 300 mPa·s[1] 300 mPa·s[1] 280.0 1/10mm[4] 280.0 1/10mm[4]
Legend
[1] Viscosity, dynamic | 25 °C | ISO 3219,  [2] Penetration | DIN ISO 2137 | 150 g hollow cone, 1 min.,  [3] Penetration (hollow cone, 9.38 g) | DIN ISO 2137,  [4] Penetration | DIN ISO 2137 | 150 g hollow cone, 60 sec. 

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Sales Contact

Wacker Chemicals Ltd.
2 Arlington Square, Downshire Way
Bracknell RG12 1WA
+44  1344  401 670 (Phone)

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