Silastic 3481 Base - Industrial Plasters
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  • Silastic 3481 Base

  • Top quality Dow Corning/Xiameter Silastic 3481 Base

  • SIL34811

SIlastic 3481 is our best quality silicone.  Its toughness and flexibility together with the choice of curing agent speeds add up to make this Dow Corning silicone a leader in its field.  Highly recommended when casting with resins, plaster, Jesmonite and concrete.


You can use the pigmented 10% Silicone Catalyst or the clear 5% Silastic 81 Curing Agent range.


The Silastic 81 Curing Agent gives a Shore A hardness of 24, and maximises tear strength, whereas the 10% Silicone Catalyst gives a softer 20 Shore A and a slightly weaker mould.


10% Silicone Catalyst:  1kg Base requires 100g, 5kg base 500g and 20kg base 2kg.

5% Silastic Curing Agent:  1kg Base requires 50g, 5kg base 250g and 20kg base 1kg.


Silastic 81-F (Fast) - this is the most common.

Gel Time: 30 minute

De-Mold Time: 5 hours


Silastic 81-R (Resin-resistant) - this is more resistant to polyester resin, so increases the mould–life.

Gel Time: 90 minute

De-Mold Time: 24 hours


Silastic 81-VF (Very Fast) - this really is Very Fast!  So only use for specific applications.

Gel Time: 10 minute

De-Mold Time: 1½ hours


As a guide, the yield (or coverage) of 1kg Silicone is 1290 cm2 at 6mm deep.

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