Silicone Moulding Rubber 2.06kg kit

(Inc. 20% VAT)
(£24.54 Exc. VAT)

Kit Consists of 2kg Silicone + 60g Catalyst

Approximate Volume 1.9 Litres

Ratio of Catalyst Pot Life Cure Time
4% (4g per 100g) 4-6 minutes 1.5 - 2.5 hours
3% (3g per 100g) 15-20 minutes 3-5 hours
2% (2g per 100g) 25-30 minutes 7-10 hours

*Supplied with 3% worth of catalyst*

This product is a tin/condensation cured rubber and has been formulated to be a high quality flexible, elastic material with exceptional tensional and tear strength. There is almost no shrinkage (0.2%) and excellent reproduction of fine detail without the use of a vacuum chamber due to its low viscosity. It has a long mould life with outstanding release properties. This rubber is suitable for casting a wide range of materials in particular casting resins which we can also supply. Please see the bottom of the listing for examples of suitable casting materials.

The kit comprises of a white base rubber and a purple catalyst which provides a visual aid to ensure that the material is thoroughly mixed. A clear catalyst is also available if that is your preference. We have also focused on minimizing the potential health risks to the user by formulating a non-toxic, non-flammable and virtually odourless catalyst unlike the majority of other condensation cure silicones that can use a toxic catalyst.

Available in two hardnesses, soft and medium. The soft is better suited to moulding delicate, fragile items where the rubber needs to be soft and flexible enough to peel off without damaging the casting. The medium is suitable for the majority of cases.

This product is not suitable for use with food. For a suitable product please click here

The catalyst is a skin irritant making this product unsuitable for applying directly to human skin for life casting. For a suitable product please click here

The maximum operating temperature is 180°C. For a high temperature rubber click here

This is a condensation/tin cured rubber so cannot be used as a mould for addition/platinum cured silicone rubbers as it will inhibit its cure.

Additional catalyst can be purchased here

For creating a two part mould or moulding a glass object a release agent is required click here

Can be pigmented to a wide range of colours click here

It can be softened to your own requirements using this softening additive click here

Can be made thixotropic for applying to vertical surfaces or to over head objects click here

Physical Properties Medium Version Soft Version
Viscosity mPas 18,000 11,000
Density 1.08 1.08
Tensile Strength Mpa 4.5 4
Elongation 420% 500%
Tear Strength kN/m 28 25


Polyurethane resin *
(* Excl. some transparent polyurethanes, check with supplier of the resin if silicone moulds are suitable.)

Epoxy resin *
(* Excl. some epoxies, check with supplier of the resin if silicone moulds are suitable.)

Polyester resin

Acrylic resin

Plastisol (PVC)



Polymer Clays



Metals with a pouring temperature below 180°C


pdf-image-white.jpg Technical Data Sheet  pdf-image-white.jpg Safety Data Sheet Base pdf-image-white.jpg Safety Data Sheet Catalyst