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Silicone Addition Colorless 5 for masks and soft moulds Silicone Addition Colorless 5 for masks and soft moulds Silicone Addition Colorless 5 for masks and soft moulds Silicone Addition Colorless 5 for masks and soft moulds

Silicone Addition Colorless 5 for masks and soft moulds

This set consists out of two component addition cure silicone that cures to very soft transparent slightly yellow silicone rubber. This is ideal for masks or for moulds of fragile castings

175 items in stock

  • Excl. BTW €18,14
  • Incl. BTW€21,95

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  • Low shrinkage of <0.1%.
  • Very liquid so self-deaerating
  • Transparent
  • Shore A 5 very soft
  • Suitable for mask making

Silicone Addition Colorless 5

Siliconen addition colorless 5 are very suitable for masks and props making or for flexible molds of delicate castings.

The Silicones A Colorless 5 is a 2-component (Platinum) addition curing silicone which cures at room temperature. 

Because of the low shrinkage and very low hardness combined with good strength these silicones are suitable for mask making and for molds of delicate castings.

Technical data

Mixing ratio (weight)


[A: B]


100: 100

Pot Life @ 20 ° C





Ontmaltijd @ 20ºC





Viscosity @ 20 ºC


[mPa s]





Transparent slightly yellow



[Shore A]



Tensile strength





Tear strength





Elongation at break





Density @ 20oC





Note: Pot life / de-mould time is highly dependent on temperature! At a higher temperature, the processing time and de-mould time are shorter.

The Silicone A and B component can easily be mixed by hand or by machine. Mix the A and B component carefully and in the indicated ratio (100 parts A and 100 parts B by weight). Process the mixture within the pot life and demould only after it is cured complete. Alternatively, you can speed up the curing process by placing the whole mould in an oven. Please note that air bubbles will then have less time to escape the casting.


This shore hardness of this silicone can be adjusted by adding the Silicone Addition Colorless 50.

If you combine a mixture of the Shore 5 with a mixture of the Shore 50 you get a shore hardness between 5 and 50. For example: For 100 grams of Shore 18,5 you need 35 grams of Shore 5 A component 35 grams of Shore 5 B component together with 15 grams of Shore 50 A component and 15 grams of Shore 50 B component.

Extra information 
Trapping of air bubbles can be prevented best by placing the silicone under vacuum immediately after mixing. To prevent air bubbles, stir the A and B component well but slowly without stirring in air. We advise to use a figur of 8 motion. If you want to reduce the Shore (hardness), you can add silicone oil from the shop. Please note that oil does not bind to the silicone network and may over time bleed from the silicone.
If you do not want to pour the silicone spatula but you can add Silicone Thixo A (note: not Silicone Thixo C !!). You can also add fumed silica. You can silicone intense colors with silicon dye.

Please note: This is an addition curing silicone. This type of silicones may experience cure inhibition when coming into contact with sulfer, nitrogen, amino groups and metl salts. If you are not certain that the products you use (including gloves, spatulas and cups) contain these ingredients, please do a little test first! These components are often found in many latex gloves, some platicines, glues, laquers, condensation curing silicones, silicone caulk, natural rubbers and 3D printing materials (mainly stereolithography). If you still want to use such materials you might have to brush on a protective layer of poly vinyl alcohol.

The products are packaged in sets of 1kg, 2kg, 9 Kg, 40 Kg and 400 Kg. The components can not be ordered separately.

For larger packages we ask you to contact us through the site.

Provided that the silicone in sealed packaging, stored cool and frost-free, the shelf life is tenminste1 year.

If you use silicone frequently we advice the use of gloves and to work in a properly ventilated area. For safety information see the safety data sheet.


Shore (A) :


Color A Comp. :


Color B Comp. :


end Color :


cured density :

1.05 g/cm3

viscosity mixture :

2500 mPa s

Mixing ratio A: B :


Working Time @ 20 ° C :

30 minutes

Curing time @ 20 C :

2 hours

tensile strength :

1.05 N/mm2

extensibility :


tear Strength :

> 8 N / mm

linear shrinkage :


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