Polycraft GP28 General Purpose RTV Condensation Cure Mould Making Silicone Rubber
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Size: 5.5kg Kit,  Hardener: Blue - Fast SetSize: 5.5kg Kit,  Hardener: Green - Very Fast SetSize: 11kg Kit,  Hardener: Blue - Fast SetSize: 11kg Kit,  Hardener: Green - Very Fast SetSize: 22kg Kit,  Hardener: Blue - Fast SetSize: 22kg Kit,  Hardener: Green - Very Fast Set

Polycraft GP28 General Purpose RTV Condensation Cure Mould Making Silicone Rubber


Price:  £100.00(Inc. 20% VAT)(£83.33 Exc. VAT)Earn 100 Loyalty Points
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Quick Link Code:  QL4401
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Polymerization:  Condensation Cure

High strength silicone mould making rubber. Our silicone has been formulated for easy mixing by hand, with colour coded components (blue or green) giving a visual aid to ensure mixing is adequate. The two components mix easily and because of the low viscosity most grades can be used without processing in a vacuum chamber. This silicone is suited for the detailed reproduction of figures, art objects and similar items.

Features :
Outstanding release properties
High Flowabilty and long working time
Medium Hardness
High tear resistance
High elasticity for easy removal of complex replica parts
Can be made thixotropic (non flowable) for vertical surface replication
Cured Properties of MBFG Silicone

  • Blue silicone catalyst is by far the most popular catalyst to use with the GP28 silicone, it gives great air release with longer working and demould times.
  • Green silicone catalyst is used when time is off importance, it will cure a lot quicker roughly in half the time, but this will not give as good of air release as the red fast set catalyst.
  Blue Fast Catalyst Green Very Fast Catalyst
Mix Ratio 10 : 1 10 : 1
Working Time 40 - 60 Minutes 20 - 30 Minutes
Curing Times  8 - 10 Hours @ 25° 3 - 4 Hours @ 25°
Cured Colour  Blue Green 
De-Mould Time  12 - 24 Hours 6 - 8 Hours
Mixed Viscosity mPas  18000 18000
Hardness Shore A  28 28
Tensile Strength Mpa  3.0 3.0
Elongation @ Break %  520 520
Tear Strength kN/m  23 23
Linear Shrinkage  0.2-0.5 0.2-0.5

Base and catalyst use universal containers for various kit sizes and are supplied by weight, while the supplied containers may not be full, they will contain the correct amount of both base and hardener according to the listing. 

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