RTV 13 - High Tear Strength Moulding Silicone
2 component, room temperature condensation curing silicone compound.
Mix ratio = 20:1 (100 grams Part A : 5 grams Part B).
Available as: 21.0Kg, 5.25Kg, or 1.05Kg.
Fast or Slow cure available.
 
The cured product is an exeptionally flexible rubber with very
high mechanical properties and good shelf life stability.
It's suitable for mould making of intricate patterns with
extremely good pick up of fine details.  Softer grades are
better suited for where there are deep undercuts. 
 
Key Features
High tear strength
Good with deep undercuts
High elongation
Easy degassing
Available with either Fast or Slow catalyst.
 
Vertical Application
RTV13 can be used to make mouldings vertical surfaces by
employing Thixotroping Agent BS4.  A typical formulation for
good Thixotropy and approximately the same working life of
the normal rubber is shown below:
RTV13: 95-100 parts by weight
Catalyst: 5 parts by weight
BS4 Thixo: 3 parts by weight
 
Pot life: 80 minutes
Viscosity: 14,000 mPa.s
Catalysed viscosity: 11,000 mPa.s
De-mould time (23°C): 10 hours
Appearance: viscous liquid
Colour: beige
 
Cured Elastomer
Tensile Strength: 2.8 MPa
Elongation at break: 622 %
Youngs modulus: 0.79 MPa
Modulus at 100% strain: 0.38 MPa
Tear Strength: 20.18 kN/m
Hardness Shore A: 15
Specific Gravity: 1.23
Linear Shrinkage: 0.4 %