GLS-PRO 20 - POLY ADDITION SILICON MOLD RUBBER

Platinum liquid silicone rubber, cold vulcanizing through a polyaddition reaction, to be used for casting.

Key features:

• Medium-low viscosity, able to penetrate anywhere and reproduce every detail.
• Suitable for the construction of pit molds, i.e., single-valve, of small objects even very detailed and with strong undercuts, such as figurines, statues, bas-reliefs, candles, etc.,
• It can also be brought into a gel phase with THIXOTROPIC AGENT GSA for brush or spatula application.
• With some precautions, it is possible to also create two-part or inter-cavity molds, to reproduce objects of a more complex structure or larger dimensions.
• Thanks to a medium Pot-life (60' at 25°C) and a low viscosity, this rubber allows for the total escape of trapped air.
• Demolding can be carried out after about 15 hours at 25°C.
• The ease of use is given by the 1:1 volume ratio, but it is necessary to remember that GLS-PRO cannot be cast directly on some materials (e.g., products containing sulfur, like plasticines, polyester-based resins, PVC, tin, and heavy metals in ionic form, amines) to avoid inhibition of the catalysis.
• Like all silicone rubbers, this rubber is non-stick on all materials except other silicone materials in general, on which it may have a more or less tenacious adhesion. Therefore, when not using masters in such materials, the use of release agents can easily be used.
• Finally, it is necessary to pay attention to the use of silicone rubbers on porous materials such as natural stones, plasters, gypsum, terracotta.

Technical specifications:

• Color after mixing: blue
• Usage ratio: 1:1 in volume and weight
• Shore A hardness: 20
• Linear shrinkage: < 0.1% (7 days after curing at 25°C)
• Tensile strength: 4.8 MPa (Film h=2 mm)
• Breaking elongation: 480% (Film h=2 mm)
• Tear elongation: 13.5±2 kN/m
• Pot Life at 25°C: 90 minutes
• Curing time at 25°C: 8 hours
• Demolding time at 25°C: 18 hours
• Final curing time at 25°C: 72 hours
• Specific weight: 1.05 gr/cm3
• Viscosity: 7000 ± 2000 mPas, 25°C