RTV-2 Platinum Liquid Silicone Rubber——Professional Solution for Plaster/Concrete Crafts Molds

1.Core product positioning
RTV-2 platinum liquid silicone rubber is an industrial-grade material designed for high-precision plaster/concrete crafts and resin casting molds. It solves the core pain points of traditional molds that are easy to deform and lose details through its **zero shrinkage rate (<0.1%) and high temperature resistance (250°C)** characteristics.

2.Five major technical advantages
(1) Nano-scale reproduction, details will never be lost
With a fluidity of 120,000cps, it can capture 0.03mm fingerprint-level textures on sculptures (such as the rough texture of concrete reliefs and the precise structure of resin miniature models).

(2) High-temperature stability ensures consistency in mass production
Withstands the exotherm of gypsum curing (80-100°C) and high-temperature resin pouring (180°C), and the size change after 100 consecutive uses is ≤0.05%.

(3) Ultra-low shrinkage formula to eliminate demoulding deformation
The platinum catalytic system eliminates curing shrinkage and ensures that the joint error of large concrete components (such as 1:1 antique capitals) is less than 0.3mm.

(4) Ultra-long service life
Tear resistance ≥25kN/m, which is 5 times longer than the life of ordinary silicone molds. A single mold can complete 300+ concrete pours.

(5) Ecological compatibility
Does not contain tin or heavy metals, and discarded molds can be thermally cracked and recycled into silica powder.

General parameters

2. Typical application scenarios and process matching
(1)Restoration and reproduction of cultural relics
Application:

 Museum plaster cultural relics re-molding (such as Buddha statues, inscriptions)
Technology points:
Use Shore A 10-15 ultra-soft silicone to avoid pulling fragile plaster during demolding;
Add 3% silicone oil to reduce viscosity and ensure that it penetrates into the cracks of cultural relics to replicate the internal structure.

(2)Mass production of art sculptures
Application:

plaster decorative ornaments, architectural relief molds
Process optimization:
Layered casting technology: first pour a 5mm thin layer to cover the details, and then pour a thick layer to enhance support;
Built-in glass fiber mesh cloth to improve the tear resistance of the mold (can withstand 10 times/day of plaster slurry casting).

3. Cultural and creative product development
Application: plaster aromatherapy candle mold, plaster painting DIY kit
Innovative design:
Modular silicone mold (with positioning pins) to achieve multi-component combination molding;
Built-in temperature sensor to monitor the exothermic process of plaster curing (to prevent silicone deformation).

3.Main feature :

1. Environmentally friendly, non-toxic, tasteless, non-corrosive, passed FDA food grade, MSDS, ROSH and other certifications.

2. Low viscosity, good fluidity, convenient operation and easy pouring; it can be cured at room temperature or heated.

3. Excellent physiological inertia, waterproof, ozone resistance and aging resistance, high tensile toughness, and many mold turning times.

4. High chemical stability, high and low temperature resistance, can be used for a long time and maintain its performance at -55°C to 220°C.

5. No low molecules are released during the cross-linking process, so the volume remains unchanged, the shrinkage rate is as low as 0.1%, and the precision is high.

4.Mold making process of RTV-2 platinum-cured 1:1 addition-type liquid silicone rubber
(1) Prototype preparation
Clean and process the mold prototype to ensure that the surface is smooth and free of impurities.
(2) Mixing and degassing
Mix components A and B in a 1:1 ratio, stir evenly and vacuum degas to avoid bubbles affecting the quality of the mold.
(3) Pouring and curing
Slowly pour the mixed silicone rubber onto the prototype to ensure that the details are completely covered.
Cure at room temperature or under heating conditions, usually for a few hours to a day.
(4) Demolding and post-processing
After curing, carefully demold and check the integrity and accuracy of the mold.
Surface treatment or secondary curing can be performed as needed.

5.Packing and shipping:
10Kg/set (A component 5Kg +B component 5Kg)
40Kg/set (A component 20Kg +B component 20Kg)
50Kg/set (A component 25Kg +B component 25Kg)

Packed in iron drum or plastic drum, transported as non-dangerous goods, sealed at room temperature 25°C, and protected from acid and alkali impurities, the storage period is 12 months.

6.Precautions :

1. Do a small amount of testing before use, and then put it into use.

2. Do not add color or powder to the silica gel at will before testing. Do not contact with water, acid, alkali or other organic matter containing sulfur, phosphorus and nitrogen, so as not to affect the curing of silica gel.

3. This product is a platinum catalyst silica gel, which cannot be in contact with condensation type silica gel. Before using the silica gel, tools and containers need to be cleaned with thinner water.

         4. If you need to color, please add the color paste to component B by 2/1000, and stir evenly.