GRC Casting Silicones | High Tear Strength RTV Material

Durable GRC Casting Silicone is ideal for molding both simple and intricate designs, including GRG and GRC, cement, and other architectural decorations.

GRG is Reinforced concrete and GRC is glass-fiber-reinforced gypsum.

It offers excellent resistance to heat, deformation, acids, alkalis, and expansion, ensuring precise reproduction with fine detail in the molding process.

Appearance of GRC Casting Silicones

• Part A: Silicone Rubber is an white liquid or tranlucent liquid
• Part B: Catalyst is an non-toxic and odorless liquid in transparent color.
• ATT: we can provide catalyst of Fast, Medium,Slow based on hot ,cold, warm season.

Features of GRC Casting Silicones

• Amazing fluidity and easy to operate
• Delicate design available
• Non Oily
• Non-toxic and odorless catalyst Provided
• Easy de-molding with Excellent tension and tear strength
• High performance in duplication
• almost nil shrinkage below 0.2
• Excellent resistance to weather, temperature, aging, acid & aging-Proofing.

Datasheet of GRC Casting Silicones

Item	Condensation Silicone Rubber
Product (Catalyzed A+B)	XL-8825	XL-8830	XL-8835	XL-8840
Hardness ( A)	25±2	30±2	35±2	37-39
Specific Gravity (g/cm3)	1.04-1.08	1.04-1.08	1.04-1.08	1.01-1.06
Mix Ratio ( A:B by Weight)	100:3	100:3	100:3	100:3
Color	white	white	white	white
Pot life (mins) at 25°C	30-40	30-40	30-40	30-40
Cured time (Hours) at 25°C	8-12	8-12	8-12	8-12
Viscosity (mPa.s)  Base A	25000±2000	27000±2000	27000±2000	20000±2000
Viscosity (mPa.s)  Catalyst	NMT 80cps	NMT 80cps	NMT 80cps	NMT 80cps
Mixed Viscosity (mPa.s)	25000±1000	27000±1000	27000±1000	20000±1000
Tensile -Strength (M.pa)	3.8±0.3	4.2±0.3	4.1±0.3	3.2±0.3
Tear-Strength (kN/m)	24±2	25±2	26±2	18±2
Elongation (%)	450	460	480	320
Shrinkage (%)	0.3	0.3	0.3	0.3

  The Pictures of tin cured silicone rubber

 

Storage & Shelf Life

Store in a cool, dry place at room temperature (around 25℃). Shelf life is at least 1 year when stored properly.

Shipping Details

– Shipping Method: By Sea only (not available by air due to liquid restrictions).
– Minimum Order Quantity (MOQ): 200 kg
– Availability: Online purchasing is not supported. Please contact us directly for inquiries and orders.

 

Caution – Safety First
1. Keep away from food, drinking water, and other consumables.
2. Ensure it is kept out of reach of children.
3. Handle with care and ensure proper ventilation. Skin and eye contact may cause irritation. If eye contact occurs, rinse with water for 15 minutes and seek medical help. Use a waterless hand cleaner, then wash with soap and water to remove from the skin.