China Liquid Mold Making Silicone for PU Castings, Find details about China Silicon Rubber, RTV Silicone Rubber for PU Fountaimaking from Liquid Mold Making Silicone for PU Castings
1.Condensation Silicone Rubber HY-635 is generally named two-component silicone rubber, white color, with mixing ratio of 2%~5%.
It is flowable liquid silicone & curing agent. It gets cured at room temperature 25ºC within 4-6 hours.
Very suitable for both pouring and brushing methods of operation for medium sized and large sized molds making.
2. Application
HY-635 is widely used to make molds for GRC products, such as GRC screen, GRC panels, etc.
It is also applicable for concrete stones, PU/poly resin products, unsaturated resin products, plaster products, fibreglass products, gypsums crafts, cement statues, etc.
3. Parameters
Model | HY-635 |
Appearance | white |
Mixing Ratio (%) | 3~5 |
Tensile-strength(kgf /cm2 ) | 4 |
Tear-strength (kgf /cm ) | 25±2 |
Elongation (%) | 450 |
Retractility(%) | ≤0.3 |
(Note: Other hardness is adjustable according to customers' requirements.)
4. Advantages
1). Low shrinkage
2). Good fluidity, good operability, good for pouring method;
3). Excellent mechanical properties, in particular tear strength and tensile strength;
4). High duplication times and repeated use;
5). High temperature resistance, High simulation;
6). Adjustable for various applications with various requirements on the operation time or curing time.
5. Operation Instructions
The mixing ratio & operation time
1). If you add curing agent 1%, the silicone material can be operated within 2.5 hours and the
mold can be demoulded after 6-8 hours.
2). If you curing agent 2%, the silicone material can be operated within 50 minutes to 1 hour and
the mold can be demoulded after 2-3 hours.
3). If you add curing agent 3%, the silicone material can be operated within 28 - 30 minutes and
the mold can be demoulded after 1.5-2 hours.
4). If you add curing agent 4%, the silicone material can be operated within 10- 15 minutes and
the mold can be demoulded after 1 -1.5 hours.
Product size & hardness
If the product is of small size with detailed patterns, the soft silicones 10 shore A to 20 shore A are recommended;
If the product is of very large size, the hard silicones 30 shore A to 40 shore A are recommended;
If the product is of large size with detailed patterns, the moderate silicone 30 shore A is recommended;