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{"title":"Liquid Silicone Rubber For Mold Making RTV Silicone Material Mold For Gypsum","imgUrl":"https:\/\/img.chinax.com\/nimg\/32\/34\/745fe33f2dfa0ea74617586d6e56-200x200-1\/liquid_silicone_rubber_for_mold_making_rtv_silicone_material_mold_for_gypsum_sculpture_plaster_silicone_rubber_manufacturer.jpg","attrs":{"Brand Name":"Hanast","Model Number":"HN-620 A\/B","Certification":"ROHS\uff0cSGS","Place of Origin":"Guangdong, China"}}
{"title":"Condensation Cure Liquid Silicone Rubber Low Shrinkage One To One Ratio For","imgUrl":"https:\/\/img.chinax.com\/nimg\/95\/d4\/54f58e29ce5454b977df8d20423a-200x200-1\/condensation_cure_liquid_silicone_rubber_low_shrinkage_one_to_one_ratio_for_sculpture_casting_molds.jpg","attrs":{"Model Number":"HN-620 A\/B","Feature":"Environmentally friendly","Payment Terms":"T\/T","Hardness":"35 Shore"}}
{"title":"High Tear Resistance Liquid Silicone Rubber for Room Temperature Curing with Low","imgUrl":"https:\/\/img.chinax.com\/nimg\/7b\/2e\/5b9c4b073a4918911fcbe50e1de9-200x200-1\/high_tear_resistance_liquid_silicone_rubber_for_room_temperature_curing_with_low_shrinkage.jpg","attrs":{"Model Number":"HN-620","Color":"Transparent","Brand Name":"Hanast","Appearance":"Liquid"}}
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HN-620 A/B is an industrial-grade, two-part condensation cure liquid silicone rubber system with a standard mixing ratio of 100:2 by weight. This RTV (Room Temperature Vulcanizing) silicone rubber features strong fluidity and high temperature resistance, making it ideal for plaster casting molds and various industrial applications.
Primary Applications
Mold making and replication of large stone pieces, gypsum & cement components
Cultural stone, artificial stone, Roman columns, and stone carvings
Architectural and decorative materials production
Split molds for resin crafts, gypsum artworks, and handmade soap
Tire casting molds and other industrial applications
Technical Specifications
Parameter
Value
Model
HN-620AB
Viscosity (cs)
170,000
Feature
High temperature resistance
Hardness (A°)
20
Elongation (%)
600-720
Tear Strength (kN/m)
19.8-24.3
Linear Shrinkage (%)
≤0.2
Curing Agent Addition Ratio (%)
2-3%
Operating Time (mins)
30-40
Curing Time (hours)
3-4
Key Features
Strong tear resistance with excellent high and low temperature performance
Acid and alkali resistance with superior aging resistance
Excellent fluidity for easy release and demolding without white residue
Long service life with high frequency mold turnover capability
Minimal linear shrinkage rate (less than 0.2%)
Customizable color, hardness, viscosity, and operating time available
Application Instructions
Thoroughly shake Part B curing agent before use. Weigh Parts A and B at 100:2 ratio and mix uniformly, ensuring complete blending by scraping container sides and bottom.
Vacuum deaerate the blended compound for no more than 10 minutes to avoid over-extended vacuuming.
Allow full room-temperature curing for approximately 4 hours. Heating is not required, but if thermal acceleration is needed, maintain temperature below 100°C.
For optimal mold performance, allow a full 24-hour post-curing rest before demolding or application.