Two Component Tin Catalyzed RTV Silicone Rubber 20 Shore A Liquid for Mass Production Molds

Two Component Tin Catalyzed RTV (Condensation Cure) Liquid Silicone Rubber — HN-620 A/B

HN-620 A/B is a two-component, tin-catalyzed RTV2 condensation cure liquid silicone rubber specially developed for flexible, high-precision mold production. Activated by a tin catalyst and mixed at 100:2–3, it vulcanizes at room temperature and delivers ultra-fine pattern replication with remarkable tear resistance for high-volume, repeatable mass production mold making.

Tin Cure vs Platinum Cure — Why Choose Condensation Cure

Distinct from platinum-cured (addition-cure) silicones, this condensation-cure silicone offers zero cure inhibition: it cures completely even in contact with difficult substrates such as sulfur-containing clay, timber, 3D-printing resin and gypsum. It is a highly reliable and cost-efficient alternative to platinum silicone for industrial and craft mold making. A full technical data sheet (TDS) and MSDS are available on request.

Key Features

• Zero cure inhibition — compatible with nearly all model materials, no sticky uncured residue
• High tear and tensile strength; flexible 10–35 Shore A molds, easy demolding of complex undercuts
• Low viscosity and great flow — fills micro gaps to reproduce sharp detail
• Economical — professional performance at far lower cost than platinum silicone
• Customizable curing speed — adjust tin catalyst proportion to suit workshop temperature
• Non-hazardous for transport; non-toxic and low odor

Technical Specifications

Applications

• High-volume mass production molds and industrial mold making
• Statue and sculpture casting (concrete, gypsum, plaster, resin)
• Architectural restoration — cornices, stone veneers and building decorative parts
• Arts & crafts durable molds for candles, soap and polyurethane casting

Packing & Trade Information

• Packing: 25KG / 200KG iron drum
• Place of Origin: Guangdong, China
• Certification: MSDS available; shipped as non-hazardous goods
• Minimum Order Quantity: 1 kilogram
• Delivery Time: 5–7 days
• Payment Terms: T/T
• Custom formulation: available (OEM/ODM)