Category overview

Vulcanizing Agents (Activators)

Based on 57 products - Last update on the Jun 26, 2025

Vulcanizing activators in plastics are additives used to enhance the vulcanization process, which is crucial for improving the mechanical properties of rubber and elastomeric materials. These activators typically appear as fine powders or liquids. Key features of vulcanizing activators include their ability to improve processing efficiency, reduce curing time, increased elasticity, strength, and durability. They are suitable for applications in automotive parts, industrial seals, and footwear.

Alternatives to vulcanizing activators include accelerators and curing agents. Sub-types include metallic oxides and organic compounds.

Applications

Automotive14 products

Wiring & Cables9 products

Sealants, Seals & Gaskets4 products

Claims / benefits

Crosslinking/ Hardening, ...16 products

Vulcanization, Excellent13 products

Weatherability, Good8 products

Properties

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Casilane HP-669

by Thomas Swan

Casilane HP-669 by Thomas Swan is a sulphur silane coupling agent. It acts as a chemical intermediate and crosslinking agent. It also acts as a vulcanizing agent and activator in the rubber industry due to the presence of four sulphur atoms in its structure. <br> <ul style="padding-left: 40px;"><li>It enhances performance by incorporating fillers like silica, fiberglass, talc, mica, and clay, boosting filler–rubber interaction to increase abrasion resistance and overall durability. </li> <li>It is suitable for use in NR, IR, SBR, BR, NBR, and EPDM rubber compounds. </li> <li>It features poly-sulphidic alkyl structures that align with sulphur deoxidation rates, resisting oxidative degradation while improving heat resistance and crack fatigue performance. </li> <li>It reduces puncture risk, rolling resistance, fuel consumption, and carbon-dioxide emissions, supporting carbon reduction efforts and ensuring environmental compliance. </li> <li>It acts as a reinforcing agent, enhancing filler performance and significantly improving rubber’s abrasion resistance. </li> <li>Casilane HP-669 boosts cut and pressure resistance while reducing hysteresis loss and moisture absorption, thereby enhancing mechanical strength, adhesion, thermal aging resistance, modulus, and flex life. </li> <li>It strengthens the bond between substrates and adhesives or coatings, resulting in products that are more durable, reliable, and long-lasting. </li> <li>It enhances mechanical properties like tensile strength, modulus, and elongation, making materials tougher, more flexible, and resilient. </li> <li>It improves chemical resistance, increasing stability, consistency, and product lifespan. </li> <li>It is used in the manufacturing of tires, hoses, rollers, belts, cables, footwear, and molded rubber parts. </li> <li>Recommended dosage is 1.0-4.0 PHR. </li> <li>It has a shelf life of over 2 years. </li></ul>

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Dynamar™ RC 5251Q

by 3M

Dynamar™ RC 5251Q by 3M is sodium carbonate cure activator and acid receptor for ECO compounds. It is used as part of a cure system for vulcanizing polyepichlorohydrin elastomers. This additive provides excellent scorch resistance, significant rheological flexibility, good heat aging and good compression set resistance. Dynamar™ RC 5251Q is used in veneer fuel and filler hose constructions. Recommended for rubber and plastic industry.

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Luperox® DCP

by Arkema

Luperox® DCP by Arkema acts as a polymerization initiator, vulcanizing and crosslinking agent. It is dicumyl peroxide (DCP). It is compatible with thermoplastic elastomer vulcanizates, polypropylene and expandable polystyrene.<br> <ul style="padding-left: 40px;"><li> It is suitable for use as finisher and as synergist for fire retardant EPS applications.</li> <li> Luperox® DCP can be processed at temperatures up to 250°F (121°C) and can be cured at temperatures above 300°F (149°C).</li> <li> It is recommended for general & renewable energy applications such as wire and cable.</li> </ul>

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Thomas Swan

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Arkema

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