Tin Solder Paste, Rosin Solder Flux, Welding Material

Innovating Soldering Technology Since 2002

Guilin Runxin Electronic Material Tech Co., Ltd. is a leading manufacturer specializing in high-purity soldering materials, including tin solder paste, hydrogenated rosin, modified rosin, and specialized flux formulations. With over two decades of experience, we serve global electronics, automotive, aerospace, and industrial clients with reliable, high-performance solutions.

Our R&D-driven approach ensures continuous innovation in lead-free and low-residue formulations, meeting RoHS, REACH, and IPC standards. We focus on enhancing solder joint integrity, reducing defects, and improving throughput in SMT and wave soldering processes.

RunXin Tech

Guilin, China

Our Product Range

High-purity, stable, and customizable soldering materials engineered for performance, reliability, and compatibility across modern electronics manufacturing processes.

RHR-3131HS Hydrogenated Rosin

High-purity hydrogenated rosin with excellent thermal stability and low acidity. Ideal for flux and solder paste formulations requiring long shelf life and minimal residue.

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RHR-604 Hydrogenated Acrylic Resin

Modified acrylic resin with enhanced adhesion and compatibility in flux systems. Offers improved wetting and solder spread in high-reliability applications.

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RHR-3131CH Hydrogenated Rosin

Fully hydrogenated rosin with ultra-low unsaturation. Provides superior oxidation resistance and consistent performance in lead-free solder pastes.

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RHR-3250 Hydrogenated Rosin

Medium softening point hydrogenated rosin for balanced tack and flow. Suitable for no-clean and water-soluble fluxes.

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NR19 Lead-Free Tin Solder Wire

SAC alloy solder wire with low spatter and excellent wettability. Designed for precision hand soldering and rework applications.

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SAC0307 Silver Tin Solder Bar

High-reliability lead-free solder bar with 0.3% silver content. Ideal for automotive and industrial electronics requiring thermal fatigue resistance.

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SAC305 Silver Tin Solder Bar

Industry-standard SAC305 alloy with excellent mechanical strength and thermal cycling performance. Compatible with reflow and wave soldering.

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Sn60Pb40 Tin Lead Solder Bar

Traditional tin-lead alloy with excellent wetting and low melting point. Used in legacy systems and specific industrial applications.

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RXP-Z198-H-M305-T3 Lead-Free Solder Paste

No-clean, halogen-free solder paste with excellent printability and response-to-pause. Optimized for fine-pitch and 01005 components.

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RXP-Z198-H-M0307-T3 Lead-Free Solder Paste

High-reliability solder paste with SAC0307 alloy. Designed for harsh environments and high-temperature applications.

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RXP-A100-T Rosin Flux Paste

High-activity rosin-based flux paste for through-hole and mixed-technology assemblies. Provides excellent hole fill and reduced voiding.

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RX-M250 Modified Gum Rosin

Disproportionated and esterified rosin for enhanced solubility and stability in flux formulations. Reduces ionic residue and improves reliability.

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Industrial Applications

Our materials are trusted across critical sectors for their consistency, purity, and performance.

Electronic Welding

Widely used in organic synthesis, pharmaceutical intermediates, and as a surfactant in flux and solder paste production. Offers high resistance and strong activity, contributing to bright spots and full solder joints.

PCB & SMT Soldering

Essential in surface mount technology for reliable interconnections. Ensures consistent wetting, minimal voiding, and high first-pass yield in automated assembly lines.

Solder Materials

Core component in solder alloys and pastes. Enhances flow, reduces oxidation, and improves mechanical strength of solder joints in high-density circuits.

Adhesive Agent

Used as a tackifier and stabilizer in conductive adhesives and encapsulants. Improves bond strength and thermal stability in hybrid packaging.

Ink Printing

Applied in conductive inks and screen printing pastes. Provides viscosity control and adhesion in printed electronics and membrane switches.

Paint & Coating

Utilized in protective coatings for electronic components. Offers moisture resistance, dielectric strength, and long-term environmental protection.

Why Choose Runxin?

We deliver performance, reliability, and partnership in every product.

R&D Driven

Independent research and development ensures cutting-edge formulations tailored to evolving industry standards.

Cost-Effective

High-performance solutions at competitive prices, reducing total cost of ownership in production environments.

Customization

High-end customization for specialized needs, including alloy composition, flux chemistry, and packaging.

Quality Assured

High purity, quality stability, and long shelf life ensure reliability during storage and shipping.

Free Sample Testing

We support free sample testing (excluding shipping charges) to validate performance in your specific process.

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Soldering & Welding Articles

Insights and technical knowledge from our R&D team.

May 24, 2022

The Popular Types of Modified Rosin and Rosin Derivatives

Usually, modified rosin is obtained by disproportionation, addition, hydrogenation, and polymerization of the double bond of resin acid molecules and...

May 24, 2022

What Are Types of Natural Rosins and Processed Rosins?

Rosin refers to a non-volatile natural resin obtained from pine rosin through different processing methods. Rosin is an important chemical raw material,...

Mar 16, 2023

What Are Popular Industrial Applications of Rosin?

Rosin is a very important chemical raw material, widely used in various industrial sectors such as soap, papermaking, paint and coatings, ink, adhesive,...

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Advanced Soldering Materials

Innovating Soldering Technology Since 2002

Our Product Range

RHR-3131HS Hydrogenated Rosin

RHR-604 Hydrogenated Acrylic Resin

RHR-3131CH Hydrogenated Rosin

RHR-3250 Hydrogenated Rosin

NR19 Lead-Free Tin Solder Wire

SAC0307 Silver Tin Solder Bar

SAC305 Silver Tin Solder Bar

Sn60Pb40 Tin Lead Solder Bar

RXP-Z198-H-M305-T3 Lead-Free Solder Paste

RXP-Z198-H-M0307-T3 Lead-Free Solder Paste

RXP-A100-T Rosin Flux Paste

RX-M250 Modified Gum Rosin

Industrial Applications

Electronic Welding

PCB & SMT Soldering

Solder Materials

Adhesive Agent

Ink Printing

Paint & Coating

Why Choose Runxin?

R&D Driven

Cost-Effective

Customization

Quality Assured

Free Sample Testing

Soldering & Welding Articles

The Popular Types of Modified Rosin and Rosin Derivatives

What Are Types of Natural Rosins and Processed Rosins?

What Are Popular Industrial Applications of Rosin?

Stay Updated

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