Can I use this silver paste to repair a broken laptop keyboard ribbon cable?

Yes, this conductive silver paste is ideal for repairing broken traces on flexible ribbon cables and laptop membrane keyboards. Because it applies as a liquid and cures without the extreme heat of a soldering iron, it will not melt or warp the delicate plastic film.

Is this conductive paste better than using a standard soldering iron?

This paste is not a complete replacement for structural soldering, but it is vastly superior for heat-sensitive materials like glass, PET film, and flexible circuits where a soldering iron would cause permanent damage. It is designed for restoring electrical continuity, not for bearing mechanical weight.

How long does it take for the silver paste to dry and become conductive?

The paste will dry to the touch at room temperature within a few hours, but its maximum conductivity is achieved when fully cured. For the best electrical performance and adhesion, we recommend curing the applied paste with a heat gun or oven at 145°C for approximately 5 minutes.

What should I do if the paste inside the syringe becomes too thick to dispense?

If the paste becomes too thick, ensure it has been removed from the refrigerator and allowed to reach room temperature before use. The manufacturer strictly advises against adding any thinners or diluents, as this will ruin the conductive properties and adhesion of the silver paste.

Can I buy this conductive silver pen in bulk for my repair shop in Hong Kong?

Yes, you can purchase the JASTON 0.3ml Conductive Silver Paste in bulk quantities at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po. Our physical store supplies many local electronics repair centers and STEM educators with professional-grade consumables.

0.3ml Conductive Silver Paste Syringe

Name: 0.3ml Conductive Silver Paste Syringe | PCB Trace Repair Pen
Brand: JATSON
SKU: 21PS002127
Price: 115.0 TWD
Availability: InStock

Short Product Description

The JASTON 0.3ml Conductive Silver Paste is a high-purity, quick-drying liquid wire solution designed for repairing broken PCB traces and flexible membrane switches. Featuring a 65% solid silver content and ultra-low resistance (<0.1 ohm/sq), this syringe applicator allows for precise micro-soldering alternatives without damaging heat-sensitive components. Available for instant pickup at Sun Cheong Computer Co. Ltd.(新昌電腦有限公司) in Sham Shui Po, our technical staff provides expert advice on using this conductive ink for your DIY electronics and STEM repair projects.

Key Features

High Silver Content: Contains 65% pure silver nanoparticles for maximum electrical conductivity and long-lasting oxidation resistance.
Ultra-Low Resistance: Achieves less than 0.1 ohm/sq resistance, ensuring stable power and signal transmission across repaired traces.
Precision Syringe Applicator: Includes two micro-needle tips for dispensing exact amounts of paste onto microscopic PCB pathways.
Broad Material Compatibility: Adheres strongly to PC, PET, PVC, PU, glass, and standard fiberglass circuit boards without flaking.
Heat-Free Repair Solution: Safely repairs heat-sensitive electronics like membrane keyboards and flexible ribbon cables without a soldering iron.
Quick-Drying Formula: Formulated to dry quickly at room temperature, allowing for rapid prototyping and emergency field repairs.

Full Product Description

Seamless Circuit Repair Without Soldering

This Conductive Silver Paste allows you to draw highly conductive electrical pathways, eliminating the need for a soldering iron on heat-sensitive components. It is the perfect liquid wire solution for repairing broken traces on flexible printed circuits (FPC), computer keyboards, and delicate membrane switches. The included micro-needles ensure you can apply the paste with pinpoint accuracy on microscopic board traces, restoring functionality to expensive electronics in minutes.

High Purity Silver for Low Resistance

Engineered with a 65% solid silver content, this Circuit Repair Ink guarantees exceptional electrical conductivity and long-term oxidation resistance. It achieves an ultra-low square resistance of less than 0.1 ohm/sq, ensuring your repaired circuits operate with minimal voltage drop and maximum signal integrity. This high-performance formulation is trusted by professionals for repairing critical EMI shielding, ITO films, and RFID antennas where standard solder cannot adhere.

Pro Tip from Our Technicians

Our Sham Shui Po technical team strongly advises storing this JASTON Silver Syringe in a refrigerator (below 23°C) to prevent the silver particles from drying out prematurely. Before application, allow the syringe to sit at room temperature for a few minutes to ensure a smooth, even flow. While the paste air-dries naturally, applying gentle heat with a hairdryer or heat gun (up to 145°C for 5 minutes) will significantly improve the final conductivity and mechanical adhesion of the silver trace.

Technical Specifications

Brand: JASTON (佳士頓)
Model: JSD-856YQ
Product Type: Conductive Silver Paste (Liquid Wire)
Volume: 0.3 ml
Solid Content: 65% Silver
Square Resistance: < 0.1 ohm/sq @ 1mil
Adhesion Strength: Passes 3M600 tape test (>8 times without shedding)
Curing Method: Room temperature air dry OR heat cure (145°C for 5 mins recommended)
Storage Requirement: Refrigerate below 23°C (Keep tightly sealed)
Package Contents: 1x 0.3ml Syringe, 2x Micro-needle dispensing tips

Delivery Options

Local delivery within Hong Kong and in-store pickup.
Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
In-store pickup details (location and time) will be confirmed by email or phone message.
Delivery times are estimates and may be affected by weather or unforeseen circumstances.

FAQ Section

Can I use this silver paste to repair a broken laptop keyboard ribbon cable?Yes, this conductive silver paste is ideal for repairing broken traces on flexible ribbon cables and laptop membrane keyboards. Because it applies as a liquid and cures without the extreme heat of a soldering iron, it will not melt or warp the delicate plastic film.
Is this conductive paste better than using a standard soldering iron?This paste is not a complete replacement for structural soldering, but it is vastly superior for heat-sensitive materials like glass, PET film, and flexible circuits where a soldering iron would cause permanent damage. It is designed for restoring electrical continuity, not for bearing mechanical weight.
How long does it take for the silver paste to dry and become conductive?The paste will dry to the touch at room temperature within a few hours, but its maximum conductivity is achieved when fully cured. For the best electrical performance and adhesion, we recommend curing the applied paste with a heat gun or oven at 145°C for approximately 5 minutes.
What should I do if the paste inside the syringe becomes too thick to dispense?If the paste becomes too thick, ensure it has been removed from the refrigerator and allowed to reach room temperature before use. The manufacturer strictly advises against adding any thinners or diluents, as this will ruin the conductive properties and adhesion of the silver paste.
Can I buy this conductive silver pen in bulk for my repair shop in Hong Kong?Yes, you can purchase the JASTON 0.3ml Conductive Silver Paste in bulk quantities at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po. Our physical store supplies many local electronics repair centers and STEM educators with professional-grade consumables.

Target Users / Applications

Electronics Repair Technicians: Restoring broken conductive traces on expensive laptop membrane keyboards and smartphone flexible printed circuits (FPC).
PC Modders & Overclockers: Reconnecting microscopic bridges on CPU or GPU substrates where traditional soldering is impossible due to space and heat constraints.
STEM Educators & Students: Drawing functional electrical circuits on paper or glass during science experiments to demonstrate conductivity without using hot soldering irons.