Chemtronics CW2205, CircuitWorks Conductive Paint
Chemtronics CW2205 — CircuitWorks Conductive Paint, 5g Bottle with Applicators
Chemtronics CW2205 CircuitWorks Conductive Paint (SKU: CW2205) is a highly conductive silver-based paint for repairing PCB traces, linking components, making jumpers, and patching EMI shielding on circuit boards. Conductivity of 0.02–0.05 ohms/sq/mil. Dries tack-free in 3–5 minutes at room temperature; achieves electrical conductivity within 30 minutes. Heat cure at 250–300°F (120–150°C) for maximum conductivity, durability, and chemical resistance. Excellent adhesion to most electronic materials. Supplied in a 5g bottle with 1 pick, 2 small brushes, and 2 lint-free foam swabs.
Key Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | CW2205 |
| Conductive Material | Silver |
| Net Weight | 5g (0.18oz) |
| Resistivity | 0.02–0.05 ohms/sq/mil |
| Tack-Free Time | 3–5 minutes at room temperature |
| Electrical Conductivity | Within 30 minutes at room temperature |
| Heat Cure | 5 minutes at 250–300°F (120–150°C) for maximum performance |
| Operating Temperature | Up to 400°F (205°C) |
| Included Applicators | 1 pick, 2 small brushes, 2 lint-free foam swabs |
| Brand | Chemtronics |
Key Features
- High electrical conductivity — 0.02–0.05 ohms/sq/mil silver traces for reliable circuit repair and prototyping
- Fast drying — tack-free in 3–5 minutes; electrically conductive within 30 minutes at room temperature
- Multiple applicators included — pick for precision trace repair; brushes and swabs for larger areas like EMI shielding patches
- Excellent adhesion — bonds to most electronic substrate materials including FR4, ceramic, and metal
- High operating temperature — rated to 400°F (205°C) after heat cure
- Single-component — no mixing required; ready to use directly from the bottle
Applications
- PCB trace repair and rework
- Solderless component linking and jumpers
- EMI/RFI shielding repair and patching
- Solderable terminations on ceramic and hybrid substrates
- Quick prototype circuit modifications
- Conductive adhesive bonding for small components
Frequently Asked Questions
How do I apply CW2205 for precision trace repair?
Use the included pick for fine, precise trace repair work — the pointed tip allows you to draw narrow conductive lines along damaged or broken PCB traces. For wider areas such as EMI shielding patches, use the included brushes or foam swabs. Apply in thin, even coats and allow to dry between coats if building up thickness. Clean applicators immediately after use with isopropyl alcohol before the paint cures.
Do I need to heat cure CW2205?
Heat cure is optional but recommended for maximum conductivity, durability, and chemical resistance. At room temperature, CW2205 is tack-free in 3–5 minutes and electrically conductive within 30 minutes — sufficient for most rework and repair applications. For production use or applications requiring maximum performance, cure for 5 minutes at 250–300°F (120–150°C).
Can CW2205 be soldered over?
Yes — CW2205 can be used to create solderable terminations on ceramic and hybrid substrates. The silver-based formulation is compatible with standard soldering processes. Ensure the paint is fully cured before soldering. Refer to the Chemtronics TDS for soldering compatibility details.
How does CW2205 compare to conductive epoxy for trace repair?
CW2205 is a single-component paint that dries quickly at room temperature — ideal for fast rework and repair without mixing or extended cure times. Conductive epoxies (like Chemtronics CW2460) are two-part systems that offer higher bond strength and are better suited for structural bonding of components. For trace repair and EMI shielding, CW2205 is the faster, more convenient choice.
