Applying conformal coating manually with a brush results in uneven coverage, drips, and missed areas — especially between fine-pitch SMD components. For reliable, repeatable results in production, the External Dispensing Spray Pump (also called coating dispenser, conformal coat applicator, precision aerosol pump or PCB spray coating gun) is the right tool for professional results.

Problems with Manual Brush Application

  • ❌ Uneven film thickness — brush strokes create thick and thin areas, reducing protection uniformity
  • ❌ Drips and runs on vertical PCB areas cause bridging between component leads
  • ❌ Missed areas — under low-profile SMD components, between connector pins, PCB edges
  • ❌ Slow throughput — limits production capacity per shift
  • ❌ Operator dependency — quality varies between operators and production runs

CONINS External Dispensing Spray Pump — Key Advantages

  • ✅ Uniform coating thickness — fine mist atomisation eliminates brush marks and drips
  • ✅ Faster application — covers a full board in seconds vs minutes for brushing
  • ✅ Less material waste — fine spray deposits coating precisely with minimal overspray
  • ✅ Reaches all areas — between components, under heatsinks, around connectors
  • ✅ Consistent quality — same film thickness board after board, operator after operator
  • ✅ Full Acrylcoat compatibility — works with all CONINS Acrylcoat products: AR-30, ALQ series, SKR-70, LED-LGT-SPL-60, G1/G2/G3 and Black coating

How to Use the CONINS Dispensing Spray Pump

1

Setup & Connect

Attach the pump securely to your Acrylcoat bottle or container. Connect to compressed air at 2–4 bar (29–58 PSI). A standard workshop compressor is sufficient — no specialised equipment needed.

2

Test Spray Pattern

Test the spray pattern on a scrap board or paper before production use. Adjust the spray volume control knob until you achieve a fine, even mist — not large droplets or dry powder.

3

Apply Coating

Hold the pump nozzle at 150–200mm from the PCB surface. Apply in smooth, overlapping passes at consistent speed. Work methodically from one end of the board to the other. Maintain a steady hand speed for uniform film thickness.

4

Oven Cure

Transfer coated boards to oven immediately after application. Cure per Acrylcoat product instructions: 80°C for 60 minutes. Do not allow coating to fully air-dry at room temperature before oven cure — this can lead to uneven solvent evaporation.

5

Clean Pump After Use

Flush the pump immediately after use with Elclean Thinner AR. Run thinner through until the spray comes out completely clear. Leaving coating in the pump dries and blocks the nozzle — always clean after every production run.

Best Application Scenarios by Product

Production ScenarioWhy Spray Pump ExcelsRecommended Acrylcoat
LED board coating linesRapid application on multiple LED panels; consistent thickness on MCPCBsLED-LGT-SPL-60
Automotive ECU productionEven, controlled thick coat on complex 3D board assembliesSKR-70
Small/medium EMS shopsCost-effective professional quality vs expensive selective coating machineALQ-60
Outdoor / tropical electronicsFull uniform G2/G3 coverage for moisture-critical productsG1/G2/G3
IP protection coatingEven 2-coat opaque coverage for IP protection boardsOpaque Black

Frequently Asked Questions

What air pressure does the CONINS spray pump need? ▼
Standard compressed air at 2–4 bar (29–58 PSI) is suitable for the CONINS External Dispensing Spray Pump. A basic workshop compressor is sufficient — no specialised high-pressure or oil-free air supply is required, though clean dry air gives the best spray pattern.
Can the spray pump be used with all Acrylcoat products? ▼
Yes. The CONINS External Dispensing Spray Pump is compatible with all liquid Acrylcoat conformal coatings including AR-30, ALQ-30, ALQ-60, ALQ-100, SKR-70, LED-LGT-SPL-60, G1/G2/G3 and Opaque Black coating. Thin with Elclean Thinner AR if needed to achieve optimal spray viscosity.
How do I clean the spray pump to prevent clogging? ▼
Flush the pump immediately after each production session using Elclean Thinner AR. Run thinner through the pump until the spray comes out completely clear and solvent-only. Never leave Acrylcoat coating in the pump overnight — acrylic coatings will polymerise and permanently block the nozzle and tubing.