The Automotive Electronics Environment
- 🌡️ Extreme temperature range — Arctic cold starts (−40°C) to engine bay heat (+120°C continuous)
- 💧 Water and humidity exposure — rain ingress, car wash, condensation in sealed enclosures
- 🔃 Constant mechanical vibration — engine, road surface and suspension fatigue solder joints
- 💨 Exhaust gases and fuel vapours — chemical attack on unprotected copper traces
- ⚡ High-voltage circuits — EV battery management, ignition, HID lighting
- 🧂 Road salt and de-icing chemicals — highly aggressive to PCB metals and finishes
Acrylcoat SKR-70 — Full Technical Specifications
| Product Code | ACRYLCOAT – SKR-70 |
| Appearance | Clear, Transparent, Smooth & Glossy |
| Drying / Cure | 80°C for 60 minutes in oven |
| Full Cure Time | 24 hrs initial | 7 days optimum properties |
| Max Working Temperature | 120°C continuous |
| Dielectric Strength | 25 kV/mm |
| CTI Value | 600 (Comparative Tracking Index) |
| Viscosity | 120–150 Secs FC B4 @ 30°C |
| Flammability | Self-extinguishing (coating) | Liquid: flammable |
| Anti-Fungal | Yes — prevents mold growth |
| Environmental | 100% Ozone-friendly | RoHS-aligned |
| Rework | Elclean Thinner AR solvent |
| Packaging | 1L × 8 | 5L × 3 | 25L drums |
| Shelf Life | 12 months in original sealed containers below 40°C |
Automotive PCB Applications
ECU / TCU
Engine and transmission control units
ABS / ESP
Braking and stability control electronic modules
ADAS Boards
Advanced driver assistance system PCBs
EV BMS
Electric vehicle battery management systems
Infotainment
Head units, instrument cluster, display boards
Auto LED Drivers
Headlights, DRL, OLED interior lighting boards
HVAC Controllers
Climate control electronic assemblies
Power Steering
Electric power steering (EPS) control modules
Automotive Industry Countries CONINS Serves
- 🇩🇪 Germany — BMW, Bosch, Continental, ZF, Hella supply chain electronics
- 🇮🇳 India — Pune, Chennai, Manesar auto clusters; Tata, Mahindra, Maruti Suzuki suppliers
- 🇻🇳 Vietnam — Vinfast suppliers, automotive parts manufacturers in Hanoi & Binh Duong
- 🇹🇭 Thailand — Southeast Asia's primary automotive manufacturing hub (Toyota, Honda)
- 🇰🇷 South Korea — Hyundai, Kia, Mando electronics supply chain
- 🇯🇵 Japan — Toyota, Honda, Denso, Aisin supplier network
Application Process for Automotive ECUs
Pre-Clean PCB
Clean automotive PCB with ELCLEAN E-Clean Spray. Automotive boards often have complex assemblies — use Elclean Liquid for thorough dip cleaning if needed.
Pre-Dry at 60°C
Pre-dry for 15–20 minutes. Automotive ECU boards can absorb moisture in assembly — thorough pre-drying is essential before SKR-70 application.
Selective Masking
Mask automotive connectors (Deutsch, Molex), high-current busbars, mounting holes, heat-sink contact areas and any press-fit connector zones.
Apply Acrylcoat SKR-70
Apply by dispenser (preferred for automotive production for precision control) or brush. SKR-70's viscosity (120–150s FC B4) is optimised for dispensing. Apply 2 coats for maximum automotive-grade protection.
Oven Cure
Cure at 80°C for 60 minutes minimum. For full automotive-grade performance, allow 7 days complete cure before thermal cycling or vibration testing.
EV Application Note: For EV battery management system (BMS) PCBs operating at high bus voltages (400V, 800V), Acrylcoat SKR-70's 25 kV/mm dielectric strength provides robust insulation. Always apply a minimum 2-coat process on BMS boards for maximum creepage distance protection.