Mechanic SU7 Black High-Viscosity UV Curing Solder Mask Ink (10cc Syringe) – Rapid Hardening PCB Insulating Oil for Phone Repair

Overview 

The Mechanic SU7 is a next-generation, high-viscosity black UV curing solder mask ink engineered specifically for high-precision micro-soldering and complex motherboard trace restoration. Unlike standard low-viscosity solder masks that bleed or run across delicate components, the SU7 gel-paste formula stays exactly where you apply it. It cures rapidly under ultraviolet light to form an ultra-tough, high-temperature dielectric barrier. Its deep OEM-black pigment matches modern smartphone PCBs, making it the preferred choice for fixing 0.01mm flying jumper wires, isolating exposed BGA pads, and reinforcing reconstructed board corners.

Key Features 

• High-Viscosity Gel Formula: Does not run, slump, or spread onto adjacent solder pads, allowing pinpoint micro-dot application under a microscope.

• Rapid Multi-Layer UV Curing: Formulated with photo-initiators that penetrate deep black pigmentation, hardening completely in 3 to 10 seconds under a 395nm UV lamp without leaving a sticky surface film.

• High Dielectric Insulation: Provides robust electrical resistance against parasitic capacitance, cross-talk, and high-voltage short circuits on multi-layer smartphone logic boards.

• High-Temperature Resistance: Withstands hot-air reflow and soldering iron contact up to 300°C+ without cracking, peeling, or degrading.

• OEM-Grade Factory Finish: Blends invisibly with dark iPhone and Android motherboards for a clean, commercial-quality repair result.

Technical Specifications 

Common Applications 

• Anchoring ultra-fine 0.01mm and 0.02mm enameled copper jumper wires on iPhone and Android motherboards

• Rebuilding missing or broken BGA pads and insulating under-chip trace jump channels

• Covering exposed copper, scratched ground planes, and repaired traces after pad scraping

• Shielding light-sensitive IC sensors (Face ID, proximity, ambient light flex cables) from light bleeding