Humiseal 1a68 -

Single-component polyurethane with no free isocyanates, making it a safer alternative for operators.

| Problem | Likely Cause | Solution | |---------|--------------|----------| | Orange peel | Wrong thinner or pressure | Use Humiseal Thinner 600, reduce pressure | | Fish eyes | Contamination (oil, silicone) | Clean PCB with Humiseal 1B73 cleaner | | Cracking | Too thick coating | Apply in thinner layers (2–3 passes) | | Poor adhesion | Incomplete cleaning | Plasma clean or saponifier wash | humiseal 1a68

Best for small-scale applications or selective rework where precision is required. Curing Schedule It is particularly valued for its balance of

HumiSeal 1A68 is a high-performance, single-component polyurethane conformal coating designed to protect printed circuit boards (PCBs) from harsh environmental conditions. It is particularly valued for its balance of chemical resistance and ease of application. Caplinq +1 Key Characteristics Chemistry: It is a moisture-curing urethane coating. Protection: Offers superior resistance to chemicals and abrasion. Inspection: The coating contains a UV tracer, allowing it to fluoresce under blacklight for easy visual inspection of coating coverage. Compliance: It is IPC-CC-830 compliant, RoHS compliant, and UL recognized. Caplinq +2 Application & Curing Versatility: Can be applied via spraying, dipping, or brushing. Cure Profile: It cures at room temperature through reaction with atmospheric moisture, though the process can be accelerated with mild heat. Repairability: While it provides a tough, durable finish, it can be removed using specific strippers if board repair is necessary. Caplinq +2 Primary Use Cases It is typically selected for general PCB applications where standard acrylics might not provide enough chemical or mechanical protection, but where the extreme flexibility of a silicone isn't required. Detailed safety and handling protocols can be found in the HumiSeal 1A68 Safety Data Sheet provided by ConRo . Are you looking for specific Inspection: The coating contains a UV tracer, allowing

Unlike many urethane coatings, 1A68 contains no free isocyanates , reducing health risks for operators during application.

Heavy machinery and instrumentation panels in high-dust or chemical-heavy environments. HUM 1A68 - Chase Corporation

: Ensure PCB is clean, dry, and free of ionic residues. Use Humiseal 1B73 (acrylic) if you need easier rework.