UV Curable Coatings

Humiseal UV40 Series Polyurethane

HumiSeal® UV40 is a single component, high solids, UV curable, acrylated polyurethane conformal coating that possesses excellent chemical resistance, surface hardness, flexibility and moisture resistance. The material is tack-free after exposure to UV light. A secondary moisture cure mechanism will cure unexposed areas of the coating within 2-3 days at ambient conditions. The coating fluoresces under UV light to allow for coating inspection and can be applied by selective coating equipment. HumiSeal® UV40 coating is recognized under UL File Number E105698, is MIL-I-46058C qualified and is IPC-CC-830 and RoHS Directive 2002/95/EC compliant.


HumiSeal® UV40 can be applied via standard selective coating equipment or by conventional hand spray equipment. The source air used for spraying must be dry (a dry inert gas is highly recommended) to prevent premature curing of the secondary cure mechanism. The spraying should be done with adequate ventilation so that the vapour and mist are carried away from the operator.


HumiSeal® UV40 may be applied by brush for rework or touch up only. Brush must be cleaned with solvent promptly after use.

Clean Up

To flush equipment and clean uncured HumiSeal® UV40, non-alcohol based solvents should be used. HumiSeal® Thinner 600 is recommended.


HumiSeal® UV40 is a highly cross linked UV cured coating. The cured film has a high degree of environmental and chemical resistance and will be more difficult to remove than traditional conformal coatings. Thermal displacement, mechanical abrasion and, where avaliable, HumiSeal® Stripper 1100 are suitable options for rework of HumiSeal® UV40.

HumiSeal® U40 is a tough, durable coating offering best in class performance for a conformal coating.Also UV40 exhibits flexibility not seen in traditional
UV Curable Polyurethanes. If you need the best MVP performance , great chemical reisitance and fast processing then UV40 should be suitable
The product comes in a few other derivatives
UV40-250 (Low Viscosity version)
UV40-HV ( High viscosity version)

UV40-GEL ( Gel Version usually dispensed)

UV40-Solar (Designed for Solar applications with high UV Radiation resistance, It meets the requirements of SAE-J-1960 standard (QUV accelerated age testing).

ONBoard Solutions offers SMT Production Solutions, Inline Printers, PCB printers, SMT assembly machines, Thermal Reflow Ovens, Wave Soldering, Conformal Coating, PCB Cleaning, Rework, Soldering, Desoldering and Rework Stations, Dispensing Units, Fume Extractor, Static Controls, DIE Bonders, Wire Bonders, Dicing Systems, Wafer Mounting System, Precision Cleaning, Lead free Solder Paste, Leaded Solder paste, Solder Wire, Flux, Epoxies, SMT Adhesives, UV Curable, Underfill, Precision Cleaners, Bonding Wire, Capilliary Tubes, Nozzles, Solder Tips, Air Showers, Pass Boxes, Transfer Hatches, Fan Filter Units, Laminar Flow Cabinets, Straddle Units, Modular Clean Rooms, disposable gloves, sterile gloves, ESD chairs, sticky mats, disposable garments, wipers, disinfectants.