HUMISEAL HumiSeal UV92 (55-CC-SYRINGE)

HumiSeal® UV92 Masking

Overview

HumiSeal® UV92 is a soft, one-part, UV-curable masking material designed to provide temporary protection of keep-out areas during conformal coating processes. Its shear-thinning viscosity allows easy dispensing and application, while full UV curing creates a reliable barrier preventing unwanted coating ingress. The material offers excellent solvent resistance and can be easily removed by peeling without leaving residue that could affect subsequent operations.

Key Technical Specs

• Product Type: UV-curable temporary masking material
• Chemical Class: Urethane acrylate
• Appearance: Milky white
• Specific Gravity: 1.04 @ 25°C
• Viscosity: Thixotropic paste
• Hardness: 40 Shore A
• Elongation at Break: >200%
• Glass Transition Temperature (Tg): -50°C
• Operating Temperature Range: -50°C to 150°C
• Shelf Life: 12 months (stored at 18 ±10°C)

Key Features & Benefits

• 100% UV cured for fast and reliable masking performance
• Easy application through syringes or automated dispensing systems
• Excellent solvent resistance during coating operations
• Provides clean protection of electrical contact areas
• Does not tarnish gold, tin, copper, phosphor bronze, or Sn/Pb solder surfaces
• Soft and flexible cured material allows easy removal
• Leaves no residue after peeling
• REACH and RoHS compliant

Typical Applications

• Printed circuit board (PCB) masking during conformal coating
• Protection of electrical contacts and connectors
• Temporary masking of keep-out areas
• Aerospace and electronic assembly protection processes

Application Guidelines

• Apply HumiSeal® UV92 to areas where conformal coating is not required
• Maximum recommended application thickness: up to 5 mm
• Cure fully using recommended UV exposure before applying conformal coating
• Remove after coating by gently peeling away from the protected surface

Curing Requirements

• UV-LED curing: 365 nm or 405 nm wavelength
• Compatible with H-type microwave or arc lamps
• Minimum UV power: 200 mW/cm²

Compatibility & Safety Notes

• Clean-up solvent: Isopropyl alcohol
• Store in tightly closed containers away from direct sunlight
• Recommended storage temperature: 8°C to 28°C
• Use only in well-ventilated areas
• Avoid contact with skin and eyes
• Refer to Safety Data Sheet before use

Packaging & Procurement

• Available in bulk containers and syringes
• Suitable for manual and automated dispensing applications

Why This Product is Chosen for AOG / MRO

• Provides reliable temporary protection during coating processes
• Fast UV curing reduces production and repair turnaround times
• Clean peel removal minimises rework requirements
• Protects sensitive electrical connection points from contamination

Practical Suggestions for Your Team (AOG Mindset)

• Confirm UV curing equipment output before processing
• Apply only to clean, dry surfaces for optimum adhesion
• Avoid excessive thickness beyond recommended limits
• Remove masking carefully to prevent damage to delicate components

Manufacturer / Product Codes

• Product Name: HumiSeal® UV92 Masking
• Product Type: UV-curable temporary masking compound
• Application: PCB and electronic coating protection
• Manufacturer: HumiSeal® / Chase Corporation