Applications

ONATHANE® CE-1164 – Fast-curing polyurethane conformal coating for electrical insulation and moisture protection on PCBs

Item Name: CONATHANE® CE-1164
Manufacturer: ELANTAS PDG, Inc.
Technologies: Single-component solvent-borne polyurethane conformal coating
Color: Clear light amber
Cure Type: Moisture cure (tack-free in 20–30 min, fully cured in 24 h at 25°C; optional post-cure 5–7 days)
Package Size: Contact to Techniq VN for details.
Shelf Life: 12 months

1. Product Overview

CONATHANE® CE-1164 is a single-component, solvent-borne, transparent polyurethane conformal coating. It is fast-curing, flexible, and provides excellent electrical insulation and moisture protection. The coating is QPL listed for MIL-I-46058C (Type UR), UL 94 V-0 rated, fluorescent under UV light, and exhibits excellent adhesion to phenolic and epoxy-glass laminates.


2. Applications

  • Thin-film protection of components and printed circuit boards (PCBs).

  • Electrical and moisture barrier for assemblies in harsh or humid environments.

  • Suitable for spray, dip, or brush applications.

  • Recoatable and solder-through for rework.

3. Typical Properties

Table 1 – As Supplied (Unmixed)

Property Condition Value Unit
Viscosity 25°C 100 cP
Specific Gravity 25°C 1.05
Appearance Clear, light amber
Solids content 135°C, 45 min 50 %
Flash point (ASTM D93) 45 °C
VOC (ASTM D3960) 4.4 lb/gal
Shelf life ≤ 25°C 12 months

Table 2 – Curing Schedule

Property Condition Value Unit
Tack-free 25°C 20–30 min
Full cure 25°C 24 h h
Post-cure (optimal) 25°C 5–7 days
Accelerated cure 60°C + 25°C 3 h + 2–3 days

Table 3 – Physical Properties (Cured)

Property Test / Condition Value Unit
Color Visual, 25°C Clear, light amber
Solvent resistance Excellent
Hydrolytic stability MIL-I-46058C, 120 d @ 85°C / 95% RH No discoloration/degradation
Flexibility MIL-I-46058C, 1/8” mandrel No cracking/crazing
Thermal shock MIL-STD-810B, -65 to +125 °C No cracking/deformation
Fungus resistance ASTM G-21 Non-nutrient
Solderability Excellent

Table 4 – Electrical Properties (Cured)

Property Test / Condition Value Unit
Insulation resistance MIL-I-46058C, 25°C, 2 mils 2.5 × 10¹³ Ω
Insulation resistance (humid) After 10 d @ 65°C, 95% RH 1.3 × 10¹⁰ Ω
Dielectric strength ASTM D149, 25°C 3500 V/mil
Dielectric withstand voltage MIL-I-46058C 1500 VAC No breakdown
Dielectric constant ASTM D150, 1 MHz, 25°C 2.7
Dissipation factor ASTM D150, 1 MHz, 25°C 0.02
Volume resistivity ASTM D257, 25°C 1.5 × 10¹⁵ Ω·cm

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