Applications

HumiSeal® 1A27 – Urethane Conformal Coating

  • Item Name: HumiSeal® 1A27
  • Manufacturer: HumiSeal
  • Technology: Single-component polyurethane conformal coating (no free isocyanates)
  • Color: Fluoresces under UV light for inspection
  • Cure Type:
    • 30 days at room temperature
    • 30 hours at 76°C
    • 20 hours at 88°C
  • Package Size: Contact Avantek for details
  • Shelf Life: 24 months

1. Product Overview

HumiSeal® 1A27 is a single-component polyurethane conformal coating designed for printed circuit boards. It is free of isocyanates, RoHS compliant, and UL recognized (File No. E105698).

2. Applications

  • Protection of electronic assemblies and PCBs
  • Applied via dipping, spraying, or brushing

3. Typical Properties

Property Value
Density (ASTM D1475) 0.96 ± 0.02 g/cm³
Solids Content 50 ± 3%
Viscosity 3000 ± 1000 cP
VOC 480 g/L
Recommended Coating Thickness 25 – 75 µm
Drying Time to Handle 30 min
Full Cure Options 30 days @ RT, 30 hrs @ 76°C, 20 hrs @ 88°C
Thermal Shock Resistance -65°C to 125°C
CTE (TMA) 170 ppm/°C
Glass Transition Temperature (Tg) 28°C
Modulus (DMA) 18.1 MPa
Flammability (UL 94) V-0
Dielectric Withstand Voltage >1500 V
Dielectric Breakdown Voltage 7500 V
Dielectric Constant (1MHz, 25°C) 3.6
Dissipation Factor (1MHz, 25°C) 0.02
Insulation Resistance 2.0 x 10¹⁴ Ω (200TΩ)
Moisture Insulation Resistance 1.2 x 10¹⁰ Ω (12GΩ)

4. Application Methods

  • Dipping: Use HumiSeal® Thinner 521 to adjust viscosity, control immersion/withdrawal rate (5-15 cm/min).
  • Spraying: Mix with HumiSeal® Thinner 521 (1:1 ratio). Ensure adequate ventilation.
  • Brushing: Small addition of HumiSeal® Thinner 521 recommended for even coating.

Everwide FX244-1: High Performance for Precision Molding

FX244-1 A specialized two-part silicone rubber designed for creating high-precision molds. This material features a unique oil-bleeding property that creates a self-releasing surface, eliminating the need for external non-stick sprays during demolding.

Henkel Loctite SI 5910: Flexible Silicone Gasket Sealant || Avantek Viet Nam – Your Reliable Supply Partner

Partial Gasket & Seal Strategies Using Henkel Loctite SI 5910

Gasket sealing is a core part of many industrial assembly and maintenance operations — from automotive engine housings to HVAC covers and machinery flanges. When selecting a gasketing solution, you need something that forms reliably in place, resists movement and fluids, and simplifies application — which is where Henkel Loctite SI 5910 fits perfectly

RELATED PRODUCT

Contact Technical Support

Leave your information or contact via Hotline, our Customer Support Technical team will contact you immediately! 

(+84) 944 415 762

(+84) 889 901 929

Our operators are ready to assist from 8:30 AM to 5:30 PM (GMT+7).
For requests outside of the above hours, please submit the request form.