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HumiSeal® 1A33 Gel – Thixotropic Polyurethane Paste – General Printed Circuit Board Applications

Item Name: HumiSeal® 1A33 Gel
Manufacturer: HumiSeal
Technologies: Single-component thixotropic polyurethane paste
Color: Not specified
Cure Type:

  • 30 days at room temperature
  • 30 hours at 76°C
  • 20 hours at 87°C
    Package Size: Contact to Techniq VN for details.
    Shelf Life: 24 months

1. Product Overview

HumiSeal® 1A33 Gel is a single-component thixotropic polyurethane paste designed for general printed circuit board (PCB) applications. It does not contain free isocyanates, fluoresces under UV light for easy inspection, and complies with RoHS 2011/65/EU Directive.

2. Applications

  • Protection of printed circuit boards (PCBs)
  • Suitable for use with cleaned substrates or low-residue, “no clean” assembly materials
  • Compatible with automated and manual syringe dispensing
  • Used in electronics manufacturing for insulation and environmental protection

3. Typical Properties (Before Mixing)

Property Value
Solids Content (Fed-Std-141, Meth. 4044) 44 ± 2 %
VOC 521 g/L
Dielectric Withstand Voltage (MIL-I-46058C) > 5000V
Dielectric Breakdown 42 KV/mm
Curing Time to Reach Optimum Properties 30 days @ RT, 30 hrs @ 76°C, 20 hrs @ 87°C
Shelf Life at Room Temperature 24 months
Recommended Stripper HumiSeal® Stripper 1063

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BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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