DOWSIL™ 1-2577 Conformal Coating

Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others

DOWSIL™ 1-2577 Conformal Coating

Main features

  • One-part silicone conformal coating
  • UV indicator for inspection and quality control
  • High dielectric strength and electrical insulation

Product Description

DOWSIL™ 1-2577 Conformal Coating is a one-part, translucent silicone conformal coating designed to provide durable mechanical and environmental protection for electronic components and printed circuit board assemblies. This solvent-borne resin cures at room temperature through atmospheric moisture, forming a tough, elastoplastic, and abrasion-resistant surface that enhances long-term reliability in demanding environments. A built-in UV indicator allows for easy inspection and automated quality control during production.

DOWSIL 1-2577 features a medium viscosity formulation and can be applied by spray, brush, dip, flow, or automated selective coating systems. The coating enables flexible processing with optional mild heat acceleration to support faster in-line manufacturing. It delivers excellent adhesion to a wide range of PCB substrates, including low-residue and lead-free solder systems, and meets key industry standards including IPC-CC-830, UL746E, and MIL-I-46058C with a UL94 V-0 flammability rating.

Product Key Features

  • One-part silicone conformal coating
  • Room temperature moisture cure (no oven required)
  • Optional heat acceleration for faster processing
  • UV indicator for inspection and quality control
  • Tough, abrasion-resistant elastoplastic coating
  • Excellent adhesion to PCBs and solder systems
  • Wide operating temperature range (-45°C to 200°C)
  • High dielectric strength and electrical insulation
  • UL94 V-0, IPC-CC-830, UL746E, MIL-I-46058C compliant
  • Compatible with spray, dip, brush, and automated coating methods

Applications

  • Conformal coating for printed circuit board (PCB) assemblies
  • Protection for rigid and flexible circuit boards
  • Automotive electronics (control units, sensors)
  • Industrial control and automation systems
  • Consumer electronics and appliances
  • Applications requiring abrasion-resistant protective coatings
Product Family

DOWSIL 1-2577

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Color
The color
Translucent
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.04
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
950 mPa.s
Electrical Properties
Dielectric Strength
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material. Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property. As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
16 kV/mm
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
5e+13 Ohms⋅cm
Thermal Properties
UL 94 Rating
Flammability rating classification. It determines how fast a material burns or extinguishes once it is ignited. HB: slow burning on a horizontal specimen; burning rate less than 76 mm/min for thickness less than 3 mm or burning stops before 100 mm V-2: burning stops within 30 seconds on a vertical specimen; drips of flaming particles are allowed. V-1: burning stops within 30 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed. V-0: burning stops within 10 seconds on a vertical specimen; drips of particles allowed as long as they are not inflamed. 5VB: burning stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may develop a hole. 5VA: burning stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may not develop a hole
V-0

Additional Information

Learn More About DOWSIL™ 1-2577


DOWSIL™ 1-2577 Conformal Coating is a reliable solution for protecting electronic assemblies against mechanical stress and environmental exposure. This silicone conformal coating delivers strong adhesion, abrasion resistance, and excellent electrical insulation, making it suitable for automotive, industrial, and consumer electronics applications.


Main Advantages of DOWSIL 1-2577

abrasion resistance

Forms a tough, elastoplastic surface that resists abrasion, scratches, and mechanical wear, ensuring long-term protection of sensitive components.

room temperature cure

Cures at ambient conditions without ovens, simplifying processing and reducing energy consumption while allowing optional heat acceleration.

uv inspection capability

Integrated UV tracer enables fast and reliable inspection, improving quality control in automated production environments.

broad compatibility

Excellent adhesion to a wide range of substrates, including modern no-clean and lead-free solder systems used in electronics manufacturing.

How to Choose a Conformal Coating

  • ✔ Environmental exposure
  • ✔ Mechanical protection needs
  • ✔ Cure mechanism
  • ✔ Repairability
  • ✔ Application method
  • ✔ Compliance requirements

Compliance You Can Trust ✅

  • IPC-CC-830 Approved
  • UL746E Recognized
  • MIL-I-46058C Approved
  • UL94 V-0 Flammability Rating

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