LOCTITE STYCAST CC 8555

Main features

UV curable
Excellent chemical resistance
Good wettability and void free

Product Description

LOCTITE® STYCAST CC 8555 is a solvent free conformal coating designed to provide rugged protection from moisture and harsh chemicals. It is compatible with industry standard solder masks, no-clean fluxes, metallization, components and substrate materials.

LOCTITE® STYCAST CC 8555 conformal coating is specifically formulated to rapidly gel and immobilize when exposed to UV light and then fully cure when exposed to atmospheric moisture, ensuring optimum performance even in shadowed areas.

LOCTITE® STYCAST CC 8555 is a high-performance conformal coating that protects electronics in harsh industrial environments. The material’s ability to safeguard printed circuit boards (PCBs) and components within challenging conditions is verified by its UL 746E RTI rating at 130°C, UL 94 V-0 flammability rating, and resistance to corrosive gases. The one-component, dual-cure (UV and moisture) conformal coating is solvent-free, has good wetting and flow characteristics, and provides excellent electrical performance.This product conforms to IPC-CC-830 requirements.

Recommended UVA Dual cure conditions:

Medium pressure mercury vapor lamp:

Wavelength, nm 365
Exposure time, seconds 30
Light intensity, mW/cm² 300 to 600

Moisture cure for shadowed areas

Relative humidity 50%, @ 25°C, hours 72

Product Family
CC8555

1. Select Package Type

4 liter Pail

Catalog Product

Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.

Shortest leadtime

Shipping in 8 - 12 weeks

Contact for Pricing

Packaging

TDS, SDS & Technical documents

Specifications
Additional Information

Technical Specifications

General Properties

Shelf Life Shelf Life Shelf life is the amount of time after manufacturing that a product is guaranteed to retain its properties. It differs vastly per product and it is based on temperature and storage conditions. The properties can be guaranteed for the temperature and time range indicated on the TDS since those are the ones tested to be the best for the product.
Shelf Life @ 25°C	365 days

Specific Gravity

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.

1.05

Physical Properties

Viscosity

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

60 mPa.s

Electrical Properties

Dielectric Constant

Dielectric Constant
Dielectric Constant (k), commonly known as relative permittivity, is a number relating the ability of a material to carry alternating current to the ability of vacuum to carry alternating current.

It determines the ability of an insulator to store electrical energy and is the ratio of electric permeability in vacuum against the electric permeability of a material.

The lower the dielectric constant (κ) and dissipation factor, the less energy is absorbed from an electric field, making it a much better insulator.

It is a dimensionless property that can be affected by various factors such as the thickness uniformity of a material, insufficient contact between the sample and electrodes, water adsorption and contact resistance.

Dielectric Constant @ 1000 kHz

2.51

Dielectric Strength

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.

27.5 kV/mm

Surface Resistivity

12700000000000000 Ohms/sq

Volume Resistivity

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.

1.5x10¹⁶ Ohms⋅cm

Dissipation Factor

Dissipation Factor
Dissipation factor is commonly known as loss tangent or tan delta.  

It is a ratio of the loss index and the relative permittivity and it measures the inefficiency of an insulating material to maintain energy (that otherwise dissipates in the form of heat). The lower the factor, the better the insulation.

It is the reciprocal of the quality factor and always refers to a specific temperature and frequency.

Dissipation Factor @ 25°C /1000 kHz

0.057

Mechanical Properties

Hardness Hardness Hardness is a dimensionless quantity. There is no direct relationship between measurements in one scale and their equivalent in another scale or another hardness test.
Durometer (Shore A)	77

Elongation

Elongation
Elongation is the process of lengthening something.

It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks.

It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.

31 %

Tensile Strength

Tensile Strength
The tensile strength of a material is the maximum amount of tensile stress that it can withstand while being stretched or pulled before failure.

Some materials break very sharply, without plastic deformation, in what is called a brittle failure. Others, which are more ductile, including most metals, experience some plastic deformation and possibly necking before fracture.

Tensile Strength

Tensile Strength
Tensile strength determines the resistance of a material to break under tension and it measures how much elongating load (or tensile stress) it can handle before fracture.

To make it simple, it measures how much force we have to apply when pulling apart a material before it breaks.

10.4 MPa

Thermal Properties

Operating Temperature

-40 to 130 °C

Additional Information

RELIABILITY

UL 746E relative temperature index (RTI) rating of 130°C
Conforms to IPC-CC-830 requirements
High corrosive gas resistance
Protects against dust, moisture, harsh liquids, and vapors

SAFETY AND SUSTAINABILITY

UL 94 VO flammability rating protects users against catastrophic failure
VOC/Solvent free formula prioritizes human and environmental health
RoHS-compliant
UV + moisture dual-curing mechanism reduces required energy use versus heat-cured conformal coatings
Lower carbon footprint compared to solvent-borne materials
No organometallic catalyst

PROCESSING AND PERFORMANCE

UV curable
Good wetting and leveling for thorough, uniform coverage
Excellent dielectric strength @ 27.5 kilovolts per millimeter (kV/mm)
Good surface insulation resistance (SIR)

COST-EFFICIENCY

Requires 1⁄3 to 1⁄2 less material than solvent-based materials to achieve target thickness
Wide process window and fast throughput for high-volume production