DOWSIL EA-2900

Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium

DOWSIL EA-2900

Main features

  • 10-Minute Assembly Strength
  • 400% Cured Elongation
  • 17.1 kV/mm Dielectric Strength

Product Description

DOWSIL EA-2900 Sealant White is a one-part, white, neutral alkoxy-cure RTV silicone adhesive for bonding and sealing PCB assembly components and optical parts in LED lamps and luminaires. Sufficient adhesion strength is reached after 10 minutes to continue assembly; aluminum lap shear at that point is 4 kPa. Typical tack-free time is 20 minutes at 23 deg C and 50% RH, and extrusion rate is 190 g/min. After 7 days at 23 deg C and 50% RH, the cured elastomer has 400% elongation at break and 2.1 MPa tensile strength. Unprimed lap-shear data are provided for aluminum, glass, polycarbonate, PMMA, and molded silicone.

Key features

  • Early assembly strength: Sufficient adhesion strength is reached after 10 minutes to continue assembly; aluminum lap shear at that point is 4 kPa.
  • Extrusion rate: Typical extrusion rate is 190 g/min.
  • Conditioned cured elongation: Elongation at break is 400% after 7 days at 23 deg C and 50% RH.

Applications

Bonding and sealing PCB assembly components and devices; assembling optical parts into LED lamps and luminaires.

Product Family

DOWSIL EA-2900

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Color
The color
White
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.
1.52
Physical Properties
Extrusion Rate
190 g/min
Tack-Free Time
20 minutes
Mechanical Properties
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.
400 %
Electrical Properties
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.
1.02 x 10¹⁴ Ohms⋅cm

Additional Information

Technical properties

Before-processing adhesive properties

PropertyValueUnitMethod / condition
Extrusion rate190g/minTypical
Specific gravity1.52g/mlTypical
Tack-free time20minTypical; 23 deg C and 50% RH
Shelf life12monthsAt 25 deg C
Technical properties

Cured adhesive properties

PropertyValueUnitMethod / condition
Durometer50Shore ATypical; after 7 days at 23 deg C and 50% RH
Modulus at 100% elongation1.2MPaTypical; after 7 days at 23 deg C and 50% RH
Tensile strength at break2.1MPaTypical; after 7 days at 23 deg C and 50% RH
Elongation at break400%Typical; after 7 days at 23 deg C and 50% RH
Dielectric strength17.1kV/mmTypical
Volume resistivity1.02 x 10^14ohm cmTypical

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