NuSil™ R-2145 is a extremely tough, high durometer, fast-cure adhesive/sealant.

Product Type: Encapsulant

Compatible Substrates & Surfaces: Metal, Polyurethane

Chemical Family: Silicones

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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Product Type
CAS No.
68909-20-6

Features & Benefits

Product Highlights
  • Two-part, gray silicone adhesive system
  • Cures at room temperature or rapidly by applying heat in an oven or by a heat gun or lamp
  • Does not require atmospheric moisture to cure
  • No curing byproducts such as acetic acid or methyl alcohol
  • Product available in easy-to-use, airless side-by-side kits that eliminate mixing and deairing difficulties
  • 1:1 Mix Ratio (Part A: Part B)

Applications & Uses

Compatible Substrates & Surfaces
Applications
  • Adhesive for bonding and sealing silicones to each other and other substrates such as metals and plastics
  • For rapid production or prototyping due to a rapid cure
Instructions for Use

Mixing

Mix at a 1:1 mix ratio when extracted from their side-by-side kits through a static mix and dispense cartridge. Attach the disposable static mix tip to the cartridge and extrude the product directly onto the substrate. Note: NuSil Technology recommends discarding the first few grams of extruded material. Can also be purchased in standard two-part kits. When using standard kits, take care to minimize air entrapped while mixing. Place the mixed product in a vacuum chamber to remove entrapped air and subsequently reduce bubble formation during curing.

Substrate Considerations

Cures in contact with most materials common to electrical and electronic assemblies. Exceptions include: sulfur cured organic rubbers, latex, chlorinated rubbers, some RTV silicones and unreacted residues of some curing agents. Clean units being encapsulated or potted to ensure they are free of contaminants. Also clean and dry containers and dispensers being used. Prevent cure inhibition by washing all containers with clean solvent or volatizing the contaminants by heating.

Note: Some bonding applications may require use of a primer. NuSil Technology CF1-135 silicone primer is recommended.

Adjustable Cure Schedule

Product cures at a wide range of cure times and temperatures to accommodate different production needs

Properties

Appearance
Dark Gray
Typical Properties
ValueUnitsTest Method / Conditions
Extrusion Rat e180.0g/minute
Lap Shear145 (1 )psi (MPa)
Durometer Type A45.0
Dielectric Strength825 (32.18 )volts/mil (kV/mm)
Elongat ion400.0%
Mix Rat io0.042361111
Specific Gravity1.17
Stress at Strain 200 %525 (3.62)psi (MPa)
Tear150 (26.46 )ppi (kN/m)
Tensile1,050 (7.24 )psi (MPa)
Work Time15.0minutes
Cured Properties
ValueUnitsTest Method / Conditions
Cure SystemPlatinum
Cure at 65 °C2.0hours

Packaging & Availability

Regional Availability
  • Asia Pacific
  • Europe
  • Latin America
  • North America