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Leecast 38-191

LEECAST 38-191 is a proprietary two-part epoxy adhesive and encapsulating compound. It has been used extensively for potting lead wires in UL-listed commercial gasoline pumps. LEECAST 38-191 has exceptional chemical resistance, especially in respect to gasoline, various gasoline alcohol additives, and other aggressive organic solvents. It also features fast room temperature cure and excellent adhesion to a variety of wire coatings and other substrates. It is formulated with enough thixotropy to inhibit sag on vertical surfaces and self-leveling when applied in a bead on horizontal surfaces.

Brand: Leecast (8 products)

Product Type: 2K (2 component) Adhesive, Epoxy Adhesive

Chemical Family: Epoxy & Epoxy Derivatives

Enhanced TDS

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Chemical Family

Epoxy & Epoxy Derivatives

Product Type

2K (2 component) Adhesive,

Epoxy Adhesive

CAS No.
25068-38-6
Technologies

Ready-to-Use Products

Product Families

Ready-to-Use Products — Adhesives & Sealants

Other Adhesives & Sealants

Features & Benefits

Ready-to-Use Product Features

Chemical Resistant,

Excellent Substrate Adhesion,

Good Adhesion,

Good Leveling Properties,

Good Sagging Resistance

Applications & Uses

Markets

Electrical & Electronics

Applications

Electrical & Electronics — Packaging & Assembly

Potting Compounds

Electrical & Electronics — Wire & Cable

Other Wire & Cable Applications

Properties

Appearance
Black liquid, Light gray liquid
Typical Properties
ValueUnitsTest Method / Conditions
Thixotropy (25ºC) (PART A)121000--
Viscosity (25ºC) (Part A)50900cps-
Density (Part A)10.8lbs./gal-
Specific Gravity (Part A)1.3g/ml-
Thixotropy (25ºC) (PART B)146000--
Viscosity (25ºC) (Part B)45500cps-
Density (Part B)12.5lbs./gal-
Specific Gravity (Part B)1.5g/ml-
Handling Properties
ValueUnitsTest Method / Conditions
Hardness Part A (25ºC)85Shore D-
Hardness Part B (25ºC)85Shore D-
Mix Ratio, by volume (Part A)100--
Mix Ratio, by weight (Part A)100--
Gel Time (25ºC) (100 g) (PART A)32minutes-
Green Strength (Part A)15hours-
Full Strength (Part A)7days-
Mix Ratio, by volume (Part B)20--
Mix Ratio, by weight (Part B)23--
Gel Time (25ºC) (100 g) (PART B)32minutes-
Green Strength (Part B)15hours-
Full Strength (Part B)7days-

Regulatory & Compliance

Certifications & Compliance

ISO 9001

Technical Details & Test Data

Chemical Resistance
  Fuel C/methanol Fuel C/ethanol Fuel C only
Weight Gain, % 0.0066 0.0007 0.0004
Hardness Change, % Nil Nil Nil
Compressive Strength Increase, % 1.01 0.09 0.11

                   1 Fume resistance, 8 days @ 25oC

UL Crush Test

METHOD
Cylindrical specimens of LEECAST 38-191 were exposed to saturated vapors for a period of 168 hours. Following these exposures, the samples were placed between two parallel plates and crushed with a compression-testing machine having a crosshead speed of 0.1 in/min. The load was applied perpendicular to the axis of the cylindrical samples and the compressive force required to crack and break the specimens was recorded.
RESULTS
 

Sample Conditioning Sample Crush Force (lb.) Percent of As Received
As received 3897 100
Fuel C 3633 93
Fuel A 3443 88
IRM 903 Oil 3410 88
85% Fuel C/ 15% Methanol 3510 90
85% Fuel C/ 15% Ethanol 3613 93

The resistance to crushing following sample conditioning was higher than 85 percent of the As Received value.

Storage & Handling

Shelf life

6 months