LOCTITE CAT 43
Harmonization Code : 8529.90 | Parts solely or principally used for TV, radio, and transmission

Main features
- Liquid Polyamine Epoxy Catalyst
- Chemical-Resistant Cured Systems
- LOCTITE Encapsulant Compatibility
Product Description
LOCTITE® CAT 43 is a liquid amine-based epoxy catalyst designed for use with compatible epoxy resin systems. The catalyst provides effective curing performance, excellent adhesion development, and strong chemical resistance in demanding encapsulation, potting and industrial bonding applications. Its polyamine chemistry delivers robust cured-system properties while supporting a variety of electronic, electrical and industrial epoxy formulations.
Key Features & Benefits
- Polyamine-based epoxy catalyst technology.
- Liquid formulation for easy mixing and processing.
- Compatible with epoxy encapsulation and potting systems.
- Good adhesion development and cure efficiency.
- Suitable for industrial and electronic applications.
- Water-soluble and highly reactive amine chemistry.
- Designed for professional-use epoxy systems.
Recommended Applications
- Epoxy resin curing systems.
- Electronic encapsulation and potting compounds.
- Industrial bonding and assembly.
- Electrical insulation systems.
- General-purpose epoxy formulations.
TDS, SDS & Technical Documents
Technical Specifications
No specifications available.
Additional Information
Technical Properties
As-Supplied / Before-Processing Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Product Type | Epoxy Catalyst | — | Polyamine Curative |
| Appearance | Yellow Liquid | — | As supplied |
| Odor | Amine | — | Typical |
| Density | 0.99 | g/cm³ | 20°C |
| Initial Boiling Point | 318 | °C | Typical |
| Flash Point | >93.3 | °C | Closed Cup |
| pH | 10 - 11 | — | 10 g/L in water at 20°C |
| Water Solubility | Soluble | — | 20°C |
Technical Properties
After-Processing / Final-State Properties
| Property | Value | Unit | Condition / Method |
|---|---|---|---|
| Primary Component | 50 - 100 | % | Tetraethylenepentamine Fraction |
| Skin Corrosion Classification | Category 1B | — | H314 |
| Eye Damage Classification | Category 1 | — | H318 |
| Skin Sensitization | Category 1 | — | H317 |
| Reproductive Toxicity | Category 1B | — | H360D |
| STOT Repeated Exposure | Category 1 | — | H372 |
| Environmental Classification | Aquatic Chronic 2 | — | H411 |
| VOC Content | <3 | % | 2010/75/EC |





















