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1 of 9 products in this brand
POLYCAT® SA 2 LE is a low-emissive, delayed-action tertiary amine based on DBU. It effectively enhances the urethane reaction when heat is applied, making it suitable for microcellular, integral skin, coating, adhesive, sealant, and elastomer applications. This product is especially recommended for use with low-activity aliphatic isocyanates.

Functions: Catalyst

Chemical Family: Amines, Tertiary Amines

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Chemical Family
CASE Ingredients Functions
Composite Materials Functions
Industrial Additives Functions
Plastics & Elastomers Functions

Features & Benefits

CASE Ingredients Features
Key Performance Benefits
  • Low emission catalyst
  • Long pot life and fast back-end cure
  • Broad use of level range to meet desired reactivity requirements

Applications & Uses

Compatible Polymers & Resins
Industrial Additives End Use
Product Applications

POLYCAT® SA 2 LE is recommended for low emissions flexible, rigid and castable polyurethane formulations for coatings, adhesives, composites, and elastomers. POLYCAT® SA 2 LE exhibits formulation latitude allowing for a broad use level range to achieve desired processing and reactivity requirements.


Physical Form
Light yellow liquid
Soluble in
Typical Properties
ValueUnitsTest Method / Conditions
Viscosity (at 25°C)2600.0mPa.s-
Density (at 25°C)1.13g/cm³-
Calculated OH number168.0mg KOH/g-
Flash Pointmin. 93°CPMCC
Product Properties

POLYCAT® SA 2 LE - Product Properties

POLYCAT® SA catalysts can be activated at different temperatures. By choosing the right catalyst you can tailor a delayed reaction and achieve both long pot-life and fast post-curing

Technical Details & Test Data

Viscosity Profiles in a Standard Aromatic Elastomer Formulation

Traditional polyurethane catalysts accelerate a polyol-isocyanate reaction at ambient conditions. However, when a delayed reaction profile is preferred, we offer the POLYCAT® SA series. These catalysts are activated by the natural exotherm generated during the formation of polyurethane or by using an external heat source, speeding up the cure time. POLYCAT® SA catalysts cure at different temperatures (as shown in the illustration below). By choosing the right catalyst you can tailor a delayed reaction profile to optimize your process and formulation.

The graphic below depicts the delayed action performance at ambient conditions of POLYCAT® SA 1/10, POLYCAT® SA 2 LE, POLYCAT® SA 4 and POLYCAT® SA 8. POLYCAT® SA 1/10 and POLYCAT® SA 2 LE have a more subtle delay. Due to its unique composition, POLYCAT® SA 2 LE can also be utilized to help reduce amine emissions. POLYCAT® SA 8 provides the longest delay as this catalyst activates at the highest de-blocking temperature. Additionally, the POLYCAT® SA series catalysts can be combined with other catalysts in our portfolio to optimize material properties and cure profile behavior.
POLYCAT® SA 2 LE - Viscosity Profiles in A Standard Aromatic Elastomer Formulation

Storage & Handling

Storage Conditions
  • Storage conditions: dry and cool place in factory-packed containers.
  • Optimum storage temperature: 10 to 30 °C.