What term indicates the duration available to manipulate urethane before curing begins during assembly?

• A. Pot life
• B. Working time
• C. Open time
• D. Processing time

Answer: (B)

The duration you can manipulate urethane before it begins to cure is called working time. This window starts right after the urethane is mixed and ends as the material thickens and starts curing, so you need to spread, position, and adjust the bond within that period. Temperature and formulation affect it—higher temperatures speed up the chemical reaction and shorten working time, while cooler conditions lengthen it—so plan your assembly steps to fit within this timeframe. Open time refers to how long the adhesive remains tacky after application and before bonding surfaces are joined, pot life is the period the mixed material stays usable in the container, and processing time is not the standard term used here. Therefore, working time best describes the time available to manipulate urethane during assembly.