Firestop putties should be available in which forms?

Firestop putties are designed for sealing penetrations and joints in fire-resistive assemblies to prevent the spread of fire, smoke, and gases. The correct answer highlights that firestop putties come in various convenient forms, including bulk, bars, or sticks. This versatility allows for different applications and ease of use, depending on the specific needs of the firestop installation.

Firestop putties often need to be manipulated to fit around different shapes and sizes of penetrations, and being available in bulk, bars, or sticks provides technicians with the flexibility to measure out the quantity they need or shape it as required for the application. This adaptability is crucial in ensuring a proper seal in varied circumstances.

The other forms listed in the incorrect options are more limited and do not encompass the full range of forms that firestop putties can take. Firestop putties are not typically available only in liquid form, nor are they strictly confined to pre-formed circular shapes or pre-packaged foam containers. Such limitations would reduce the effectiveness and usability of the firestop solutions in diverse installation scenarios.