What type of drywall is labeled as Type X?

Type X drywall is specifically designed to provide enhanced fire resistance. This fire-rated drywall contains special core additives, typically gypsum, that help slow the spread of fire and increase the period during which the drywall can withstand high temperatures. It is commonly used in building applications where fire safety is a concern, such as in corridors, and stairwells, or in walls that separate dwelling units in multi-family housing.

The other options represent different types of drywall, each with specific characteristics, but do not align with the designations for Type X. Water-resistant drywall, for instance, is intended for areas prone to moisture and humidity, while soundproof drywall is geared towards noise reduction in various applications. Moisture-resistant drywall is formulated to withstand higher humidity environments but lacks the additional fire resistance that Type X offers.