sprayapplied

Sprayapplied, or spray-applied, refers to materials that are delivered to a surface by spraying a liquid, slurry, or foaming mixture from a spray device and then cure or dry to form a continuous coating, insulation, or protective layer. It covers a range of products used in construction, industrial, and architectural settings, including cementitious, polymeric, and composite systems.

Common spray-applied materials include cementitious spray fireproofing (SFRM), spray-applied polyurethane foam (SPF) for insulation, spray-applied polyurethane or polyurea coatings for corrosion protection and waterproofing, elastomeric coatings, and intumescent coatings used for fire safety. These products are selected based on performance needs such as fire resistance, thermal insulation, waterproofing, or protective barriers.

Application involves surface preparation, equipment selection (airless or plural-component spray systems), and controlled spraying technique to achieve specified thickness. Materials cure or dry after application, sometimes requiring environmental control and post-application inspection to verify coverage and thickness.

Advantages of spray-applied systems include rapid coverage on complex geometries, seamless coatings that reduce joints, and the ability to provide multiple functions—such as insulation, fire protection, and waterproofing—in a single layer. Limitations include the need for trained personnel, potential health hazards from aerosols and isocyanates, volatile organic compound content, curing time, and sensitivity to substrate condition and environmental factors.

In building and industrial projects, spray-applied systems are assessed for performance against applicable codes and standards for fire resistance, thermal performance, and durability. Quality control practices typically involve thickness measurements, adhesion testing, and cure monitoring to ensure compliance with specifications.