Termoplaster

Termoplaster, or thermoplastic plaster, is a plaster-based composite that incorporates thermoplastic polymer binders to improve workability and performance. It is typically based on gypsum plaster or cementitious binders blended with thermoplastic emulsions. The resulting material remains workable when warmed and hardens upon cooling, allowing shaping, smoothing, or patching with reduced cracking and improved adhesion to masonry substrates.

Properties and use: The polymer-modified plaster offers greater flexibility, improved adhesion, and better impact resistance than traditional plaster. It often has a longer open time and can be reworked with heat or mechanical means. It is used for interior wall finishes, decorative plasterwork, mold-making, and restoration where some degree of elasticity and easier repair are beneficial. It can be applied as coats or patches and is compatible with standard primer and paint systems.

Manufacture and application: Termoplaster is produced by mixing plaster with a polymer binder during or after the mixing process. Additives such as plasticizers, fillers, and bonding agents may be included to tailor viscosity, curing, and substrate compatibility. Application methods are similar to conventional plastering, with attention to substrate preparation and moisture conditions.

Advantages and limitations: Benefits include easier application, reduced shrinkage cracking, good substrate bonding, and reworkability. Limitations include higher cost, potential sensitivity to high heat or solvents, and the need for substrate and finish compatibility checks, particularly on historic surfaces.

Safety and standards: Handling follows standard plaster safety practices, including dust control and respiratory protection during dry work. Material specifications are typically defined by manufacturers and regional building codes, rather than by a single global standard for termoplaster.