How does Plaster-Weld® work? Plaster-Weld® is applied as a liquid and as it dries to a thin, flexible film, it forms a tenacious bond to the structural surface. The dry film is reactivated by the moisture and chemical reaction that occurs as the new plaster dries.

What does Plaster Weld do?

Plaster-Weld® prepares the surface to allow you to plaster directly to concrete over electric radiant heat cable, and to bond cement mortar beds to smooth concrete for installation of rigid foam insulation.

What is the best bonding agent for Plaster?

Probably the best-known bonding agent to plasterers is Plaster-Weld, made by the Larsen Products Corpo- ration, Rockville, Md. This bonding agent can be applied in a manner similar to paint: in a thin film using a brush, a roller or a spray gun.