LIMESTRONG BUILD is a millennias-old formulation of water + lime + pumice pozzolan—a pozzolanic hydraulic lime (PHL) plaster that not only out-performs modern plaster equivalents, it stands as an environmentally sound alternative to brittle synthetic stucco and other Portland cement-based products. For wall materials and substrates that need to breathe, a lime plaster rendering is the only smart choice. As for the impressive performance characteristics—autogenous healing, flexibility, breathability, strength, durability—the convincing proof is found in centuries of lime-plaster use and on-wall performance.