WLC (waste light concrete) is based on a Hungarian patent that allows us to replace up to 100% of naturally mined aggregates (sand and gravel) in the concrete mix with shredded, mixed, solid waste and recycle large amounts of otherwise non-recyclable ingredients. The result is a heat-, shock-, and fire resistent material that is lighter than normal concrete and has more flexibility. Best for road and pavement base layers and insulating walls or blocks. WLC concrete is 100% recyclable in an endless loop.