As sealing technology developed, so did the company's portfolio of products and its production capabilities. During the 1960's, WCL began to manufacture Compression Rubber Mouldings to complement the Gasket facilities in Penistone - a project that, several years later, resulted in a purpose-built extension being devoted solely to the production of moulded rubber components.

Throughout the same period, the gasket cutting side of the business was not neglected, as new machinery helped to achieve more cost-effective production capabilities. When new materials were developed, such as a wide range of products to replace the more versatile asbestos, WCL led the way with their introduction to all of its customers.