GRAVELOCK soil stabilizer is a world leader in cost effective, innovative, anionic, soil stabilization and dust control for roads, landing strips, parking areas, etc.A Unique Company Supplying a Unique Product.In 1978, Mr J J Grabe, together with prominent scientists and geologists, developed a liquid soil stabilizer to help solve the problems associated with clay and water in soils. This product was called CON-AID, subsequently also known as CBR PLUS. After numerous trials and further research, the product was commercially manufactured in 1980. The success of the use of CON-AID in South Africa lead to CON-AID International (Pty) Ltd entering and developing an international market with a network of accredited Agents, Distributors and Associates now covering the globe.Today, CBR PLUS has established itself in more than 100 countries and has assisted in the successful construction of over 32,000 kilometers of roads.CBR PLUS North America Inc. was established in 1993 in association with the Robertson Group of Vancouver, Canada.