Concrete
Rinker Materials Corporation
[ http://www.rinkermaterials.com/ ]
Manufactures and distributes a range of heavy building materials such as crushed stone, cement, concrete block and asphalt. Includes product and measurement conversion calculator. Based in West Palm Beach, Florida, USA.
Ozinga
[ http://www.ozinga.com ]
Produces ready mix, colored and decorative concrete. Also offers calculator, online store and product guides. Based in Mokena, Illinois, USA.
Quikrete
[ http://www.quikrete.com/ ]
Manufactures concrete coatings. Also offers FAQ's, news releases, quantity calculator and glossary. Based in the USA.
Concrete Revolution
[ http://www.concreterevolution.com ]
Designing, crafting and installing concrete countertops, sinks and fireplaces. Also includes FAQ's. Based in Denver, Colorado, USA.
Concrete Chemicals
[ http://www.liquiblack.com/ ]
Manufactures concrete colorants and additives. Includes distributor locations. Based in San Carlos, California, USA.