SIC for "waterproofing"
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1799 - Special Trade Contractors, Not Elsewhere Classified
Special trade contractors primarily engaged in construction work, not elsewhere classified, such as construction of swimming pools and fences, erection and installation of ornamental metal work, house moving, shoring work, waterproofing, dampproofing, fireproofing, sandblasting, and steam cleaning of building exteriors. …Examples: Antenna installation, except household type - contractors, Artificial turf installation - contractors, Awning -
2899 - Chemicals and Chemical Preparations, Not Elsewhere Classified
Establishments primarily engaged in manufacturing miscellaneous chemical preparations, not elsewhere classified, such as fatty acids, essential oils, gelatin (except vegetable), sizes, bluing, laundry sours, writing and stamp pad ink, industrial compounds, such as boiler and heat insulating compounds, metal, oil, and water-treating compounds, waterproofing compounds, and chemical supplies for …Examples: Acid resist for etching, Acid, battery, Anise oil, Antifreeze compounds, except industrial alcohol, Bay oil, Binders