National Seal Company is a manufacturing an installer of DURA SEAL® HD (high density polyethylene), COEX SEAL®, FRICTION SEAL®, DURA SEAL® LL (linear low density polyethylene) geomembrane liners; POLY-NET® drainage nets; TEX-NET® geocomposites; and Bentofix® Geosynthetic Clay Liners (GCLs).

• See also:
• Masterformat 2004
• 09 97 00 - Special Coatings
• 21 41 00 - Storage Tanks for Fire-Suppression Water
• 21 41 16 - Elevated Storage Tanks for Fire-Suppression Water
• 21 41 26 - Underground Storage Tanks for Fire-Suppression Water
• 22 12 00 - Facility Potable-Water Storage Tanks
• 22 12 16 - Facility Elevated, Potable-Water Storage Tanks
• 22 63 19 - Gas Storage Tanks for Laboratory and Healthcare Facilities
• 23 13 00 - Facility Fuel-Storage Tanks
• 23 13 13 - Facility Underground Fuel-Oil, Storage Tanks
• 31 31 00 - Soil Treatment
• 31 31 13 - Rodent Control
• 31 31 16 - Termite Control
• 31 31 19 - Vegetation Control
• 33 16 00 - Water Utility Storage Tanks
• 33 16 16 - Underground Water Utility Storage Tanks
• 33 16 19 - Elevated Water Utility Storage Tanks
• 33 47 00 - Ponds and Reservoirs
• 33 47 13 - Pond and Reservoir Liners
• 33 47 16 - Pond and Reservoir Covers
• 33 47 19 - Water Ponds and Reservoirs
• 33 47 23 - Sanitary Sewerage Lagoons
• 33 47 26 - Storm Drainage Ponds and Reservoirs
• 33 56 00 - Fuel-Storage Tanks
• 33 56 16 - Underground Fuel-Storage Tanks
• 33 56 43 - Aviation Fuel-Storage Tanks
• 33 56 53 - Compressed Gases Storage Tanks
• Masterformat 1995
• 02360 - Soil Treatment
• 02660 - Ponds and Reservoirs