DLSN is designed for sealing metals and masonry surfaces without the need or requirement of a primer. It effectively blocks the infiltration of gases, dust and other contaminants and the exfiltration of conditioned air.

DLSN is a gray, single-component material that is non-drying
and permanently flexible.

The DLSN in the 5 gallon & 52 gallon containers is a pumpable sealant and is ideal for use in automated injection systems.

• Single active component material
• Non-Drying
• Permanently flexible
• No need for a primer
• Non-corrosive
• Non-toxic
• Gray

• Adheres to oily metal surfaces,
painted and un-painted galvanized
steel or aluminum
• Conforms to ASTM D71-72
• 5 gallon & 52 gallon containers are
Duro-Gum is a convenient way to seal a joint, crack or any opening so that no moisture, dust particles or air can enter the crevice. It is a gray, permanently soft, nontoxic compound which will adhere to clean, dry surfaces including metal, plastic, wood and glass. It will not adversely affect other plastic materials or corrode metals. It also has no adverse effect to human skin.

• Meets UL 723
• FDA Approved
• U.S.D.A. Acceptable
• Dielectric Strength: Approx. 200 volts per mil (ASTM D149-64) or 10 KV
• Excellent resistance to water, alcohols, mild acids and bases.
• Non-toxic
• Will not corrode Metals.
• No irritation to eyes or skin
• Paintable
• Gray color
Ordering Information:

  • 5052 DLSN-C Duct Lock Sealant - Cartridge
  • 5065 DLSN-5 Duct Lock Sealant - 5 Gallon Pail
  • 5068 DLSN-52 Duct Lock Sealant - 52 Gallon Drum

  • 21048 BTLG1 Butyl Gum 1lb Paintable
UL Light Gray Thumbing Butyl Brick 
For more information on DLSN & Duro-Gum,
click the images below for the Literature Sheet & Submittal.