Ideal Industries Duct Seal

Seals Gaps or Holes Around Electrical Boxes, Flashing and More

We Guarantee to Have the Best Price

What's special about this sealant?

  • Seals openings and holes around electrical boxes, flashing, or cable entrances/exits in walls to prevent electrical hazards
  • Soft and pliable, so it can be manipulated to fit odd-shaped gaps
  • Non-corrosive; will not adversely affect plastic, PVC, or metals
  • High flash point of 590° F (310° C) to protect from accidental electrical fires
  • Click for More Features
UL ClassifiedMade in USA

With Duct Seal by Ideal Industries, you can close oddly shaped holes or gaps with ease. Soft, pliable, non-toxic and paintable, this sealant is great for refrigeration, heating and cooling, plumbing and more, and will not corrode metal or plastic.


ID-31-601 Duct Seal Block 1 lbs Gray
ID-31-605 Duct Seal Block 5 lbs Gray
  • Since this sealant is soft and flexible, it can be reused time and again which will helps protect the environment
  • Non-toxic compound will not harm installers even without gloves
  • Can be painted immediately after application to blend in with decor
  • Can also be used in other applications such as:
    • Refrigeration
    • Heating and Cooling
    • Plumbing
  • UL Classified
  • Made in the USA USA
PART # ID-31-601 ID-31-605
Paintable YES YES
Non Toxic YES YES
Material Calcium Carbonate
Magnesium Aluminum Silicate
Crystal Quartz Silica
Butene Polymer
Synthetic Polymer
Carbon Black
Cellulose Fiber
Aluminum Silicate
Tall Oil Rosin
Naphthenic Wax
Chemical Resistance Resistant to water, alcohols, mild acids and bases
Chemical Description Butyl rubber composite






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Q:is this product waterproof

ID-31-601 is this product waterproof when used to seal ducts in manholes

Asked by Anonymous user on


  • - Thank you for your question. While it is listed as water resistant, water proofing would depend on the quality of the installation which is not something we can claim.

    Fernando M. on

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