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Ten gray duct seal blocks in plastic bags

L.H. DOTTIE

L.H. DOTTIE Duct Seal 5 lb Gray 10 PK

SKU CH-EMQK-X3130

Gray duct seal compound supplied in ten five-pound bags for sealing electrical boxes and conduit openings

  • Product typeElectrical Replacement Parts
  • 5 lb duct seal compound per pack
  • Gray colour suits conduit and box sealing
  • 10 packs supplied for multi-site jobs
  • Plastic bag keeps compound clean and ready
  • DOTTIE brand trusted for electrical installations

Duct Seal 5 lb Gray Pack

This duct seal compound comes in a five-pound gray block packaged in a plastic bag. It is designed for sealing electrical boxes and conduit entries against moisture and drafts. The product suits electricians and maintenance crews who need a pliable, non-hardening sealing material for indoor or outdoor installations. Supplied in a ten-pack for job-site convenience.

Replaces Loose Putty and Tape

The compound replaces makeshift seals such as loose putty, electrical tape or silicone that can slump or cure brittle over time. It stays flexible across a wide temperature range so it maintains contact with irregular knock-out surfaces. The jump is worth it when a permanent, re-enterable seal is required for code-compliant box penetrations in wet or damp locations.

Limited to Hand-Applied Press Fit

The material relies on hand pressure to conform to conduit and cable profiles; it cannot be tooled like a caulk or injected into deep cavities. It offers no structural adhesion, so it must be mechanically retained by box clamps or conduit fittings. Extreme vibration or continuous immersion may eventually displace the seal.

How it compares

Measured against everything we stock in Electrical Enclosures & Cabinets, at today’s prices. Recalculated every night.

Price $243.99
Pricier than about 90% of the 1,411 comparable items (median $39.99).

Specifications

Product
Brand nameDOTTIE
Product typeElectrical Replacement Parts

Questions about this item

What size electrical boxes will the 10-pack of duct seal fit?

Each 5 lb bag provides enough pliable compound to seal standard knock-out openings and conduit entries in common residential and commercial boxes.

How do you install the duct seal, and what step do installers often skip?

Press the gray compound firmly around cables or pipe penetrations until it forms a continuous air-tight seal; the step often missed is fully seating the material into irregular gaps.

When will the duct seal need to be replaced or checked?

Inspect the seal after any vibration, temperature cycling, or conduit movement; replace the compound if it hardens, cracks, or pulls away from the opening.

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