Repair Kit

Belzona Emergency Duct Work Repair Kit Large

Fast-response sealing for HVAC and ductwork in harsh environments.

See what’s inside
Belzona Emergency Duct Work Repair Kit Large — repair kit contents and lockable toolbox

The Belzona Emergency Duct Work Repair Kit is a fast-response solution for sealing and repairing damaged HVAC and duct systems, especially in harsh or outdoor environments. It includes Belzona 3121 MR7, a moisture-tolerant, flexible membrane, along with surface conditioners and reinforcement cloth for long-lasting, weatherproof repairs. Ideal for leaks, corrosion, and joint sealing, the kit allows for quick, cold-applied fixes without specialized equipment.

Best for

  • Sealing leaks and damage on HVAC and duct systems
  • Weatherproof repairs on outdoor or exposed ductwork
  • Joint sealing and corrosion repair on ducting
  • Quick cold-applied fixes without specialized equipment

What’s in the kit

12 items

Reference tools including IFU, PSS, and SDS documentation are available with technical support upon purchase.

Common questions

What's in the Belzona Emergency Duct Work Repair Kit Large?

The kit contains 12 items packed in one toolbox: Belzona 3121 MR7, Belzona 3921 SC Conditioner, Belzona 9111 Cleaner/Degreaser, Belzona 9331 MR7 Reinforcement Cloth, Belzona Applicator, Belzona Spatula, Belzona Mixing Bowl, Latex Gloves, Scissor, 1 Inch Chipping Brush, Lockable Water Proof Tool Box, Printed Instructions and Documents.

Does this repair require hot work or welding?

No. No heat or specialist tools needed — ideal for fast restoration of ductwork in the field.

How do I order this kit in Virginia, Maryland, Washington, D.C. or West Virginia?

Ordering is quote-based through Industrial Maintenance Solutions, the authorized Belzona distributor for Virginia, Maryland, Washington, D.C. and most of West Virginia. Call (540) 984-8162 or request a quote through the website form.

Moisture tolerant

Belzona 3121 MR7 is a flexible membrane that bonds even on damp surfaces for lasting weatherproof seals.

Large-format kit

Two units of MR7 plus full-length reinforcement cloth for extensive duct repair coverage.

Surface conditioner included

Belzona 3921 SC Conditioner ensures proper adhesion to duct substrates.

Cold-applied

No heat or specialist tools needed — ideal for fast restoration of ductwork in the field.

Industrial Maintenance Solutions

Get this kit — or help choosing the right one.

Tell us about the asset and we’ll get the right kit and materials to you, with technical support and 24-hour emergency response across Virginia, Maryland, Washington, D.C. and most of West Virginia.

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