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Blog

November 2025 Newsletter Recap: Industrial & Mega Project Problems Solved with DM ‘35’ & ‘45’

Posted on November 5, 2025 by Ductmate Industries

When heavy-duty ductwork requires heavy-duty connections, the Ductmate ‘35’ and ‘45’ self-sealing rectangular flange duct connector systems provide a better solution to your industrial and mega project problems. Learn more below.

Industrial & Mega Project Problems Solved with DM ‘35’ & ‘45’ Systems

You can forget about struggling with traditional, labor-intensive methods for connecting heavy-duty ductwork. Backed by rigorous testing and our industry-leading guarantee, this superior solution not only saves you time, money, and effort but also ensures exceptional performance, making your operations more efficient and cost-effective.

The innovative DM ‘35’ and ‘45’ systems are designed for applications where strong, leak-free connections are critical.  Ideal for data centers, semiconductor plants, battery plants, wastewater treatment plants, chemical plants, oil rigs, stadiums and arenas, underground transit stations, and more.

The system features precision-engineered components for seamless assembly:

  • Roll-formed Flanges with Integral Mastic: Ensure a tight seal against the duct wall for a superior, leak-free connection. Integrated mastic eliminates the need for separate sealant applications, saving time and labor during assembly.
  • Corners: Reinforce the ductwork structure to hold everything together securely and provide a dedicated sealing surface for the gasket, further optimizing the system’s airtight integrity.
  • Gasket: Forms a vital barrier between the flanges to prevent air leaks and ensures optimal airflow within the duct system.
  • Cleats (Versa-Cleat or Bolt-On): Guarantee consistent compression and secure, efficient assembly, even on large duct spans.

With DM ‘35’ equal in strength to a SMACNA J-class and DM ‘45’ equal to a SMACNA K-class transverse joints, these systems provide the strength you need to connect the biggest duct imaginable without the labor-intensive fabrication processes of drilling bolt holes, welding frames, or applying rust-proof coatings. It’s no wonder that the DM ’35’ and ’45’ systems have become the clear choice over the labor-intensive companion angle.

Available in seven alloys (galvanized, galvanneal, aluminum (except cleat), aluminized, 304 stainless, 316 stainless, PVC-coated, and black iron), and with a variety of snap-on or bolt-on cleat, corner options, and more, the DM ‘35’ and ‘45’ systems are the ideal solution for your industrial and mega project problems.


RELATED PRODUCTS:

Time-Saving Tools

Did you know that we offer a variety of time-saving tools to make connections easier?  For ordering information or additional details on our time-saving tools listed below, visit our catalog or contact Customer Service.

Repeater4200 Fastener Gun

The Repeater4200 is the quickest flange fastener in the industry, and is ideal for DM ‘25’/’35’/’45’, Spiralmate & Ventmate, and ECONOflange connector systems. This lightweight (10.5lbs), safe, and easy-to-use pneumatic fastener tool features an anti-double fire mechanism and a shock-absorbing comfort rubber handle.  It packs a serious punch and is able to drive fasteners through various specialty metals with ease. Once you try it, you’ll wonder what you ever did without it.

Ductmate System Alignment Grip Tool

The Ductmate System Alignment Grip Tool is a modified vice grip designed to reduce on-site installation time for rectangular duct connections. Using the holes in the system’s corners, this tool quickly aligns and compresses mating ductwork, allowing for fast and easy installation.

Cleater Tools

The Cleater® 1 is the ideal tool for attaching metal or PVC cleat to flange joints when spacing is not an issue. For hard-to-reach places, use the Cleater 2 tool with a 5/8” deep-wall socket, extensions, and a wrench to attach the cleat.

The Versa Cleater is the ideal, versatile tool to attach Versa-Cleat® to the joints of DM ‘35’ and ‘45’ Systems, TDC connections, and some TDF profiles when space is not a consideration.

Similarly, the Snapper is the ideal tool for attaching cleat to the WDCI Flange, or TDC/TDF cleat to the flange profile.

Rapidmate Slide-On Flange Corners

The Rapidmate Corner lineup is the most advanced design, labor-saving corner system in the industry, with features that save time and money in both the shop and the field.  This corner and fastener system provides an alternative method of efficiently assembling, aligning, connecting, and securing commercial rectangular duct systems.

In addition to their more common TDC/TDF profiles, Rapidmate Corners are also available for the DM35 and WDCI J slide-on flange systems. The DM35 Rapidmate 3A corner features a downset design to ensure a superior seal at the duct and corner, and an embossed pillow design for enhanced corner strength and fit. The DM35 12-gauge heavy corners and WDCI J 11-gauge corners have been designed for added strength.

Isolation Hanger Type SI

The Isolation Hanger Type SI is a sturdy, vibration-isolating steel hanging bracket featuring a rubber isolation pad, designed for use with threaded rods to suspend ductwork and other equipment, isolating vibration at its source.

Capable of supporting up to 1100 lbs (499 kg), the sturdy tension brackets have a much greater load-bearing capacity than the corresponding threaded rods.  Its styrene-butadiene rubber padding isolates vibration at its source, preventing distracting noise transmission and extending the lifespan of HVAC equipment by reducing wear and tear. The outside dimensions match standard wrench sizes, so no special tools are required, making installation easy. The open space of the bracket corresponds to the width of the nut, preventing it from turning.


INDUSTRY NEWS & MORE:

Ductmate Value-Added Services

Ductmate offers a variety of value-added services and resources, including a rectangular duct construction standards guide, specialized product assistance and support, engineering assistance and product specification review, custom cut-to-length services, hands-on training, and online resources. We encourage you to take advantage of these value-added services and resources available to you to make your next job as simple as possible! 

Want to learn more? Click here to read the full article.

Gasketing 101: A Guide to Sealing Ductmate Rectangular Flange Connector Systems

Without proper gasketing, improperly sealed ductwork can leak up to 30% of air, resulting in waste and forcing the system to work harder. Over time, this can lead to system failure and costly repairs. Prioritizing proper gasket application is not only best practice but also crucial for maximizing energy efficiency, extending system lifespan, and meeting building codes and standards.

Looking to learn gasketing best practices? Click here to read the full article.

Removable & Breakaway Fastener Connections Available for Rectangular Flange Systems

Ductmate offers removable and breakaway connections for rectangular flange connection systems.

Interested? Click here to learn more.

BIM Models

Did you know we offer BIM models for some of our most popular products to enhance and streamline building planning, design, and construction?

Click here to request access now.


PRODUCT UPDATES:

Florida Product Number Now Available for Hurricane Air Brace

Hurricane Air Brace now has its own Florida Product Approval Number (FL#47567)!

The Hurricane Air Brace is a direct-mount hanging bracket to support condenser units, heat pumps, and other HVAC equipment, particularly useful in residential or multi-family dwelling applications where flooding, snowfall, mud, and steep grades are a concern.

Approved for use in high-velocity hurricane zones, this direct-mount hanging bracket meets Florida’s high safety and quality standards, providing you with peace of mind whether you’re in a coastal area or simply preparing for severe weather.


Ready to Buy?

Ductmate products are available at over 350 locations across the US as part of a selective distribution network.  Use the Ductmate distributor locator map to find a distributor near you.

Outside the US? Check out our international distributor list.  For detailed information on product availability, lead times, or other international sales requests, please email ductmate@ductmate.com.

Sign up for Ductmate’s e-Newsletter

Don’t miss our monthly e-newsletter!  Click here and sign up to receive exclusive Ductmate news and announcements, product information, promotions, industry news, and more, right in your inbox.

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