Eliminating the Guesswork: Mastering Casing End Seals with Denso-Viscotaq
In the field, real-world conditions rarely match engineering drawings. Casing end seals are no exception. Pipes shift, measurements mislead, and unexpected gaps appear—especially under highways, railroads, or aging roadbeds where carrier pipes pass through thick-walled casings for structural support. Whether you’re working beneath I-75 in Lima, Ohio or navigating aging infrastructure beneath I-90/I-94 through Chicago, your sealing solution needs to adapt.
That’s where the Denso-Viscotaq™ Casing End Seal System shines—and why hands-on training is critical for your team.

The Real-World Challenge
Casing end seals often fail for one simple reason: the unexpected. Pipes aren’t centered. Casing sizes don’t match drawings. Traditional seals can’t accommodate skewed angles or odd sizes—allowing water ingress and accelerating corrosion at one of the most vulnerable transition points in your pipeline.
These gaps expose your system to electrolytes and moisture, leading to corrosion, coating breakdown, and costly repairs.
The Field-Tested Solution
The Denso-Viscotaq System offers a flexible, durable, and easy-to-install solution that eliminates the need for perfect alignment. The system combines:
ViscoMastic™ packed into angular voids to displace air and moisture
ViscoWrap™ to provide continuous viscoelastic sealing across the interface
Denso Glass Outerwrap™ to deliver mechanical protection and durability
This layering not only boosts protection but also speeds up backfill and minimizes insurance costs by reducing open-ditch time.

Why Training Matters
Every site is different. During a recent training beneath a highway crossing, one crew arrived expecting a 20″ carrier pipe in a 24″ casing—only to discover a 26″ casing. In another case, the casing was smaller than expected, making the prefabricated seals too loose. These are the challenges our training addresses.
Our Casing End Seal Training walks your crew through:
Assessing pipe and casing discrepancies
Field-friendly surface preparation
Proper application of mastic and wraps for varying conditions
Handling misalignments and non-standard geometries
Best practices for minimizing rework and ensuring long-term protection

Book a Training Today
Whether you’re dealing with uncentered carrier pipes, outdated drawings, or high-risk environments, our Denso-Viscotaq Casing End Seal training equips your team to seal the deal—literally.
Get in touch today call us at 248-735-7000 or fill out the form below to schedule a session with our field experts and reduce your downtime, rework, and corrosion risk.