Understanding ASJ Tapes: Why Ideal’s 728 and 729 Stand Out
Understanding ASJ Tapes: Why Ideal’s 728 and 729 Stand Out
When it comes to insulation, a clean finish and a tight seal are a must. That’s where Ideal’s ASJ (All-Service Jacket) tapes step in. Designed specifically for insulation systems with ASJ facings and made with our specially formulated Cold Seal™ cold weather acrylic adhesive.
Built to withstand real-world jobsite conditions, Ideal’s ASJ tapes offer reliable adhesion, resistance to tearing, and a clean, professional finish that maintains the integrity of your insulation system.
What is ASJ?
ASJ stands for All Service Jacket, a durable, multi-layer jacket made from white kraft paper, scrim, and foil. Primarily used on fiberglass pipe insulation, ASJ acts as a vapor barrier, helping to maintain thermal performance while offering a clean, professional appearance. Its layered construction also provides added strength and tear resistance, making it ideal for demanding insulation systems.
To maintain the integrity of ASJ-jacketed insulation, it’s essential to properly seal all seams and joints. That’s where Ideal’s Cold Seal™ ASJ tapes come in. Manufactured from the same materials as the jacket itself, these tapes blend seamlessly for a uniform look while reinforcing the vapor barrier and delivering long-lasting protection against leaks, wear, and environmental exposure.
Two Trusted Options
Cold Seal™ 728 ASJ
If you’re working with traditional ASJ-faced insulation, 728 is your go-to. It features a white kraft tape finish and permanent hold that blends in seamlessly for a clean, professional appearance.
Cold Seal™ 729 ASJ+
Working with paper-free (WMP®) jackets? The 729 is specifically designed for compatibility with modern polypropylene-based jackets. Thanks to its WMP surface, it stays cleaner and resists dirt buildup over time. 729 is paper-free, making it especially mold resistant and ideal for high humidity areas where moisture is prevalent.
Both tapes are USA compliant and UL 723 Classified, ensuring they meet the highest quality and safety standards. Not only do they perform exceptionally well, but they also provide an aesthetically pleasing finished insulation system—because a job well done should look as good as it functions. Whether you’re looking for a high-strength solution or an economical choice, Ideal’s ASJ tapes offer an option for every application and budget.
Why Choose Ideal’s ASJ Tape?
• Permanent adhesion
• Cold weather adhesive
• Moisture resistant
• A clean matching aesthetic
Ideal’s ASJ tapes aren’t just another product — they’re part of a system built to last. When paired with high-quality insulation and proper install techniques, they help extend the life and performance of your entire assembly.
Final Wrap
No matter what jacket you’re working with — traditional ASJ or NextGen — Ideal’s Cold Seal™ tapes are engineered to deliver a dependable, professional-grade seal. Because when you’re a contractor who takes pride in your work and how it looks, every detail matters from performance to presentation.
If you’re considering ASJ tape for your next project, reach out to our team or explore our website for more information on the right tape for your application! And if FSK tape is also on your radar, check out our last blog, Understanding FSK Tapes, for a full breakdown.
