--- title: CIRKIT NOVASEAL – Heat-Seal Lacquers for Paper Packaging | Siegwerk description: "CIRKIT NOVASEAL by Siegwerk: heat-seal lacquers for paper-based and aluminum foil packaging. Five grades for gravure & flexo, low-SIT options, recyclable structures." --- New Portfolio · 2026 # CIRKIT NOVASEAL — Heat Seal Lacquers for Circular Packaging Sustainable heat seal coatings for flexible, fiber-based packaging — and beyond. Five engineered products. One trusted portfolio. CIRKIT NOVASEAL delivers reliable, energy-efficient sealing performance for paper-based packaging — with selected solutions also approved for aluminum foil. [Talk to Experts →](https://news.siegwerk.com/cirkit-novaseal-heat-seal-lacquers#talk-expert) [Find the Right Product](https://news.siegwerk.com/cirkit-novaseal-heat-seal-lacquers#find-grade) ![Paper packaging with heat-seal coating](https://news.siegwerk.com/hubfs/2026-circular-coatings/pasta-packaging-cirkit-novaseal.webp) Recyclable Packaging Structures High Bond Strength Excellent Hot Tack Energy- Efficient Processing Why CIRKIT NOVASEAL ## Choice, not compromise. CIRKIT NOVASEAL combines performance flexibility with process efficiency. The portfolio offers heat seal lacquers tailored to different substrates, applications, and production requirements — helping converters achieve reliable sealing while optimizing energy use and line speed. 01 ### Consistent Seal Performance Reliable pack integrity across products — engineered for predictable results at scale. 02 ### Low Seal Initiation Temperature Selected products enable energy-efficient processing through low to very low sealing temperatures. 03 ### Excellent Hot Tack Built for demanding, high-speed forming and filling operations without compromise. 04 ### High Bond Strength Reliable seal strength — even at reduced sealing temperatures. 05 ### Gravure & Flexo Compatible Four of five products work seamlessly with both gravure and flexographic application. 06 ### Recyclable by Design Enables recyclable paper-based and aluminum foil packaging structures. Portfolio Overview ## Five products. One clear choice for every job. A structured, concise product range — so converters can match the right heat seal lacquer to the specific packaging challenge without unnecessary complexity. | Feature | CIRKIT NOVASEAL 1609 | CIRKIT NOVASEAL 1906 | CIRKIT NOVASEAL 1643 | CIRKIT NOVASEAL 1909 | CIRKIT NOVASEAL 1677 | | --- | --- | --- | --- | --- | --- | | Solid content [%] | 22 | 32 | 45 | 45 | 54 | | Viscosity DIN4 cup [s] | 30–60 | 15–35 | 20–45 | 20–30 | 20–40 | | Viscosity [mPa·s, 100/s at 23°C] | < 300 | < 500 | < 500 | < 500 | < 500 | | Heat-sealing | ✓ | ✓ | ✓ | ✓ | ✓ | | Hot-tack | ✓ | ✓ | ✓ | ✓ | ✓ | | Key differentiator | High-speed performance | Excellent hot tack | Good SBS, low coatweight | Low Seal Initiation Temp. | High solid content | | Application method | Gravure | Gravure, Flexo | Gravure, Flexo | Gravure, Flexo | Gravure, Flexo | Technical data sheets available on request. Our experts will support you with the right product selection for your application. ## Ready to find your perfect product? Our coating specialists help you match the right CIRKIT NOVASEAL product to your line, substrate and application. [Talk to an Expert →](https://news.siegwerk.com/cirkit-novaseal-heat-seal-lacquers#talk-expert) Decision Helper ## Which solution is right for you? A quick orientation by primary use case. For application-specific guidance, talk to our coating specialists. CIRKIT NOVASEAL 1609 High-Speed Lines Choose when production line speed is the priority and consistent performance at scale matters most. CIRKIT NOVASEAL 1906 Hot-Tack Critical Ideal for demanding form-fill-seal operations where strong immediate bond strength is required. CIRKIT NOVASEAL 1643 Efficient Coating Delivers good seal bond strength at low coat weight — efficient material usage without compromising performance. CIRKIT NOVASEAL 1909 Energy Savings Low seal initiation temperature for energy-efficient processing and reduced thermal impact on substrates. CIRKIT NOVASEAL 1677 High Solid Content High solid content (54%) for productive, lean coating processes — fewer passes, more output. ## Sealing performance, fiber-based future. CIRKIT NOVASEAL enables functional performance within circular packaging designs. The portfolio supports the global shift toward paper-based packaging — without sacrificing the sealing reliability your applications demand. Selected products  also perform on aluminum foil for hybrid recyclable structures. Paper Primary substrate for all CIRKIT NOVASEAL products Alu Foil Compatible with selected solutions in the portfolio PPWR Designed to support recyclable structures under EU regulation Proven Expertise ## Backed by Siegwerk. With CIRKIT NOVASEAL, customers gain access not only to a robust heat-sealing lacquer portfolio, but to Siegwerk's global technical expertise, application know-how, and dedicated customer support. As part of the wider CIRKIT functional coatings family — alongside CIRKIT BAR, CIRKIT BAR SEAL, CIRKIT NATUBAR and others — CIRKIT NOVASEAL is built on decades of coating innovation for sustainable packaging. ## Talk to our CIRKIT NOVASEAL experts. Our coating specialists are ready to support you with the right product selection, application guidance, and performance optimization for your packaging requirements. ### CIRKIT NOVASEAL Expert ![CIRKIT NOVASEAL expert Oliver Waddington](https://news.siegwerk.com/hs-fs/hubfs/2026-circular-coatings/oliver-waddington.webp?width=110&name=oliver-waddington.webp) **Oliver Waddington ** [coatings@siegwerk.com](mailto:coatings@siegwerk.com) ### Ask our experts about CIRKIT NOVASEAL What is CIRKIT NOVASEAL? CIRKIT NOVASEAL is Siegwerk's dedicated portfolio of heat-sealing lacquers for paper-based packaging and aluminum foil. It includes five products — CIRKIT NOVASEAL 1609, 1906, 1643, 1909 and 1677 — engineered for different sealing temperatures, line speeds, and bond-strength requirements. Which substrates does CIRKIT NOVASEAL work on? CIRKIT NOVASEAL is designed primarily for paper-based packaging applications. Several solutions within the portfolio are also approved for use on aluminum foil, enabling hybrid recyclable packaging structures. Is CIRKIT NOVASEAL suitable for recyclable packaging? Yes. CIRKIT NOVASEAL is designed to enable recyclable paper-based packaging structures and directly supports the paperization trend toward fiber-based packaging — in line with the requirements of upcoming EU regulations such as PPWR. Can CIRKIT NOVASEAL be applied via gravure and flexo printing? Yes. The portfolio offers solutions for both gravure and flexographic application. CIRKIT NOVASEAL 1609 is optimized for gravure; the remaining four solutions (1906, 1643, 1909, 1677) support both gravure and flexo. Which NOVASEAL product should I choose for my application? It depends on your priority: CIRKIT NOVASEAL 1609 for high-speed performance, CIRKIT NOVASEAL 1906 for excellent hot tack, CIRKIT NOVASEAL 1643 for good seal bond strength at low coat weight, CIRKIT NOVASEAL 1909 for low seal initiation temperature (energy-efficient), and CIRKIT NOVASEAL 1677 for high solid content. Our coating specialists can help you select the right solution based on your specific line, substrate and end-use. How can I get technical data sheets or samples? Technical data sheets and samples are available on request through our coating specialists. Use the contact form below or reach out to your local Siegwerk representative — we typically respond within two business days. - - - - ```json { "@context" : "https://schema.org", "@type" : "Product", "brand" : { "@type" : "Brand", "name" : "Siegwerk" }, "category" : "Heat-Seal Lacquers", "description" : "Portfolio of water- and solvent-based heat-sealing lacquers for paper-based packaging and aluminum foil, supporting recyclable, fiber-based packaging structures. Five grades engineered for different sealing temperatures, line speeds, and bond-strength requirements.", "manufacturer" : { "@type" : "Organization", "name" : "Siegwerk Druckfarben AG & Co. KGaA", "url" : "https://www.siegwerk.com" }, "name" : "CIRKIT NOVASEAL" } ``` ```json { "@context" : "https://schema.org", "@type" : "FAQPage", "mainEntity" : [ { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "CIRKIT NOVASEAL is Siegwerk's dedicated portfolio of heat-sealing lacquers for paper-based packaging and aluminum foil. It includes five grades — NOVASEAL 1609, 1906, 1643, 1909 and 1677 — engineered for different sealing temperatures, line speeds, and bond-strength requirements." }, "name" : "What is CIRKIT NOVASEAL?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "CIRKIT NOVASEAL is designed primarily for paper-based packaging applications. Several grades within the portfolio are also approved for use on aluminum foil, enabling hybrid recyclable packaging structures." }, "name" : "Which substrates does CIRKIT NOVASEAL work on?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Yes. CIRKIT NOVASEAL is designed to enable recyclable paper-based packaging structures and directly supports the paperization trend toward fiber-based packaging — in line with the requirements of upcoming EU regulations such as PPWR." }, "name" : "Is CIRKIT NOVASEAL suitable for recyclable packaging?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Yes. The portfolio offers solutions for both gravure and flexographic application. NOVASEAL 1609 is optimized for gravure; the remaining four grades (1906, 1643, 1909, 1677) support both gravure and flexo." }, "name" : "Can CIRKIT NOVASEAL be applied via gravure and flexo printing?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "It depends on your priority: NOVASEAL 1609 for high-speed performance, 1906 for excellent hot tack, 1643 for good seal bond strength at low coat weight, 1909 for low seal initiation temperature (energy-efficient), and 1677 for high solid content. Our coating specialists can help you select the right grade based on your specific line, substrate and end-use." }, "name" : "Which NOVASEAL grade should I choose for my application?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "CIRKIT NOVASEAL is specifically focused on heat-sealing lacquers for fiber-based and aluminum foil packaging, offered as a structured multi-grade portfolio. The broader CIRKIT range also includes CIRKIT SEAL (sealing coatings for OPP and alu-foil) and CIRKIT BAR SEAL (combined barrier and heat-seal coatings). Your Siegwerk contact can advise on which family fits your application best." }, "name" : "How does CIRKIT NOVASEAL differ from CIRKIT SEAL or CIRKIT BAR SEAL?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Technical data sheets and samples are available on request through our coating specialists. Use the contact form below or reach out to your local Siegwerk representative — we typically respond within two business days." }, "name" : "How can I get technical data sheets or samples?" } ] } ```