Arcseam FN 340 Non-Round Food End Sealing Compound
A water-based elastomer sealing compound rheologically matched to die-liner and showerhead application on rectangular, oval and oblong food ends that a rotating nozzle cannot follow. Its retort duty matches the round food grade; the difference is how the bead is laid down.
Grade Arcseam FN 340 | Range Can-End and Seam Sealing Compounds | Technology Water-based elastomer dispersion, shear-thinning die-liner grade
Technical Data Sheet
Arcseam FN 340
Issue 2026.09
1. Product description
A compound rheologically matched to die-liner and showerhead application, for rectangular, oval and oblong food ends that a rotating nozzle cannot follow. It is shear thinning enough to flow evenly along a straight run and around a tight corner radius, then to recover quickly so the bead does not slump in the corners before drying. Retort duty matches the round food grade, with the difference being how the compound is laid down rather than what it has to survive.
2. Features
- Shear thinning, to flow evenly along straight runs and around tight corner radii
- Fast structural recovery, so the bead does not slump in the corners before drying
- Matched to die-liner and showerhead lining of non-round curls
- Retort duty equivalent to the round food end grade
3. Recommended uses
Rectangular, oval and oblong tinplate and ECCS food ends for fish, meat and pet food packs, including packs that are retort sterilised under overpressure.
Substrates. Internally lacquered tinplate and ECCS non-round ends, including fish, meat and pet food formats.
4. Typical properties
| Property | Typical value | Method |
|---|---|---|
| Technology | Water-based elastomer dispersion, shear-thinning die-liner grade | Formulation |
| Appearance | Smooth, homogeneous fluid dispersion, free of lumps and skin | customer or supplier protocol |
| Volatile organic compound content | typically below 50 g/l, water is the principal carrier | ISO 11890-2 |
| Non-volatile matter (solids) | 50 to 60 % by weight | ISO 3251 |
| Viscosity, rotational, at 23 degrees Celsius | 6,000 to 15,000 mPa.s, spindle and speed as stated on the Certificate of Analysis | ISO 2555 |
| pH as supplied | 8.0 to 11.0 | ISO 976 |
| Density at 20 degrees Celsius | 1.05 to 1.25 g/cm3 | ISO 2811-1 |
| Sieve residue (grit) on a 100 micrometre mesh | below 0.05 % by weight | ISO 4576 |
| Dry deposit weight per end | about 80 to 400 mg per end, set by format dimensions and measured curl void | In-house, gravimetric, end weighed before and after lining and drying |
| Compression set of the dried compound | 20 to 35 % | In-house, on cast test pieces, adapted from ASTM D395 Method B |
Typical values, not a specification. Values for each batch are given on its Certificate of Analysis.
5. Application
| Parameter | Guidance |
|---|---|
| Application method | Die-liner, which presents the whole curl profile at once, or showerhead, which floods the curl and relies on the compound's rheology to level. |
| End preparation | Line onto formed and curled non-round shells of internally lacquered tinplate or ECCS with the lacquer fully cured. Confirm adhesion and clean release from the tooling on the lacquer in use. |
| Preparation and dilution | Supplied ready for use and not thinned as a matter of routine. Stir slowly to redisperse any settlement, avoid high-shear stirring that aerates the compound, and agitate gently in the day tank so solids stay uniform across the shift. |
| Dry deposit weight | About 80 to 400 mg per end, set to fill the measured curl void along the straight runs and at the corners; check-weigh ends at intervals through the shift. |
| Drying schedule | Oven, air 80 to 160 degrees Celsius, dwell about 3 to 10 min, set by end gauge and deposit weight. Confirm the bead is coherent and tack free at the corners as well as the straight runs. |
| Next step | Seaming onto the body. Qualification is by double-seam teardown and pack integrity after the full sterilisation cycle, on the customer's own line. |
Process. Die-liner or showerhead application, oven drying.
6. Storage and handling
Store in the original closed containers at 5 to 35 degrees Celsius, protect from frost and keep out of direct sun; stir slowly before use. Shelf life is stated on the label and the Certificate of Analysis. Handle and use the product in line with its Safety Data Sheet.
7. Safety and regulatory information
Read the Safety Data Sheet before use. Safety Data Sheets and regulatory declarations are issued by our technical centre against the product and batch supplied, so they are sent on request rather than published. Request a Safety Data Sheet or declaration.
This Technical Data Sheet is published for on-screen reference. The information is given in good faith from laboratory and application experience and describes typical values; it is not a specification and does not replace a trial on your own substrate and line. Arctic Materials may revise this sheet without notice. Issue 2026.09.
Technical Data Sheets on this site are for on-screen viewing. For a controlled copy, write to tech@arcticmaterials.com.
Other grades in this range
Need a Safety Data Sheet, a regulatory declaration or a grade specified to your line? Contact our technical centre.