Arcdom HT 320 Silicone High-Temperature Finish
Arcdom HT 320 is a pure silicone finish for cooking appliance parts that run beyond the continuous service range of a silicone-polyester, such as burner surrounds, flue trims and element panels. It is applied thin by design and completes its cure in a post-cure bake or on the appliance's first heat cycle rather than in the paint oven.
Grade Arcdom HT 320 | Range Appliance Coatings | Technology Solvent-borne pure silicone resin finish with heat-stable inorganic pigment or aluminium flake
Technical Data Sheet
Arcdom HT 320
Issue 2026.09
1. Product description
A pure silicone finish for the hottest parts of a cooking appliance: burner surrounds, flue trims, heater and element panels, grill boxes and exhaust shrouds. It is the top tier of the high-temperature subfamily and is supplied in the limited colour range that survives at temperature, conventionally black and aluminium, because organic pigments will not hold. The film is applied thin by design, since a heavy silicone film cracks on thermal cycling, and it completes its cure in a post-cure bake or on the appliance’s first heat cycle rather than in the paint oven.
2. Features
- Pure silicone binder, the top tier of the Arcdom HT subfamily
- Limited colour range that holds at temperature, conventionally black and aluminium
- Thin film by design, since a heavy silicone film cracks on thermal cycling
- Force dried in the paint shop, with the cure completed in a post-cure bake or on first heat cycle
- No conversion coating required
3. Recommended uses
Burner surrounds, flue trims, heater and element panels, grill boxes and exhaust shrouds on cooking appliances.
Substrates. Aluminised steel, cold rolled steel and stainless steel. A degreased, lightly abraded or shot blasted surface is normal, and a conversion coating is not required.
4. Typical properties
| Property | Typical value | Method |
|---|---|---|
| Technology | Solvent-borne pure silicone resin finish with heat-stable inorganic pigment or aluminium flake | Formulation |
| Colour | Limited range that holds at temperature, conventionally black and aluminium | Visual |
| Non-volatile content | Typically 40 to 55 per cent by weight | ISO 3251 |
| Dry film thickness | Typically 20 to 30 µm; heavier films crack on thermal cycling | ISO 2808 |
| Heat resistance | Typically continuous to about 500 to 550 °C, assessed after repeated heating and cooling cycles for colour change, cracking, blistering and adhesion loss | ASTM D2485 |
| Cross-cut adhesion | Classification 0 to 1 after post-cure and after heat cycling, at 1 mm cut spacing | ISO 2409 |
| Hardness development | The force dried film is not at final hardness; hardness and adhesion are assessed after post-cure | Customer or supplier protocol |
| Cure confirmation | Confirmed by the recorded post-cure of 30 minutes at 230 to 260 °C metal temperature on a test panel, followed by the cross-cut and hardness checks in this sheet. A solvent rub is not used as the release test, because a cured silicone film has limited resistance to ketone solvents and a rub count does not discriminate cure | Customer or supplier protocol |
Typical values, not a specification. Values for each batch are given on its Certificate of Analysis.
5. Application
| Parameter | Guidance |
|---|---|
| Application method | Spray to a low film build; applied to the part after forming, and not for sheet that is formed after coating |
| Surface preparation | Aluminised, cold rolled or stainless steel, degreased and lightly abraded or shot blasted. No conversion coating required |
| Thinning | Only with the thinner specified for the grade, to the spray viscosity set for the equipment at line trial |
| Film thickness | Typically 20 to 30 µm dry, not exceeded |
| Force dry | 10 to 15 minutes at 80 °C |
| Post-cure | 30 minutes at 230 to 260 °C metal temperature, or on the appliance's first heat cycle |
| Handling | The force dried film is not yet at final hardness and is handled accordingly. Light smoke and odour on the first heat cycle are normal as the silicone completes its cure |
Process. Spray to a low film build, force dry 10 to 15 minutes at 80 degrees C, then post-cure 30 minutes at 230 to 260 degrees C metal temperature or on first heat cycle. A force dried film is not yet at final hardness and is handled accordingly, and light smoke and odour on the first heat cycle are normal for a silicone film, so the assembly area is ventilated.
6. Storage and handling
Store in the original tightly closed containers in a cool, dry, covered area away from heat sources and direct sunlight, and stir thoroughly before use. Shelf life is stated on the label and on 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.