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INFERNEX® – High Temp Coatings Engineered for Demanding Applications
Proven Protection for Extreme Heat and Harsh Environments
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INFERNEX® high temp coatings protect exhaust systems, engines, industrial equipment, and other components exposed to elevated temperatures and demanding operating conditions. Available in liquid, powder, and aerosol systems, INFERNEX® combines heat resistance with corrosion protection and long-term durability.
Built for More Than Heat
High-temperature coating performance isn’t determined by temperature alone. Thermal cycling, corrosion, UV exposure, substrate, and application conditions can all affect how a coating performs over time.
INFERNEX® is engineered with these real-world demands in mind, helping manufacturers protect high-heat components while meeting the performance and production requirements of their application.
Why INFERNEX®
Performance Beyond Temperature
Engineered to address heat, corrosion, weathering, adhesion, and other demanding service conditions
Multiple Coating Technologies
Liquid, powder, and aerosol systems provide options for different production processes and application requirements
Proven in Demanding Applications
Used on exhaust systems, engines, silencers, industrial equipment, and other high-heat components
Technical Expertise & Support
Forrest works with customers to evaluate operating conditions, substrates, production needs, and performance requirements to identify the right coating system
Who It’s For
INFERNEX® high temp coatings are trusted by organizations that require reliable protection for components exposed to extreme heat. Typical users include:
- OEM manufacturers
- Industrial equipment manufacturers
- Powder coaters
- Fabricators
- Engineers and specifiers
- Industrial maintenance professionals
Common Applications
INFERNEX® protects metal components exposed to continuous heat, thermal cycling, and harsh operating conditions. Common applications include:
- Exhaust systems
- Mufflers and silencers
- Engines
- Heat shields
- Boilers
- Smokestacks
- Fire pits and grills
- Industrial equipment
- Agricultural and construction equipment
- Emissions control systems
Choose the Right INFERNEX® System
INFERNEX® is available in liquid, powder, and aerosol formulations to meet different manufacturing processes, operating conditions, and application needs. Use the guide below as a starting point, then explore individual products for detailed performance specifications.
| COATING TYPE | BEST FOR | KEY ADVANTAGES | AVAILABLE TEMPERATURE RANGE* |
| Liquid Coatings | OEM manufacturing, industrial equipment, exhaust systems, and applications requiring specialized performance | Broad range of formulations, corrosion protection, exterior durability, specialized chemistries | Up to 1200 °F |
| Powder Coatings | Product environments with powder coating capabilities | Durable finishes, efficient application, strong adhesion, multiple finish and performance options | 600 °F to 1000 °F |
| Aerosols | Touch-up of INFERNEX® liquid and powder coating systems | Convenient application for assembly, field service, and coating repair | Up to 1200 °F |
*Temperature capabilities vary by product. See individual product specifications.
INFERNEX® Liquid Coatings
Originally engineered for high temperature resistance, INFERNEX® L-1200 has proven itself a reliable coating for more than 30 years due to its unique blend of pigments in a silicone polymer resin. Designed for rapid curing and good film integrity, this product also provides good corrosion protection to various substrates.
Key Properties
| Peak Temp | 1200 °F (648 °C) | Continuous | 1100 °F (593 °C) |
| Adhesion (1 Hr) ASTM D3359 | 4B | Color Change (8 Hrs) | PASS |
| 240 Hrs Salt Spray ASTM B117/D1654 | PASS | Pencil Hardness ASTM 3363 | H |
| Gloss @ 60° ASTM D523-14 | 2 – 5 | Accelerated Weathering (QUV A) ASTM D4587-11 | 100% Gloss Retention |
Zinc-Loaded High Temperature Protection Without Primer
INFERNEX® LZ-1100 is a zinc-loaded formulation which means no primer necessary! This coating has excellent color and gloss retention. For superior corrosion resistance on exterior surfaces especially at temperatures up to 1100° F (593° C).
Key Properties
| Peak Temp | 1200 °F (648 °C) | Continuous | 1100 °F (593 °C) |
| Adhesion (1 Hr) ASTM D3359 | 4B | Color Change (8 Hrs) | PASS |
| 200 Hrs Salt Spray ASTM B117/D1654 | PASS | Gloss @ 60° ASTM D523-14 | 0-5 |
INFERNEX® L-1100 was originally engineered for barbeque protection with additional animal and vegetable fats resistance. Its unique epoxy formula performs at a peak temperature of 1100° F (593° C). It’s become a top seller in the INFERNEX® line-up with a durable black satin finish with excellent mar and corrosion resistance.
Key Properties
| Peak Temp | 1100 °F (593 °C) | Continuous | 1100 °F (593 °C) |
| Adhesion (1 Hr) ASTM D3359 | 5B | Color Change (8 Hrs) | PASS |
| 240 Hrs Salt Spray ASTM B117/D1654 | PASS | Pencil Hardness ASTM 3363 | H |
| Gloss @ 60° ASTM D523-14 | 5- 10 |
INFERNEX® LB-1100 High Temp Baking Enamel is qualified for use on exhaust system components by an international agricultural equipment manufacturer. INFERNEX® LB-1100 offers breakthrough performance in long-term durability and corrosion resistance for machine exhaust systems in exterior working environments. Qualified for use on cold-rolled and hot-rolled, aluminized, and stainless steel substrates with pre-thermal and post-thermal shock standards that meet or exceed industry standards.
Key Properties
| Peak Temp | 1100 °F (593 °C) | Continuous | 1100 °F (593 °C) |
| Adhesion (1 Hr) ASTM D3359 | 4B+ | Color Change (8 Hrs) | PASS |
| 24 Hrs Salt Spray ASTM B117/D1654 | PASS | Pencil Hardness ASTM 3363 | H+ |
| Gloss @ 60° ASTM D523-14 | 1 – 5 | Solvent Resistance ASTM D4752 | 100+ MEK rub |
This INFERNEX® liquid was formulated for rapid curing and corrosion resistance with very good exterior durability. It has a unique balance of excellent pre- and post-burn adhesion and color retention up to 800° F (426° C). Its flat black finish applies smoothly to ferrous and non-ferrous substrates.
Key Properties
| Peak Temp | 800 °F (426 °C) | Continuous | 800 °F (426 °C) |
| Adhesion (1 Hr) ASTM D3359 | 5B | Color Change (8 Hrs) | PASS |
| Accelerate Weathering (QUV A) ASTM D4587-11 | 60% Gloss Retention 300 Hrs | Gloss @ 60° ASTM D523-14 | 4 – 6 |
A Silicone heat resistant primer designed for good working properties over ferrous and non-ferrous metal surfaces to improve adhesion and rust resistance. Intended to be top coated by one of FORREST’s high temperature finish coatings, including INFERNEX® LB-1100 (55B290) for maximum performance.
The recommended force-cure schedule is 400°F (204°C) for 30 minutes to ensure proper film development and adhesion.
Recommended for OEM, equipment manufacturers, and industrial coaters requiring a heat-cured baked enamel paint system. Suitable for cold-rolled, hot-rolled, aluminized, and stainless steel substrates.
Key Properties
| Adhesion (1 Hr) ASTM D3359 | 4B | Pencil Hardness ASTM 3363 | F+ |
| 96 Hrs Salt Fog ASTM B117-D1654 | PASS | Solvent Resistance ASTM D4752 | 100+ MEK |
INFERNEX® Powder Coatings
Originally developed for exhaust systems, PS-1000 has become a trusted high temperature powder coating for exhausts, engines, and silencers. Its smooth black finish provides excellent application properties, over-bake stability, and reliable performance on properly prepared ferrous and non-ferrous substrates.
Key Properties
| Peak Temp | 1000 °F (537 °C) | Continuous | 880 °F (471 °C) |
| Adhesion (1 Hr) ASTM D3359 | 4B | Color Change (8 Hrs) | PASS |
| Accelerated Weathering (QUV A) ASTM D4587-11 | dE 0.11 300 Hrs | Gloss @ 60° ASTM D523-14 | 12 – 18 |
| Impact Resistance ASTM D2794-90 | 80 in-lbs | Pencil Hardness ASTM 3363 | 3H |
| Cure Cycle 20 Minutes @ | 450 °F (232 °C) |
Originally developed for exhaust systems, PS-1000 Silver delivers the same proven performance as the black formulation in silver finish. It offers excellent application properties, over-bake stability, and reliable performance on properly prepared ferrous and non-ferrous substrates.
Key Properties
| Peak Temp | 1000 °F (537 °C) | Continuous | 800 °F (427 °C) |
| Adhesion (1 Hr) ASTM D3359 | 4B | Color Change (8 Hrs) | PASS |
| Accelerated Weathering (QUV A) ASTM D4587-11 | dE 0.09 300 Hrs | Gloss @ 60° ASTM D523-14 | 12 – 18 |
| Impact Resistance ASTM D2794-90 | 10 in-lbs | Pencil Hardness ASTM 3363 | H |
| Cure Cycle 20 Minutes @ | 450 °F (232 °C) |
Designed for high-temperature decorative applications, this textured flat black powder delivers an ultra-low gloss finish ideal for outdoor fireplaces, engines, and exhausts. It offers excellent corrosion resistance, UV durability, and film quality, and withstands temperatures up to 1000 °F (537 °C).
Key Properties
| Peak Temp | 1000 °F (537 °C) | Continuous | 800 °F (427 °C) |
| Adhesion (1 Hr) ASTM D3359 | 5B | Color Change (8 Hrs) | PASS |
| 336 Hrs Salt Spray ASTM B117/D1654 | PASS | Gloss @ 60° ASTM D523-14 | 1.5 -2.5 |
| Accelerated Weathering (QUV A) ASTM D4587-11 | dE2000 576 Hrs | Pencil Hardness ASTM 3363 | 5H |
| Impact Resistance ASTM D2794-90 | 100 in-lbs | Cure Cycle 17 Minutes @ | 428 °F (220 °C) |
INFERNEX® PT-1000 was developed to produce a slightly textured black coating with great pre- and post-burn adhesion. This satin powder coating performs well at a continuous 800 °F (426° C) and offers a balance of function and appearance. Performance testing of one hour at 1000 °F resulted in very good adhesion.
Key Properties
| Peak Temp | 1000 °F (537 °C) | Continuous | 800 °F (426 °C) |
| Adhesion (1 Hr) ASTM D3359 | 4B | Color Change (24 Hrs) | PASS |
| 190 Hrs Salt Spray ASTM B117/D1654 | PASS | Gloss @ 60° ASTM D523-14 | 15-25 |
| Impact Resistance ASTM D2794-90 | 40 in-lbs | Pencil Hardness ASTM 3363 | 3H |
| Cure Cycle 20 Minutes @ | 400 °F (204 °C) |
INFERNEX® PSS-1000 produces a smooth satin black finish for applications where appearance and exterior durability are equally important. It delivers excellent film quality and dependable high temperature performance on ferrous and non-ferrous substrates.
Key Properties
| Peak Temp | 600 °F (316 °C) | Continuous | 500 °F (260 °C) |
| Adhesion (1 Hr) ASTM D3359 | 4B | Color Change (8 Hrs) | PASS |
| Accelerated Weathering (QUV A) ASTM D4587-11 | dE 0.10 6188 Hrs | Gloss @ 60° ASTM D523-14 | 25 – 35 |
| Impact Resistance ASTM D2794-90 | 40 in-lbs | Pencil Hardness ASTM 3363 | H |
| Cure Cycle 20 Minutes @ | 450 °F (232 °C) |
PS-800 features a smooth satin jet black finish with excellent hardness and exterior durability. Proven for years in exhaust and muffler applications, it delivers reliable performance at temperatures up to 800 °F (426 °C).
Key Properties
| Peak Temp | 800 °F (426 °C) | Continuous | 800 °F (426 °C) |
| Adhesion (8 Hr) ASTM D3359 | 5B | Color Change (8 Hrs) | PASS |
| Accelerated Weathering (QUV A) ASTM D4587-11 | dE 0.45 300 Hrs | Gloss @ 60° ASTM D523-14 | 25 – 35 |
| Impact Resistance ASTM D2794-90 | 40 in-lbs | Pencil Hardness ASTM 3363 | 2H |
| Cure Cycle 10 Minutes @ | 450 °F (232 °C) |
PS-600 combines corrosion resistance with a smooth flat black finish for moderate temperature applications. Designed to withstand harsh environments, it delivers dependable protection while maintaining an attractive appearance.
Key Properties
| Peak Temp | 700 °F (371 °C) | Continuous | 600 °F (315 °C) |
| Adhesion (1 Hr) | 3B | Color Change (24 Hrs) | PASS |
| 500 Hrs Salt Spray ASTM D523-D1654 | PASS | Impact Resistance ASTM D2794-90 | 40 in-lbs |
| Gloss @ 60° ASTM D523-14 | 5 – 10 | Pencil Hardness ASTM 3363 | H |
| Cure Cycle 20 Minutes @ | 450 °F (232 °C) |
INFERNEX® Aerosol Coatings
Touch Up for INFERNEX® Liquid
Key Properties
| Peak Temp | 1200 °F (649 °C) | Color | Black |
| Recommended For | L-1200 (62H2901LINF) |
Key Properties
| Peak Temp | 1100 °F (593 °C) | Color | Black |
| Recommended For | L-1100 (54H2041LINF) |
Key Properties
| Peak Temp | 1000 °F (538 °C) | Color | Black |
| Recommended For | LZ-1000 (251H2194LINF) | Additives | Zinc |
Key Properties
| Peak Temp | 1000 °F (538 °C) | Color | Charcoal |
| Recommended For | LZ-1000 (251H2014LINF) | Additives | Zinc |
Key Properties
| Peak Temp | 800 °F (427 °C) | Color | Black |
| Recommended For | L-800 (62H241LINF) |
Touch Up for INFERNEX® Powder
Key Properties
| Peak Temp | 1000 °F (538 °C) | Color | Black |
| Recommended For | PSS-1000 (1PC-653-2900BX501NF) |
Key Properties
| Peak Temp | 1000 °F (538 °C) | Color | Semi-Gloss Black |
| Recommended For | PS-1000 (1PC-653-2900BX501NF) |
Key Properties
| Peak Temp | 1000 °F (538 °C) | Color | Silver |
| Recommended For | PS-1000 (1PC-654-0199BX50INF) |
Key Properties
| Peak Temp | 800 °F (427 °C) | Color | Black |
| Recommended For | PS-800 (1PC-654-2502BX501NF) |
Find the Right INFERNEX® Coating for Your Application
Operating temperature is only the starting point. Our coatings specialists can help evaluate your substrate, environment, production process, and performance requirements to identify the INFERNEX® system best suited for your application.
FAQS
High temp coatings are specially formulated coatings designed to protect metal components exposed to elevated temperatures while maintaining adhesion, appearance, and corrosion resistance.
Peak temperature refers to the highest intermittent temperature a coating can withstand for short periods. Continuous temperature indicates the maximum operating temperature the coating can tolerate over extended service life.
The best choice depends on your manufacturing process, substrate, appearance requirements, operating environment, and production goals. Forrest can help evaluate your application and recommend the most appropriate system.
Yes. Many INFERNEX® products are specifically engineered for exterior exposure, combining heat resistance with corrosion protection and weatherability.
Not always. Some INFERNEX® formulations, such as zinc-loaded systems, may eliminate the need for a primer depending on the substrate and operating environment.
Yes. Forrest regularly partners with manufacturers to develop custom coating formulations that address unique performance, application, and production requirements.