SPECHEAT®
2K Silicone 650 Colours
SPECHEAT® 2K Silicone 650 Colours is a two-component, solvent-based high-temperature coating formulated with an air-drying, cross-linking silicone binder and specialised heat-resistant pigments.
Designed for the internal and external protection of steel operating at elevated temperatures, the coating provides excellent adhesion, flexibility, abrasion resistance and weathering performance. It withstands continuous dry temperatures up to 650°C and intermittent temperature surges up to 700°C, making it suitable for severe high-heat industrial applications including furnaces, kilns, stacks, exhaust systems and hot piping.
Features & Benefits
- Extreme temperature resistance
Withstands continuous dry service temperatures up to 650°C. - Intermittent heat resistance
Tolerates temperature surges up to 700°C. - Two-component silicone technology
Cross-linking silicone binder provides high-temperature coating performance. - Ambient temperature drying
The coating initially air dries before heat curing. - Heat-activated full cure
Full properties develop after the specified heating cycle. - Internal and external protection
Suitable for steel surfaces in both interior and exterior environments. - Corrosion protection
Designed to protect steel exposed to elevated operating temperatures. - Excellent adhesion
Provides excellent adhesion to correctly prepared steel and aluminium. - Excellent flexibility
Helps maintain film integrity during service. - Abrasion resistant
Provides excellent resistance to mechanical wear. - Weather resistant
Suitable for externally exposed high-temperature equipment. - Specialised high-temperature colours
Available in red, yellow and blue. - Matt finish
Provides a functional low-sheen industrial appearance. - Long working time
Mixed pot life exceeds six hours under the stated conditions. - Multiple substrate preparation options
Suitable over correctly blast-cleaned or mechanically prepared steel and compatible zinc silicate shop primers.
Intended Uses
SPECHEAT® 2K Silicone 650 Colours is designed for the corrosion protection of steel surfaces operating continuously at elevated temperatures. It is particularly suited to industrial equipment where conventional protective coatings cannot withstand the temperatures generated during operation.
The coating can be used for both internal and external steel protection and is intended for equipment operating at continuous dry temperatures of up to 650°C, with intermittent temperature excursions reaching 700°C.
Because the coating combines high-temperature resistance with adhesion, flexibility, abrasion resistance and exterior weathering performance, it can be used across a range of processing, manufacturing and heavy industrial installations where steel equipment is routinely subjected to extreme heat.
Typical Applications:
- Flare stacks
- Industrial kilns
- Furnace exteriors
- Industrial furnaces
- Flues
- Mufflers
- Exhaust systems
- Industrial exhausts
- Hot piping
- High-temperature pipework
- Stacks
- Chimneys
- Process equipment operating at elevated temperatures
- High-temperature steel structures
- Heated steel components
- Thermal processing equipment
- Industrial heating equipment
- High-temperature plant components
- Steel surfaces exposed to continuous dry heat
- Exterior high-temperature steel equipment
These applications are based on the product's ability to provide corrosion protection while tolerating continuous dry temperatures of 650°C and intermittent temperatures up to 700°C.
Technical Information:
- Product Type: High-temperature resistant coating
- Technology: Two-component silicone
- Binder: Air-drying / cross-linking silicone
- Category: Industrial & Protective – High Temperature Coatings
- Components: 2
- Colours: Red, yellow or blue
- Finish: Matt
- Activator: SPECHEAT 2K Silicone 650 Activator
- Mix Ratio: 9:1
- Density: Approximately 1.1 kg/L
- Volume Solids: 28%
- Pot Life: Greater than 6 hours
- Typical Dry Film Thickness: 25–50 µm DFT per coat
- Typical Wet Film Thickness: 90–178 µm WFT per coat
- Maximum Single-Coat DFT Before Risk of Blistering During Heating: 40 µm
- Theoretical Coverage: Approximately 11.2 m²/L at 25 µm DFT, before allowance for loss factors
- Application Method: Spray
- Recommended Number of Coats: Two coats to achieve the typical total DFT and a pinhole-free coating
- Continuous Dry Temperature Resistance: 650°C
- Intermittent Temperature Resistance: 700°C
- Touch Dry at 25°C: Approximately 4 hours
- Hard Dry at 25°C: Approximately 16 hours
- Minimum Overcoating at 10°C: 8 hours
- Minimum Overcoating at 15°C: 6 hours
- Minimum Overcoating at 25°C: 4 hours
- Minimum Overcoating at 30°C: 2 hours
- Maximum Overcoating at 25°C: 48 hours
- Full Cure Requirement: Heat to 200°C for 60 minutes before service
- Recommended Steel Surface Profile: 25–50 µm
- Thinner: Solvent XL
- Thinning: 0–20%, depending on application
- Airless Spray Tip: 11–17 thou
- Minimum Airless Pressure: 170 bar / 2500 PSI
- Air Spray: Pressure or gravity feed
- Air Spray Fluid Tip: 1.1–1.6 mm
- Brush/Roller: Suitable, typically achieving 15–20 µm
- Equipment Cleaner: Lacquer Thinner
- Minimum Surface Temperature: 5°C
- Maximum Surface Temperature: 45°C
- Minimum Ambient Temperature: 5°C
- Maximum Ambient Temperature: 45°C
- Maximum Relative Humidity: 100%
- Pack Sizes: 1 L, 5 L and 20 L
- Shelf Life: Minimum 12 months at 25°C from date of manufacture, subject to inspection thereafter
Colours & Finishes
Red
Matt Finish
Yellow
Matt Finish
Blue
Matt Finish
Please Note: Colour swatches and illustrations displayed are only to be used as a guide and can vary from the original.
