A heat resistant silicone resin based aluminum paint

SILHEAT 400 – Heat Resistant A heat resistant silicone resin based aluminum paint

Properties and Areas of Use

– Heat resistant up to 400°C
-Good resistance to atmospheric exposure
-For best performance a temperature of 200°C after application for 60 minutes is recommended, to obtain sufficient cure
– For best appearance spray application should be used.

Technical Coating Data @ 25 °C for mixed material

Finish                                                                                 Metallic Sheen

Color Range                                                                      Silver

Solids Volume                                                                   27 ± 2%

Dry Film Thickness Range                                            25-35 µm

Theoretical Spreading Rate                                           9 m² / L @ 30 microns DFT (loss factors will apply in practice)
Surface Dry                                                                       30 min.

Recoat Interval                                                               16 hours minimum  –  7 days maximum
Complete Cure                                                                24 hours
Pot Life                                                                              N/A (Single Pack)
Flash Point                                                                       26°C
Shelf Life                                                                          12 months minimum.
Mixing Ratio by Weight                                                N/A (Single Pack)

VOC                                                                                    600 g/L

Film Thickness and Spreading Rate:         

                       Minimum                                           Maximum                                          Typical
Film thickness, dry (µm)                                                                25                                                       35                                                       30
Film Thickness, wet(µm )                                                               93                                                       130                                                     111
Theoretical Spreading Rate (m2/L)                                            10.8                                                      7.7                                                       9

Suitable Surfaces

 Steel and non ferrous metals properly prepared and blast cleaned to ISO-Sa2½
 Concrete free of contamination, dust and efflorescence, and properly prepared

Bare Steel:

Cleanliness: Blast – cleaning to Sa2 1/2 (ISO-8501-1:2007). Power tool cleaning to min. St2 (ISO 8501-1:2007) may be acceptable, subject to exposure conditions.

Shopprimed Steel:

Clean, dry and undamaged approved shopprimer

Coated Surfaces:

Clean, dry and undamaged compatible primer .

Other Surfaces:

For aluminium substrates , thorough washing and sweeping with a nonmetallic blast medium is required.

Application Conditions

Substrate temperature should be 10°C or above for application and during cure and a minimum of 3°C above the dew point. Adequate dry air ventilation is recommended for optimum drying.

Application Information

Thinning should only take place after the two components have been thoroughly mixed.

Brush and Roller

Thin if required with 0-5% Paint Thinner Colorama TH921.

Conventional Air Spraying

– Thin with 5-25% Paint Thinner Colorama TH921, as required.
-Tip size – 2.0 mm
-Tip pressure – 60 psi (0.4Mpa) approximately

Airless Spraying

-Thin with 0-20% Paint Thinner Colorama TH921, as required
-Tip size – 0.58-.79 mm approximately
-Tip pressure – 2100 psi (15Mpa) approximately

Cleaning Thinner

Equipment should be cleaned immediately after use with Paint Thinner Colorama TH921.

Drying time:

Drying times are affected by air ventilation, temperature, film thickness and number of coats.
Substrate Temp.                                                     10° C                                             25° C                                             40° C
Surface Dry                                                               1 h                                              30 min                                           15 min
Through Dry                                                             16                                                   8                                                      6
Dry to recoat, minimum                                        24                                                   16                                                    12
The given data serve as guideline only. The actual drying time differs according to film thickness, ventilation, humidity and underlying paint system.

Typical paint system:

SILPROTECT                                                                   1 x 75 µ
SILHEAT 400                                                                   2 x 30 µ


Keep the containers in a dry, cool, well ventilated space and away from source of heat and ignition. Containers must be kept tightly closed.


Handle with care. Stir well before use.

Packing Size:                             5 L & 18 L

Summary Safety Information

-Avoid inhalation of spray mist and skin contact by the use of masks, gloves and other personal protection. Eyes should be cautiously washed with water or proprietary wash, and medical attention obtained. Skin should be thoroughly washed using a cleanser and soap and water.
– Product is flammable
– No sparks or flames
– No smoking

SILHEAT 400 – Heat Resistant


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