SILHEAT 250 Extra

A heat resistant modified alkyd resin based aluminum paint

SILHEAT 250 Extra – Heat Resistant modified alkyd resin based aluminum paint

Properties and Areas of Use

– Heat resistant up to 250C
– Good resistance to atmospheric exposure
– For best appearance spray application should be used.

Technical Coating Data @ 25 °C for mixed material

Finish                                                                             Metallic Sheen

Color Range                                                                   Silver

Solids Volume                                                                42 ± 2%

Dry Film Thickness Range                                          25-50 µm

Theoretical Spreading Rate                                        12 m² / L @ 35 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                                                                                   432 g/L

Film Thickness and Spreading Rate:     

                                                                                               Minimum                         Maximum                              Typical
Film thickness, dry (µm)                                                         25                                         50                                        35
Film Thickness, wet(µm)                                                         60                                        119                                       83
Theoretical Spreading Rate (m2/L)                                     16.8                                      8.4                                        12

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 (ISO8501-1:2007) 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 aminimum 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:

PRIMALKYD Fast                                          1 x 50 µ
SILHEAT 250 Extra                                       2 x 35 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 250 Extra – Heat Resistant


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