Special Finishes

Architectural and Decorative Coating Specialists

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Thermalcoat is a single pack catalysed elastomeric polymer incorporating hollow thick-walled thermal beads.  Thermalcoat has been developed from outstanding technology.  THis unique coating provides a permanent elastomeric flexible membrane coating designed to provide exceptional thermal and insulation properties on all types of substrates including; roofs, factories, galvanised iron, aluminium, steel, fibreglass, etc.


  • 1mm filmbuild provides R Factor of 2.5
  • 2 mm filmbuild provides R Factor of 3.4
  • Acoustic control
  • Prevents condensation
  • Sound proofing vehicles, boats, caravans
  • All B.S. or designer colours
  • Airconditioning cost lower


All industrial and commercial areas that require thermal and condensation control.  Thermalcoat Elastomeric Flexible Membrane has been developed for the long term insulation protection and weatherproofing of concrete buildings, hotels, shopping complexes, schools, hospitals, bungalows, housing, commercial buildings, galvanised iron roofs, steel, iron, bridges, waterproofing concrete, block buildings, storage tanks, freezing works, oil refineries, breweries, marine, automotive, cars, boats, caravans, aluminium, etc.

Physical Properties:

Form Acrylic Catalysed Polymer Thermal Beads
Flexibility Elastomeric


Laboratory Trials - Thermalcoat Insulated Coating:

A number of tests were carried out by our laboratory;

Test No.1 Standard 2 Chamber heat transfer apparatus
Results: Ambient in laboratory 25.6°C
Thermalcoat coated top chamber 26.7°C
Bottom chamber (heat source) 52.2°C
Test No.2 Standard 2 chamber heat transfer apparatus 24 hour run heat input 40 watts
Results Chamber (a) as for Test No.1 - thermalcoat @ 600 microns thickness
Chamber (b) lined with insulating batts (R2.5)
Variations above ambients:
Chamber (a) 1.1°C to 1.6°C
Chamber (b) 2.0°C to 3.9°C


The summary of these tests showed that the Thermalcoat coating @ 600 microns had better insulation by 1°C to 2°C than the insulation batts.

Application to Steel, Fibreglass, Aluminium:


Apply 1 coat of Tetracure P10 Primer @ 8-10m² per litre coverage (diluted 50% with Tetrasolve Solvent).  Allow Tetracure P10 or Tetraprime WB 30 minutes to cure.

Apply 2 coats of Thermalcoat @ 650 microns wet filmbuild per coat.  Use as supplied and apply using hopper gun system overlapping each spray pass by 50% to achieve desired film thickness.  For thermal insulation a minimum of 1mm dry film thickness should be achieved.

For no-ferrous substrate Tetraprime WB, waterbased acrylic primer can be used.

Coverage: 1.5m² per litre @ 650 microns W.F.B. per coat
Dry Film Thickness: 500 microns per coat, 1mm total dry film thickness.
Dry Time: Touch - 60 minutes, Hard - 8-24 hours
Recoat: 4-8 hours, depending on ambient temperature.
Application: Trowel, Brush, roller, pressure pot system, or airless spray - remove all in-line filters, use 26-28 thou tip, Hopper Gun.  (Hopper Gun is preferred method)
Clean Up: Water or Brush Clean Solvent when dry
Thinning: Thin with minimal amounts of water.  Excessive thinning will cause sagging and slow dry
Drying Times: Thermalcoat Elastomeric Flexible Membrane will dry and can be recoated after 2 hours at 20°C In cold or humid conditions, allow 8 hours before application of second coat.
Number of Coats: Always apply 2 coats.  Plywood roof systems, 4 coats recommended with fibre mesh embedded.
Priming / Sealing: Use correct Sealers on concrete and fibrecement.  Tetracure P10 Primers to be used on galvanised iron steel and bridge structures, etc.  Always refer to prepartion specification sheets before any application.
Preparation: New and old concrete must be waterblasted and then Acid Etched.  Apply appropriate Sealer.  for steel, rust to be wire-brushed, then converted with Metaltech Rust Converter, then apply 2 coats of Tetracure P10 Primers.  Galvanised Iron to be cleaned with Chemocide Etch to remove oxidation, then primed wth Tetracure P10
Packaging: 4 litre, 10 litre, 20 litre plastic pails


Warranty / Liability

Special Finishes (NZ) Ltd provides all the enclosed information in good faith but without warrantee and is to assist your application. However the use of this product being used is beyond their control. The manufacturers can accept no responsibility whatsoever for any damage or failure arising from its application or use. It is totally the responsibility of the user to insure that the product is suitable for its intended use.