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Thermoguard THERMOCOAT
INTUMESCENT PAINT FOR STRUCTURAL STEEL AND CAST IRON

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INTENDED USE

Thermocoat is a water-based intumescent paint system providing fire resistance to structural steel and cast iron of up to 90 mins with a minimum number of coats.

A compatible decorative overcoat system ensures the system will enhance the building’s architectural and design features.

How it works

The heat of a fire triggers a catalytic reaction, causing the expansion of an insulating char layer up to 50 times the paint thickness.

This layer keeps the steel below its critical temperature, thus maintaining the structural integrity of the building.

intumescent paint protecting steel girder

FIRE TESTING

Product performance assessment is based upon UKAS/ NAMAS Fire Test Laboratory Certification to BS 476 Part 21 - Fire Resistance to load bearing elements of structures.

Please consult Technical Department 01142 768008 for detailed specification advice.

FIRE CERTIFICATIONintumescent steel

Thermoguard issue a Certificate of Supply on request for each specified project for insurance,Fire and Building Control Authority and Client Records.

Preparation and Pretreatment

Steel and cast iron should be free from rust and millscale and primed with Thermoguard High Build Metal Primer to 75 microns DFT (or alternative good quality anti-corrosive primer compatible with intumescent paints) in accordance with manufacturers instructions.

Treat Galvanised surfaces with "T" wash/Mordant solution and prime with zinc phosphate or other primer for steel.

Thermoguard High Build Metal Primer may be left without further overcoating or decorated with appropriate conventional paint where no fire resistance is required.

TO SPECIFY

  • Dry Internal.Apply Thermocoat W in accordance with Thermoguard film thickness schedule to achieve 30,60,90 mins.

  • Visable or occasional modest damp internal areas. Also apply 1 good coat of Thermoguard Flame retardant Paint.

  • Wet or External Under Cover. apply 2nd Coat of Thermoguard Flame retardant Paint.

  • Full external Exposure. contact technical dept.

             

Application

Thermocoat W may be applied by brush, roller or airless spray.

To achieve the best finish in the shortest time, spray application is recommended. Prior to application the contractor should contact Thermoguard's Technical Department and obtain a basecoat application schedule.

To assist correct application in accordance with this schedule, a wet film gauge will be supplied with the order. Further wet film gauges will be provided on request.

  • Maximum wet film thickness per brush coat – 800 microns

  • Maximum wet film thickness per spray coat – 1400 microns.

Recoating

Brush/roller application

  • Surface dry: minimum 2 hours

  • Recoat: minimum 4 hours

  • Overcoating with Flame Retardant finish: minimum 10 hours

Spray application

  • Surface Dry: minimum 4 hours

  • Recoat: minimum 10 hours

  • Overcoating with Flame Retardant finish: minimum 48 hours

SPRAY EQUIPMENT

Airless Spray Pump
Use equipment recommended by manufacturer for the application of high viscosity intumescent paints.

Filter size
30 mesh. 10mm hose 3/8 diameter with no whip end.

Tip Size
327-329 for narrow surfaces (6” fan)
427-429 for broad surfaces (8” fan)

Care should be taken to clean filters regularly.

Cleaning should be undertaken with water.

COMPOSITION

Intumescent compounds and resin binders, with high opacity pigments.

TECHNICAL, ADVISORY AND ESTIMATING SERVICE

Themoguard have in-house estimators who provide realistic, confidental guidance on project costings to contractors and quantity surveyors.They also provide expert advice and assistance with all aspects of specification and application.

QUALITY ASSURANCE

Themoguard is ISO 9000 registered. All products are manufactured and supplied under the principles of ISO 9000.

APPLICATION CONDITIONS

  • Maximum Relative Humidity 80%

  • Minimum ambient temperature 4°C

  • Minimum Steel Temperature 3°C above Dew Point

ENVIRONMENTAL, HEALTH & SAFETY

Thermoguard Thermocoat W is a low-odour, water-based coating, making it user and environmentally friendly. The range of topcoats are either water-based or 2010 compliant and safe to use in accordance with manufacturers instructions.

Illustrations of Structural Steel Terminology

Thermoguard, Kirkby Street, Hull, HU2 0HE

Tel: 01142 768008 | Fax: 01142 381966

All materials and specifications are provided in accordance with the Terms and Conditions of Thermoguard UK Ltd.

Refer to Health & Safety Data Sheets before using these products.
Updated 12/16

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