Uses of Fire Retardant Paint

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Choosing the correct Intumescent Fire Paint (base) and Fire Retardant Paint (finish)

Next Day UK Delivery of all Fire Varnishes and Fire Paints - call 01626 331351. Colour Chart Click Here.


Click to Select Class 1 and Class 0 - Plasterboard - Timber - Steel - Varnish - Doors


Click to Select 30 Minutes - Plasterboard - Timber - Steel - Varnish - Doors


For 60 minutes - call us or us on 01626 331351 - we'll do the calculations for you.


Class 1 and O Protection - list of types of surface that you can paint

Always read our Data and Information Sheets before proceeding.

 

On Bare Single layer or Double layer Plasterboard

Apply one thinned coat of Flame Retardant Paint, mixed 50:50 with water to prime the bare surface and then two further coats of Flame Retardant Paint. No Intumescent Paint is required.

Allow 10 square metres per litre per coat - a 2.5 litre can will cover approximately 25 square metres per coat, about 10 square metres for the two and a half coat specification above.


On Painted Single or Double Plasterboard

Apply one coat of Wallcoat Intumescent Paint and either two coats of Flame Retardant Acrylic Eggshell Paint or one coat of Flame Retardant Vinyl Matt Paint.

Allow 7 square metres per kilo per coat for Wallcoat - a 1.9 litre/2.5kg can will cover approximately 13 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Paint - a 2.5 litre can will cover approximately 25 square metres per coat, about 12.5 square metres for the two coat specification above.


On sound Artex on Single or Double Plasterboard

Apply two coats of Flame Retardant Paint, Vinyl Matt or Acrylic Eggshell, as finish coats.

Allow 7 to 8 square metres per litre per coat for Flame Retardant Paint, depending on the roughness of the Artex - a 2.5 litre can will cover approximately 17 to 20 square metres per coat, about 9 square metres for the two coat specification above.


On Bare and Painted Timber Indoors

Carry out a water droplet or Emulsion Paint dab test - if a water droplet is absorbed or ordinary Emulsion Paint spreads and dries without 'marbling or cissing'. Then try a test patch with the proposed Intumescent Paint or Varnish. If it puddles, marbles or pools it will not set properly and the surfaces need more preparation. This problem is called 'cissing' and usually indicates that the surface is repelling the Paint or Varnish - it may be affected by wax, oil, natural resins in freshly planed timber, timber treatments, greasing hand prints. If 'cissing' occurs repeat the Preparation process and then call us for help.

Apply two coats of Timbercoat Intumescent Fire Paint and one coat of Flame Retardant Paint as a finish. (If you use Acrylic Eggshell or a poor coverage colour (like Yellow) you will need two coats).

Allow 7 square metres per litre per coat for Timbercoat Intumescent Fire Paint - a 1.9 litre/2.5kg can will cover approximately 13 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Paint when applying only one coat - a 2.5 litre can will cover approximately 25 square metres per coat.


On Outdoor Bare and Painted Timber

Carry out a water droplet or Emulsion Paint dab test - if a water droplet is absorbed or ordinary Emulsion Paint spreads and dries without 'marbling or cissing'. Then try a test patch with the proposed Intumescent Paint or Varnish. If it puddles, marbles or pools it will not set properly and the surfaces need more preparation. This problem is called 'cissing' and usually indicates that the surface is repelling the Paint or Varnish - it may be affected by wax, oil, natural resins in freshly planed timber, timber treatments, greasing hand prints. If 'cissing' occurs repeat the Preparation process and then call us for help.

Apply two coats of Timber Fire Paint and two coats of Flame Retardant Paint as a finish.

Allow 7 square metres per litre per coat for Timber Fire Paint - a 1.9 litre/2.5kg can will cover approximately 13 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Paint - a 2.5 litre can will cover approximately 25 square metres per coat, about 12.5 square metres for the two coat specification above.

Note - outdoor timber frequently requires 30 minutes or 60 minutes protection - check with your Council Building Inspector.


On Primed Steel Indoors

Apply one coat of Steel Intumescent Paint and one coat of Flame Retardant Paint (no Flame Retardant Paint top coat is required if steel is hidden from touch, but it is still recommended if the steel will be subject to dampness or high humidity, or be outdoors during erection).

Allow 5 square metres per kilo per coat for Steel Fire Paint - a 1.9 litre/2.5kg can will cover approximately 12.5 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Paint - a 2.5 litre can will cover approximately 25 square metres per coat.


Clear Coatings - Fire Varnish - two pack Base Intumescent Varnish, one pack top coat Fire Varnish

You can substitute clear Varnish for Paint, but bear in mind that the Varnish base coat is a two pack Epoxy with only 2 months shelf life.


Fire Varnish - Indoors

Carry out a water droplet or Emulsion Paint dab test - if a water droplet is absorbed or ordinary Emulsion Paint spreads and dries without 'marbling or cissing'. Then try a test patch with the proposed Intumescent Paint or Varnish. If it puddles, marbles or pools it will not set properly and the surfaces need more preparation. This problem is called 'cissing' and usually indicates that the surface is repelling the Paint or Varnish - it may be affected by wax, oil, natural resins in freshly planed timber, timber treatments, greasing hand prints. If 'cissing' occurs repeat the Preparation process and then call us for help.

Apply two coats of Fire Varnish Base Coat (Epoxy based, two pack) and one coat of Fire Varnish Top Coat (solvent based).

Allow 6.5 square metres per litre per coat for Fire Varnish Base Coat - a 3 litre can will cover approximately 20 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Varnish top coat - a 2 litre can will cover approximately 20 square metres per coat.


Fire Varnish - Outdoors (remember that outdoor application will require re-coating when weathered, as with any external finish).

Carry out a water droplet or Emulsion Paint dab test - if a water droplet is absorbed or ordinary Emulsion Paint spreads and dries without 'marbling or cissing'. Then try a test patch with the proposed Intumescent Paint or Varnish. If it puddles, marbles or pools it will not set properly and the surfaces need more preparation. This problem is called 'cissing' and usually indicates that the surface is repelling the Paint or Varnish - it may be affected by wax, oil, natural resins in freshly planed timber, timber treatments, greasing hand prints. If 'cissing' occurs repeat the Preparation process and then call us for help.

Apply two coats of Fire Varnish Base Coat (Epoxy based, two pack) and two coats of Fire Varnish Top Coat (solvent based).

Allow 6.5 square metres per litre per coat for Fire Varnish Base Coat - a 3 litre can will cover approximately 20 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Paint - a 2 litre can will cover approximately 20 square metres per coat, about 15 square metres for the two coat specification above.

Note - outdoor timber frequently requires 30 minute, or 60 minute protection - check with your Council Building Inspector.


30 Minutes Protection - list of types of surface that you can paint

Always read our Data and Information Sheets before proceeding.

 

On Bare, Painted or Artexed Single 3/8 inch or 9mm Plasterboard

Apply one thinned coat of Wallcoat Intumescent Paint mixed 50:50 with water to prime the bare surface and then two further coats of Wallcoat Intumescent Paint, followed by one coat of Flame Retardant Paint.

Allow up to 7 square metres per litre per coat for Wallcoat - a 1.9 litre/2.5kg can will cover approximately 13 square metres per coat, about 5 square metres for the two and a half coat specification above, subject to surface roughness.

Allow 7 - 8 square metres per litre per coat for Flame Retardant Paint - a 2.5 litre can will cover approximately 20 square metres per coat, subject to surface roughness.


On Bare, Painted or Artexed Single 1/2 inch or 12.5mm Plasterboard

Apply one thinned coat of Wallcoat Intumescent Paint mixed 50:50 with water to prime the bare surface and then one further coat of Wallcoat Intumescent Paint, followed by one coat of Flame Retardant Paint.

Allow up to 7 square metres per litre per coat for Wallcoat - a 2.5kg can will cover approximately 13 square metres per coat, about 5 square metres for the two coat specification above, subject to surface roughness.

Allow 7 - 8 square metres per litre per coat for Flame Retardant Paint - a 2.5 litre can will cover approximately 25 square metres per coat, subject to surface roughness.


On Bare or Painted Double Plasterboard - same as Class 1 and Class O

No further upgrade required beyond Class 1 and Class O in the section above: apply the same specification as above, repeated here.

Apply one coat of Wallcoat Intumescent Paint and one coat of Flame Retardant Paint.

Allow 7 square metres per litre per coat for Wallcoat - a 1.9 litre/2.5kg can will cover approximately 13 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Paint - a 2.5 litre can will cover approximately 25 square metres per coat.


On Bare and Painted Timber Indoors

Carry out a water droplet or Emulsion Paint dab test - if a water droplet is absorbed or ordinary Emulsion Paint spreads and dries without 'marbling or cissing'. Then try a test patch with the proposed Intumescent Paint or Varnish. If it puddles, marbles or pools it will not set properly and the surfaces need more preparation. This problem is called 'cissing' and usually indicates that the surface is repelling the Paint or Varnish - it may be affected by wax, oil, natural resins in freshly planed timber, timber treatments, greasing hand prints. If 'cissing' occurs repeat the Preparation process and then call us for help.

Apply three coats of Timber Intumescent Paint and one coat of Flame Retardant Paint as a top coat.

Allow 7 square metres per litre per coat for Timber Fire Paint - a 1.9 litre/2.5kg can will cover approximately 13 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Paint - a 2.5 litre can will cover approximately 25 square metres per coat.

SAFE MINIMUM THICKNESS OF WOOD - for 30 Minutes Protection Standard

A minimum of panel thickness of 10mm is required.


On Outdoor Bare and Painted Timber

Carry out a water droplet or Emulsion Paint dab test - if a water droplet is absorbed or ordinary Emulsion Paint spreads and dries without 'marbling or cissing'. Then try a test patch with the proposed Intumescent Paint or Varnish. If it puddles, marbles or pools it will not set properly and the surfaces need more preparation. This problem is called 'cissing' and usually indicates that the surface is repelling the Paint or Varnish - it may be affected by wax, oil, natural resins in freshly planed timber, timber treatments, greasing hand prints. If 'cissing' occurs repeat the Preparation process and then call us for help.

Apply three coats of Intumescent Timber Paint and two coats of Flame Retardant Paint as a finish.

Allow 7 square metres per litre per coat for Timber Fire Paint - a 1.9 litre/2.5kg can will cover approximately 13 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Paint - a 2.5 litre can will cover approximately 25 square metres per coat, about 12.5 square metres for the two coat specification above.

SAFE MINIMUM THICKNESS OF WOOD - for 30 Minute Fire Standard

A minimum of panel thickness of 10mm is required.


On Primed Steel Indoors - same as Class 1 and Class O above.

(We offer a High Build Steel Primer, if required) All surfaces must be rust free and primed before coating with Fire Paints, because they are water based and will otherwise cause 'flash' rusting.

Apply one coat of Steel Intumescent Paint and one coat of Flame Retardant Paint (no Flame Retardant Paint top coat is required if steel is hidden from touch, but it is still recommended if the steel will be subject to dampness or high humidity, or be outdoors during erection).

Allow 6.5 square metres per litre per coat for Steel Fire Paint - a 1.9 litre/2.5kg can will cover approximately 12.5 square metres per coat.

Allow 10 square metres per litre per coat for Flame Retardant Paint - a 2.5 litre can will cover approximately 25 square metres per coat.

Ask us for a FREE Steel Calculation for your particular steel beams - we can calculate the surface areas and the paint needed.


Clear Coatings - Fire Varnish - two pack Base Intumescent Varnish, one pack top coat Fire Varnish.

You can substitute clear Varnish for Paint, but bear in mind that the Varnish base coat is a two pack Epoxy.


Fire Varnish - Indoors

Carry out a water droplet or Emulsion Paint dab test - if a water droplet is absorbed or ordinary Emulsion Paint spreads and dries without 'marbling or cissing'. Then try a test patch with the proposed Intumescent Paint or Varnish. If it puddles, marbles or pools it will not set properly and the surfaces need more preparation. This problem is called 'cissing' and usually indicates that the surface is repelling the Paint or Varnish - it may be affected by wax, oil, natural resins in freshly planed timber, timber treatments, greasing hand prints. If 'cissing' occurs repeat the Preparation process and then call us for help.

Apply three coats of Fire Varnish Intumescent Base Coat (Epoxy, two pack) and one coat of Fire Varnish Top Coat (solvent based).

Allow 6 square metres per litre per coat for Fire Varnish Intumescent Base Coat - a 3 litre pack will cover approximately 20 square metres per coat, about 6 square metres for the three coat specification above.

Allow 10 square metres per litre per coat for Flame Retardant Varnish Finish - a 2 litre can will cover approximately 20 square metres per coat.

SAFE MINIMUM THICKNESS OF WOOD - for 30 Minute Fire Standard

A minimum of panel thickness of 10mm is required.


Fire Varnish - Outdoors (remember that outdoor application will require re-coating when weathered, as with any external finish).

Carry out a water droplet or Emulsion Paint dab test - if a water droplet is absorbed or ordinary Emulsion Paint spreads and dries without 'marbling or cissing'. Then try a test patch with the proposed Intumescent Paint or Varnish. If it puddles, marbles or pools it will not set properly and the surfaces need more preparation. This problem is called 'cissing' and usually indicates that the surface is repelling the Paint or Varnish - it may be affected by wax, oil, natural resins in freshly planed timber, timber treatments, greasing hand prints. If 'cissing' occurs repeat the Preparation process and then call us for help.

Apply three coats of Fire Varnish Intumescent Base Coat and two coats of Fire Varnish Top Coat.

Allow 6 square metres per litre per coat for Fire Varnish Base Coat - a 3 litre pack will cover approximately 20 square metres per coat, about 6 square metres for the two coat specification above.

Allow 10 square metres per litre per coat for Flame Retardant Varnish finish - a 2 litre can will cover approximately 20 square metres per coat, about 12 square metres for the two coat specification above.

SAFE MINIMUM THICKNESS OF WOOD - for 30 Minute Fire Standard

A minimum of panel thickness of 10mm is required.


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Site written by: David Moore

David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author

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