Pyroplast Clear Intumescent  – Wood T

PRODUCT DESCRIPTION

Pyroplast Wood T is a transparent intumescent water borne, transparent fire protection coating which forms a carbon char under the effect of heat.

Pyroplast Wood T requires the Pyroplast Clear Top Coat to be used over the top to protect it.

Coverage = 14.3m2 per 5kg (This allows for 2 coats)

Pyroplast’s clear intumescent provides spread-of-flame protection and delays the combustion of internal natural wood derivates.

This intumescent varnish emphasizes the interior design of timber structures and therefore is an attractive option to architects, builders and end-users.

Please note, this product may appear to be white in the tin, however it dries clear when applied under the correct conditions.

USES

Reduction of ignitability of soft and hardwood ≥ 10 mm thickness and other timber derivatives, such as plywood, chipboard, fibre insulation board, hardboard and also on veneers ≥ 13 mm thickness. Pyroplast insulates against heat, checks fire, prevents propagation of fire and spread of flame and diminishes flue-gas temperatures.

Do not use Pyroplast Clear Intumescent in areas of high humidity, heat sources or on surfaces where significant physical impact is likely such as floors, stairs etc.

PROPERTIES

The Pyroplast Clear Intumescent Varnish has the following properties:

• Water based coating system
• VOC: approx. 40 g/l
• Free of aromatic solvents
• Low material consumption
• Simple application
• No additional statical load of coating

TESTS

Approval / Standards:

Pyroplast Wood T is thoroughly tested to ensure that the coating performs in all conditions and has been successfully tested and classified to many standards worldwide including EN 13501-1 and BS 476 part 6/7.

PRODUCT DATA

Colour Shades:

Pyroplast Wood T: transparent

Pyroplast Wood Top T: transparent (matt)

Packaging:

Pyroplast Wood T: 5 kg and 25 kg, net weight

Pyroplast Wood Top T: 2.5 kg and 10 kg, net weight

Imdg-Code-No   Not applicable

SHELF LIFE   18 months, in cool and dry storage conditions and original unopened containers.

Expiry date is noted on the label of each tin.

Protect against frost!

SYSTEMS

Coating Systems:

Tie coat (if necessary), Pyroplast Wood T Primer

Intumescent coating, Pyroplast Wood T

Finish Sealer, Pyroplast Wood Top T

Surface Preparation:

Substrate must be dry and clean, free from dust, oil, wax, grease, dirt, resin, etc; Existing coatings with poor adhesion have to be completely removed. We recommend using a solvent-based paint stripper or a sanding belt. Completely rub down surfaces that have been treated with non-acid resistant coatings or release agents such as emulsion paints containing lime, chalk or lithopone. Thoroughly roughen timber substrates with wetting difficulties using abrasive paper.

The moisture content of the timber should be below 15%.

Pre-Treatment with Wood Preservatives:

If resistance to wet rot, fungi or insect attack is requested, we recommend using commercial preservative agents based on oil alkyd resins provided they are compatible with the Pyroplast fire protection system. Apply Pyroplast fire protection coating system only after the preservative treatment is completely dry.

TECHNICAL DATA

Mass Density:

Pyroplast Wood T transparent:  approx. 1.33 g/cm3 at +20° C

Pyroplast Wood Top T:  approx. 0.98 g/cm3 at +20° C

Solids By Weight:

Pyroplast Wood T:  approx. 63% (according to EN ISO 3251)

Pyroplast Wood Top T:  approx. 50% (according to EN ISO 3251)

Flash Point:

Pyroplast Wood T: not applicable

Pyroplast Wood Top T:  approx. +61°C

Material Consumption:

• 1 x60g/m2 Pyroplast Wood T Primer (if necessary)
• 1 x300g/m2 Pyroplast Wood T (Wood class D > 13 mm) or
• 1 x350g/m2 Pyroplast Wood T  (Wood class D > 10 – 13 mm) plus
• 1 x50g/m2 Pyroplast Wood Top T

Consumption rates are based on fire performance according EN 13501-1

B   EN 13823 FIGRA ≤ 120 W/s and LFS  < edge of specimen and THR600s ≤ 7,5 MJ

and

EN ISO 11925-2 Exposure = 30s Fs < 150mm within 60 s

s1   SMOGRA ≤ 30 m2 / s2 und TSP 600s ≤ 50 m2

d0 No flaming droplets/particles in EN 13823 with 600 sj;

APPLICATION – how do you apply Pyroplast Clear Intumescent?

Preparation of Material:

Stir the intumescent varnish thoroughly, free of lumps.

The method of application has a major effect on achieving uniform thickness and appearance. Spray application will give the best results. The indicated dry film thickness is easily achieved by airless spraying. When applying the products by roller or brush, additional layers may be needed to achieve the required coating thickness. This depends on the type of construction, site conditions, colour shade etc. Prior to application, a trial on site may be useful to ensure that the selected application method will provide the requested results.

Airless Spraying:

• Material shall be applied undiluted
• Airless spray equipment with pressure ratio ≥ 30:1
• Filters should be removed
• Hose diameter not below 3/8 “
• Whipline ¼ ” may be used
• Recommended nozzle size for Pyroplast Wood T:
• 0.028 – 038 mm or 0.011 – 0.015 inch
• Recommended nozzle size for Pyroplast Wood Top T:
• 0.028 – 0.38 mm or 0.011 – 0.015 inch
• Solvent resistant hoses must be used

Apply two coats of Pyroplast Clear Intumescent to load of 175 g/m2 each coat, in order to obtain a very smooth finish by cutting down wooden fibres. Light sanding after the first coat may be recommended (i.e. with 150 grade paper).

Above data shall be used as a guideline with variations being made to suit local conditions.

 Brushing and Rolling:

• Material shall be applied in supply viscosity
• Load natural fine bristle brushes or short pile lambswool rollers are recommended
• Application of two coats of Pyroplast Wood T to a load of 175  g/m2 each coat is recommended

 Application Conditions:

Pyroplast Wood T Primer, Pyroplast Wood T and

Pyroplast Wood Top T:

Object temperature shall be at least ≥ 3 K above dew point

In case relative humidity exceeds 80% special measures must be taken to prevent the condensation forming while application.

At high moisture content of the timber (>15%), the coating is unlikely to dry satisfactory.

Not suitable for use on all woods. Please contact us for more details.