Sherwin-Williams Pyroplast Wood T Primer is a pre-treatment agent for use with Pyroplast Wood T, an ecological water-based fire protection coating for interior use which forms a carbon char under the effect of heat.

The product is tested to provide spread-of-flame protection and delays the inflammation of natural wood and wood derivates. Pyroplast Wood T emphasizes the interior design of timber structures and provides an attractive option to architects, builders and end-users.

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• Features & Benefits
• Product Information
• System Information
• Application Information
• Ecology, Health & Safety
• Application Instructions

Features & Benefits

• Reduces the ignitability of soft and hardwood ≥ 10 mm thickness and other timber derivatives, i. e. plywood, chipboard, fibre insulation board, hardboard and also on veneers ≥ 13 mm thickness
• Insulates against heat, checks fire, prevents propagation of fire and spread of flame and diminishes fluegas temperature
• Ecological and efficient water based coating
• VOC Pyroplast Wood T < 40 g/l
• Free of aromatic solvents
• Low material consumption
• Simple application
• No additional statical load of coating

Product Information

System Information

• Tie coat (depending on wood surface): Pyroplast Wood T Primer
• Intumescent coating: Pyroplast Wood T
• Topcoat (mandatory): Pyroplast Wood Top T

Application Information

Ecology, Health & Safety

User must read the most recent corresponding Safety Data Sheets (SDS) before using any products. The SDS provides information and advice on the safe handling, storage and disposal of chemical products and contains physical, ecological, toxicological and other safety-related data.

Application Instructions

Substrate Preparation:

Substrate must be dry, free from dust, oil, wax, grease, dirt, resin, etc.; Existing coatings with poor adhesion have to be completely removed, i.e. with solvent-based paint stripper or to be sanded down.

Surfaces that have been treated with non-acid resistant coatings or release agents such as emulsion paints containing lime, chalk or lithopone should be rubbed down completely. Timber substrates with wetting difficulties should be roughened thoroughly with 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. The moisture content of the timber should be below 15 %. Pyroplast Wood T Primer may be used to allow sufficient adhesion or avoid diffusion of wood ingridients on resinous wood.

Mixing:

Stir thoroughly, free of lumps.

Application:

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 spray. In case of application by roller or brush, additional layers may become necessary to achieve the required coating thickness, depending on 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 ⅜ "
• Whipline ¼ " may be used
• Recommended nozzle sizes: Pyroplast Wood T: 0.28 - 0.38 mm (0.011 - 0.015 inch)
• Solvent resistant hoses must be used for Pyroplast Wood Top T

Apply two coats of Pyroplast Wood T to a 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 recommend (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 undiluted
• 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

Cleaning of Equipment:

Pyroplast Wood T Primer and Pyroplast Wood T - Immediately after use with warm water.

Pyroplast Wood Top T - Immediately after use with Unitherm Thinner.

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.