Crown two pack polyurethane varnish

Do not use for overcoating single-pack varnished surfaces unless all varnish coatings have been removed.

Characteristics: A two-pack material based on polyurethane resin and special hardeners.

Advantages: Hard, high gloss clear finish. Maintains natural beauty of the timber. Very good chemical and abrasion resistance. Excellent adhesion and flexibility.

Finish: High gloss. (Can also be supplied in eggshell & matt finish).

Application: Apply by brush or spray. For spray application masks should be worn.

Thinning & Mixing: Supplied in two-pack form, the two components should be mixed together thoroughly and allowed to stand for 15 – 20 minutes before application. To ease brushing and particularly for first coat work on porous timber, thin with 2Pack Polyurethane Thinner. For spray application thin to spraying viscosity.

Due to the limited pot life of the mixed material, care should be taken to avoid mixing more material than can be used within the working day. Where less than 4 litres of material are required, the base and catalyst should be mixed strictly in accordance with the mixing ratios mentioned on the container.

Drying Times: Surface dry: 2 hours, re-coatable: 14 hours. Attains maximum hardness after approximately 7 days of application.

Spreading Capacity: 11 – 12 m²/l when applied to normal smooth surfaces.

Colour: Clear.

Chemical resistance: Resistant to chemical fumes and splashes.

Equipment Cleaner: Crown Two-Pack Polyurethane Thinners.

Pack Sizes: 4 litres (combined base and catalyst) and 1 litre

SPECIFICATIONS:

New and Bare Woodwork: Prepare surface (refer surface preparation Data sheet SP 4). Apply 2 or 3 coats of Crown Two-pack Polyurethane Clear Varnish. The first coat must be thinned up to 20% to ease brushing and to allow good penetration of the timber. Subsequent coats can be thinned as necessary. (Refer notes below).

Previously Varnished woodwork: Remove all previous Varnish coatings using Crown Paint and Varnish Remover. On previously varnished floors the use of mechanical sanding equipment is recommended.

Notes:

1. When coating new and sanded parquet wood block floors, ensure that all surface dust and contamination is completely removed prior to coating. It is recommended that dust from the floor surface and between the timber joints should be removed a few minutes before coating using a cloth dipped in the two-pack thinners.

2. To obtain a smooth finish, each coat must be rubbed down with fine sandpaper, or preferably fine waterproof abrasive paper. Wipe clean before overcoating.

3. In order to obtain a smooth high gloss finish, the application of several thin coats is recommended. Do not apply too thickly and avoid over brushing.

4. Do not apply Crown two-pack polyurethane over floors that have been wax polished unless all trace of polish is removed using solvent following which the timber must be thoroughly sanded down. Failure to remove all polish will prevent the varnish from drying and a patchy appearance will result.

5. Ensure the woodwork is completely dry as moisture will react with the varnish and produce a milky appearance and may cause bubbling and blistering. Crown two-pack polyurethane must not be applied to floors if there is a danger of rising damp (especially in old buildings which have no damp-proof course) or on timber laid on a floor screed, which still contains moisture, as the coating will prevent the floor from breathing and may cause the timber to lift.