BRUSHING SEEDLAC
When brushing with Seedlac temperature and humidity are very important factors. All surfaces should be absolutely dry,
and the humidity in the workshop below 70%.
For a wash-coat use thinned Seedlac (50% thinners), the second coat should be with 25% thinners, and the top- coat with undiluted Seedlac.
Note : The first coat is termed the wash-coat. It sets any fibres raised by the sanding operation, seals the wood and prevents any creeping through of its resinous content. It also gives increased resistance to wear.
SPRAYING SEEDLAC
The recommended consistency for brush application also applies to spraying. The best results can be obtained by spraying
Seedlac in a fan pattern, holding the gun approximately 6 inches or 150 mm from the work surface.
The gun should be kept in constant motion to prevent piling up of material. The edges should not overlap too much and the surface must be completely covered.
The operator should work rhythmically with a minimum of waste motion and over spray, always maintaining an even air pressure. The technique of spraying has to be acquired after careful experiment under local conditions.
Generally the pressure at the gun for the different coats varies. When applying a wash-coat try 25psi (175kPa), and for sealer and top-coat 30-35psi (200-240kPa).
Spraying of Seedlac should never be attempted when the relative humidity is over 85% or temperature is under 18 degrees C.- 25 degrees C @ 60%-80% humidity is ideal.
SEEDLAC GENERAL DATA
Solvent release product. Apply 2 full coats wet on wet or several thin coats, about 12 minutes apart to gradually obtain
a film build up of approx. 0.3mm. Spray at 30psi (200kPa). Dust Free from 5-10 minutes Tack Free from 20-30 minutes Print
Free from 1 hour - N.B. pressure will cause finish to move or mark. (depends on thickness of coat and prevailing conditions)
Sanding after 3-4 hours-depending on the conditions and the thickness of the coat. (Wet and dry with turps or Red Oil as
lubricant)
Limitations interior use only.