Dulux 5092090 Primer & Undercoat Paint For Wood - 2.5L, White

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Intended for use with emulsion paints, water-based undercoats are vital in many cases for a smooth finish. Most of the options within the UK will also function as a primer, effectively offering protection for the underlying material and an adhesive surface for painting in a single coat. Acrylic Primer Undercoat This is caused usually by a wearing away of the paint film by weathering or could be evidence of salts coming out of the surface. Putting it right You will need to rub down using 'wet and dry' abrasive paper using water with a little detergent added. The surface should then be rinsed and allowed to dry before repainting. If this is impractical due to the size of area affected the area could be horizontally lined with lining paper and then repainted.

Using the wrong type of roller can cause foaming of a paint film. Sponge or foam rollers should be avoided with water-based paints. Long pile rollers must be wetted out properly. Foaming happens when air gets into the wet paint film to create air bubbles. When these bubbles burst craters are left on the film surface. Sometimes these craters dry to give an even film. Putting it right This is a common occurrence in new houses and is often the result of plaster drying out or movement of the building. Putting it rightWhen the surface is thoroughly dry the affected surface will need to be rubbed down using 'wet and dry' abrasive paper. It can then be re-coated. This should only be done once the conditions improve or when the condensation problem is resolved. This is caused by painting over contaminated surfaces such as wax, oil or polish. The paint cannot adhere to the surface and draws away leaving unpainted areas. This can also be caused by contamination on the brush. Putting it right Allow the surface to dry and then rub down using 'wet and dry' abrasive paper and a solution of warm water and detergent. Once rinsed and dried the area can be repainted. Resins present in knots causing light coloured paints to discolour or even flake. Resin bleed and flaking is a common problem where dark colours are used on south facing elevations. This is because dark colours absorb more heat than light colours.

Affected areas should be treated with Weathershield Multi-Surface Fungicidal Wash. Once rinsed and allowed to dry it can be over coated with your favourite Weathershield Masonry Paint. When the surface is thoroughly dry the affected surface will need to be rubbed down using 'wet and dry' abrasive paper. It can then be re-coated. The affected area should be brushed down with a stiff bristle brush to remove as much powdery material as possible before applying a coat of Weathershield Exterior Stabilising Primer. If the powder is due to salts/efflorescence then the surface should be wiped with a dry cloth to exhaust the salts before coating with Dulux Trade Alkali Resisting primer to eliminate staining. It can then be re-painted in your chosen finish. Oil-based undercoat paints are for use with oil-based finishing paints. While these paints were traditionally the choice of professionals, advances in water-based options mean that today many will use both, or have moved to water-based entirely. It’s worth keeping in mind that oil-based undercoat paints will release volatile organic compounds (VOCs) while drying, which can be dangerous. Ensuring adequate ventilation is crucial, with many opting to use water-based paints internally. Water-Based Undercoat

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Paint undercoat also protect your walls and surfaces and prepare them for the top coat, providing a neutral base for you to apply any colour, however bold it may be. Primer paint is essential if you're changing a colour scheme from a dark shade to something lighter, helping to show your topcoats true colour while keeping it vibrant for longer. It is important to seal the original stain by applying a coat of Polycell Stain Stop prior to re-decorating. This is usually caused by contamination of the underlying surface by soluble stains. Putting it right

Begin by laying down a dust sheet underneath the area that you will be working in, to prevent any primer or paint spillages from staining your floor. Then clean the surface you will be working on with soap and a sponge, removing any algae, mould or surface coating, and allow the area to dry. Tape up any metal hardware such as handles or doorknobs with masking tape prior to priming and painting, to prevent stains and paint splatters. This dead wood must be completely removed by rubbing it down to new sound wood. If outside, the wood can then be primed with Weathershield Exterior Preservative Primer followed by the Weathershield Undercoat& Gloss. Rotten wood Cause Loss of gloss is normally only noticed with high gloss paint & varnishes. It is caused by the settling of dew or condensation on the paint shortly after application. This is often a problem when painting out of season, or in areas of high condensation like bathrooms. Putting it right Make sure that all filled areas are rubbed down smooth and level. You will need to prime the filler before painting to prevent subsequent coats being absorbed more rapidly than on other areas. Use a coat of Dulux emulsion thinned 10-20% with clean water. Once this is dried you can apply a full coat of Dulux emulsion.There are a variety of undercoat options available in the UK, with water-based and oil-based choices, and others designed around specific surfaces. Almost all undercoats will include primers, meaning that they can fully prepare a surface for painting. Oil-Based Undercoat