|
|
|
Common
problems: General
Problem
Blistering and flaking 
Bleeding
Cissing
Solution
 |
Blistering
and flaking
Cause
This may be due to any of the following factors:
- Moisture trapped beneath the surface of the paint film.
- If the paint is applied over a powdery or friable surface.
- Surface contamination such as dirt, oil, and grease.
- Polish residues on the surface, which impair the adhesion
of the paint.
- Excessive movement of the substrate, such as joints,
imposing stress on the paint film which can result in
cracking which in turn lets in moisture, ultimately resulting
in a flaking paint film.
- 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.
Putting it right
All loose material will have to be removed back to a firm edge,
spot primed with the appropriate Dulux Primer, and then recoated
with the appropriate product. If large areas are involved it
will be best to totally strip the surface back to a bare surface
and start again.
|
|
 |
Bleeding
Cause
This is usually caused by contamination of the underlying surface
by soluble stains.
Putting it right
It is important to seal the original stain by applying a coat
of Polycell Stain Stop prior to re-decorating.
|
|
 |
Cissing
Cause
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.
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.
|
|
 |
|
|
