Laminin Coatings Laminin Coatings

Problem Solver

Tips and advice for common paint problems.

problem-solver_Blisters

Blisters
Blisters or bubbles in dry film.

Remedy:
Remove loose and flaking paint. Allow to dry until moisture content is below 15%. Apply a deep penetrating plaster primer DampCure / PlasterPrime / WallPrime to stabilize surface before repainting.

Prevention / Tips:
Do not paint over substrates with a moisture content above 15%. Avoid painting in moist conditions or in direct sunlight as this may result in solvent entrapment / heat blisters.

problem-solver_Cratering

Cratering
Pinholes on dry film.

Remedy:
Sand to a uniform, smooth and stable surface. Repaint entire surface (corner to corner).

Prevention / Tips:
Adhere to specified spreading rate and drying time of coating. Do not apply coating too thick or wet on wet. Avoid painting over substrates with a surface temperature below 5°C.

problem-solver_Efflorescence

Efflorescence
Entrapped moisture or ingress lead to elevated alkaline levels.
Efflorescence residue will be visible on the surface of the paint coating.
This is commonly mistaken as pigment fading due to UV exposure.

Remedy:
High pressure wash to remove efflorescence, loose and flaking paint. Allow to dry until moisture content is below 15%. Apply a deep penetrating plaster primer DampCure / PlasterPrime / WallPrime to stabilise surface before repainting.

Prevention / Tips:
Do not paint over uncured cementitious substrates. Allow newly plastered surfaces to cure until moisture content is below 15%

problem-solver_Fading

Fading
Bright yellow, orange and red pigments tend to fade sooner compared to oxides.
UV exposure attacks the pigment structure leading to a loss of colour i.e. yellow to pink.

Remedy:
Insist on light fast pigments when repainting

Prevention / Tips:
Be cautious when selecting colours for exterior use. Insist on light fast pigments

problem-solver_Imperfections

Imperfections
Non uniform marks on prepared and finished substrates.

Remedy:
Sand to a uniform, smooth and stable surface. Spot prime filled areas with PlasterSeal / PlasterPrime / WallPrime / DampCure Repaint entire surface (corner to corner).

Prevention / Tips:
If a smooth uniform finish is required, skim entire surface with Kwartz Skim. Sheen paints are prone to highlight surface imperfections.

problem-solver_Parapets

Parapets
Early weathering on parapets.

Remedy:
High pressure wash to remove loose and flaking paint. Allow to dry until moisture content is below 15%. Seal parapets with HydroFlex in a criss-cross pattern. Allow at least 1cm overlap to wall area.

Prevention / Tips:
Always seal parapets before application of topcoat to prevent early weathering.

problem-solver_Picture-Framing

Picture framing
A non-uniform appearance may occour when a wall is painted with a roller and the edges are cut in with a brush.

Remedy:
Sand dry film lightly before re-application.

Prevention / Tips:
Cut in before roller application. Roller application into cut in before paint dries to create a uniform film.

problem-solver_PoorOpacity

Poor Opacity
Uneven obliteration.

Remedy:
If painting over an existing bright or dark colour, apply a barrier coat i.e. Universal UnderCoat or MaxiCoat (for acrylic systems only) over previously painted stable surfaces.
When painting with bright colours, apply a tinted basecoat with a compatible hue. For more expert advice, please contact your nearest Laminin dealer.

Prevention / Tips:
Adhere to specified spreading rate to achieve obliteration. When painting with bright colours, apply a tinted basecoat with a compatible hue. For more expert advice, please contact your nearest Laminin dealer.

problem-solver_RisingDamp

Rising Damp
Damp usually does not rise higher than 1.2m from ground level.
See efflorescence or blisters.

Remedy:
High pressure wash to remove efflorescence, loose and flaking paint. Allow to dry until moisture content is below 15%. Apply a deep penetrating plaster primer DampCure / PlasterPrime / WallPrime to stabilise surface before repainting.

Prevention / Tips:
Water should flow away from the structure. Keep ground levels in mind when landscaping.

problem-solver_Rust

Rust or Flaking Paint
Mild and galvanized steel.

Remedy:
Mild steel: remove rust, loose and flaking paint. Spot prime with a rust converter where rust cannot be completely removed, apply HydroEtch rust resistant primer on all bare areas before repainting.

Galvanized steel: remove rust, loose and flaking paint. Apply HydroEtch rust resistant primer on all bare areas before repainting. If rust cannot be removed completely it is suggested to replace galvanized sheet.

Prevention / Tips:
Do not paint over rusted surfaces or in moist or humid conditions. Wash with an appropriate degreaser or galvanized iron cleaner and rinse thoroughly with clean water. Apply HydroEtch primer over a clean, dry and stabile surface before application of topcoat.

problem-solver_SnailTrail

Snail Trails
Streak marks on newly painted surface.

Remedy:
Sand to a uniform stable surface. Spot prime streak marks with topcoat, repaint entire surface (corner to corner).

Prevention / Tips:
Avoid painting in moist / humid conditions. To allow applied paint to cure, there should be no rain forecast for at least 7 days.

problem-solver_StainMarks

Stain marks
Yellow / brown or black stains.

Remedy:
Water stains: allow to dry and apply AllPrime stain-locking primer.

Mildew / algae: wash affected areas with anti-fungal solution, rinse well with clean water, allow to dry and apply AllPrime stain-locking primer.

Prevention / Tips:
When painting in areas with high humidity or moisture like coastal regions or bathrooms and kitchens, use coatings with anti-fungal and bacterial resistant properties i.e. SunShield, Roof, KladAll, AlUre, EnviroSilk®, HydroShell or TruVelet®.

problem-solver_StruturalCrack

Structural Cracks
Surface cracks due to settlement or movement of structure.

Remedy:
Open cracks, remove efflorescence, loose and flaking paint. Allow to dry until moisture content is below 15%, apply DampCure / PlasterPrime / WallPrime / PlasterSeal to stabilise surface. Fill cracks with Kwartz Fill, spot prime with mentioned primers before repainting.

Prevention / Tips:
Cracks can lead to paint failure. If problem persists after remedy, consult an engineer.

problem-solver_TileRoof

Tile Roof
Flaking paint from tile roofs.

Remedy:
High pressure wash to remove loose and flaking paint. Allow to dry until moisture content is below 15%. Apply BondAll Acrylic until a stable surface has been achieved. Apply 2 coats Skin / Roof / SunShield.

Prevention / Tips:
Due to loose particles, porosity and disintegration, surfaces need to be stabilized with a deep penetrating acrylic bonding agent.

problem-solver_TouchUp

Touch-up
Colour variation due to touch-up.

Remedy:
Sand to a uniform stable surface. Spot prime streak marks with topcoat, repaint entire surface (corner to corner).

Prevention / Tips:
It is not recommended to do touch-ups, especially with sheen paints.

LAMININ COATINGS (PTY) LTD
13 MONUMENT ROAD
ORANJESIG
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