CHALKING – CHALK RUN–DOWN:
 DESCRIPTION

The formation of fine, white powder on the surface of the paint film due to weathering, which may give the appearance of color f ading. Although some degree of chalking is normal and can be a desirable way for a paint film to wear, excessive film corrosion may result in heavy chalking.

POSSIBLE CAUSE

• Oil-based paints rend to chalk more than latex formulations.
• Use of a low-gr ade, highly pigmented paint.
• Factory- finished siding can develop an excessively thick chalk layer and may require power washing to ensure complete chalk removal.
• Use of an interior paint for an outdoor application.
• Not adequately sealing a porous surface.
• Over-thinning a coating.
• Spre ading the paint too thin.

SOLUTION

• Remove chalk by washing or power washing the surface with an appropriate cleaner. If some chalk remains after first washing, then wash again for complete removal; scrubbing may be necessary. Rinse well with clear water. Allow to dry thoroughly.
• Brick areas that are stained by “chalk run-down should be scrubbed with a stiff brush and detergent. Professional cleaning may be required to remove this staining.
• For the best resistance to chalking, use higher-quality acrylic coatings.

EXTERIOR

• Primer, if needed Loxon Conditioner, or A-100 Exterior Primer, or
• Loxon Masonry Primer or All Surface Enamel Primer
• Finish Refer to our Exterior Paint Rating chart to determine which
• product best fits your needs.
• Suggested Finishes Duration, Super Paint, A-100 WoodScapes.