Resistance to condensation according to ISO 6270-1

Determination of the resistance of paint films and coating systems to condensation according to ISO 6270-1. The method is applicable to coatings on both porous substrates (wood, plaster, plasterboard) and non-porous substrates (metal) and provides an indication of performance under severe exposure conditions where continuous condensation occurs on the coating surface.

Test specimens are exposed to a condensation-water atmosphere for 240 hours. Following exposure, specimens are rinsed with tap water and lightly dried with paper towels before assessment. Coating condition is evaluated according to ISO 4628-1 (general principles and rating schemes) and ISO 4628-5 (assessment of degree of flaking), covering defects such as blistering, rusting, cracking, flaking, and delamination.

A photographic report is provided documenting the condition of specimens at each of the following stages:

  • Before exposure

  • After chamber exposure

  • After rinsing with tap water

  • After light drying with paper towels

Results are expressed using the ISO 4628 designation scheme. The test does not yield lifetime prediction data and is not intended to simulate specific outdoor environments; results are best used for comparative ranking of coating systems or compliance with specified requirements.

Suitable sample matrices
Paints and coatings
Required sample quantity
1 coated panel, dimensions 150 x 160 x 1 mm
Available quality systems
Accredited test method
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