Wet abrasion resistance

Wet abrasion resistance indicates the level of durability and cleanability of wall paints in the dry state.  Moreover, it is a measurement for mechanical abrasion.

Wet abrasion resistance is defined in DIN EN 13 300 and divided into 5 classes. Class 1 represents the highest degree of wet abrasion, class 5 the lowest degree of wet abrasion resistance. Classes are allocated by standard testing:  the lower the level of colour loss, the more durable the tested coating is.

 

 

Classification according to standard testing

Class 1

 < 5 μm abrasion with 200 abrasion cycles

Class 2

 ≥ 5 μm and < 20 μm with 200 abrasion cycles

Class 3

 ≥ 20 μm and < 70 μm with 200 abrasion cycles

Class 4

 < 70 μm abrasion with 40 abrasion cycles

Class 5

 ≥ 70 μm with 40 abrasion cycles

 

Cleanability according to wet abrasion resistance

testing device for assessment of wet abrasion
In principle this rule applies:

For a normal, private living area a colour with wet abrasion class 3 is sufficiently suitable. For areas with heavy usage such as corridors one should apply colours that have wet abrasion class 1 or at least 2.

Wet abrasion class 1 (highly abrasion proof)

Suitable for cleaning with water and natural brush if neutral or hygienic cleaner is added. Applicable for extremely burdened indoor areas such as entrance halls, kitchens, staircases or public buildings.

Wet abrasion class 2 (scrubbable as per DIN 53778)

Suitable for cleaning with water and natural brush if neutral cleaner is added.  Applicable for ceilings and walls with heavy usage such as children's and bath rooms.

Wet abrasion class 3 (wash-resistant as per DIN 53778)

Suitable for cleaning with water and natural brush or cloth if neutral cleaner is added. Applicable for ceilings and walls with normal usage such as living rooms.