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Synergistic Light Stabilizer Mixture for Waterborne Coatings

Hostavin® 3225-2 DISP

Hostavin 3225-2 DISP is a 52% aqueous dispersion of a halogenated benzotriazole UV absorber combined with a low molecular weight HALS, designed for UV stabilization of paints and clearcoats.


Hostavin 3225-2 DISP is an easy to use dispersion requiring no milling or dissolving before use and can be incorporated at any stage of the paint production.
Hostavin 3225-2 DISP has been primarily developed for exterior waterborne wood coatings protection, due to its broad UV absorption profile, which is a key requirement for clearcoat systems.


Classification according CLP regulation (Regulation (EC) No. 1272/2008, as amended).
    Serious eye damage, Cat. 1
    Specific target organ toxicity - repeated exposure, Cat. 2
    Long-term (chronic) aquatic hazard, Cat. 2
For further information please refer to the Material Safety Data Sheet.

Chemical Composition

Chemical Nature: 2-(5-chloro-2H-benzotriazol-2yl)-6-(1,1dimethyl-ethyl)-4-methyl-phenol + 2,2,4,4-Tetramethyl-7-oxa-3,20-diazadi-spiro []-heneicosan-21-on

Classification: 2:1 mixture of halogenated benzotriazole UV absorber + low molecular weight HALS


Delivery Specifications and (*) General Properties

CharacteristicsUnitTarget ValueTest Method
Appearance whitish-yellow dispersionA.931.0003
Solids content[%]64.8 - 68.6A.951.0001
UVA content[%]33 - 36A.022.1003
HALS content[%]16 - 19A.022.1003
*pH value ~ 7.5 
*Density (20°C)[g/cm³]~ 1.08 



Hostavin 3225-2 DISP is recommended for high performance exterior waterborne wood coating systems.

Recommended dosage level of Hostavin 3225-2 DISP:       1.0 - 3.0% (active additive on solid resin)

Packaging and Handling
Delivery form

PE drums 25 kg
Pallet 300 kg (12 drums)
IBC 900 kg

Hostavin 3225-2 DISP can be stored for at least three years from the date of shipping when kept cool and dry in the original sealed containers.
Storage temperatures above +40°C and below +4°C should be avoided.
Hostavin 3225-2 DISP should always be well stirred prior to use, as a slight sedimentation might occur over time.

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