Collection: Thinners

Thinners are additives that improve the workability of construction materials by modifying viscosity. When used correctly, they adjust the consistency of paint, primer, or coating before application to suit the desired method—brush, roller, or spray gun. Incorrect thinning reduces the material's performance, so only thinners approved by the manufacturer should be used.

When is thinning necessary?

Not all materials require thinning. Many modern water-based paints and primers can be applied directly—the manufacturer's datasheet specifies whether thinning is needed and to what extent. Thinning may be necessary:

• When applying with a spray gun, where lower viscosity is needed for proper spray pattern;
• At low temperatures, where the material thickens and becomes harder to apply;
• For certain primers, where the manufacturer specifies the mixing ratio and thinning level.

Water-based and solvent-based thinners

For water-based materials: clean water or a dispersion thinner specified by the manufacturer. Do not mix with solvent-based thinners.

For solvent-based materials: xylene, toluene, white spirit, or a product-specific solvent matching the composition. Confirming the solvent type with the material is mandatory—an incompatible solvent will ruin the curing process.

Degree of thinning

The degree of thinning is always determined by the manufacturer's datasheet. Excessive thinning reduces coverage, weakens curing strength, and can damage the coating's film-forming properties. Adding "just a little more water" may seem harmless but fundamentally affects the material's performance.

Browse our selection of thinners or request advice to choose a thinning system compatible with your material.