I'm Experiencing Pinholing When Spraying Tikkurila Paints

Pinholes tend to appear when too low a film build is applied to the substrate. If the spray film is too low due to lack of pressure, wrong tip selection or over thinning then the atomised product does not flow correctly over the substrate and gaps appear (pinholes). Pinholes are most common when applying black and white as visually it is very difficult to distinguish between a first coat and a second. When using these colours the natural propensity is to apply a lower film build by sweeping over the surface faster in order to avoid runs and sags. Pinholes very rarely occur when first coating over primer as the shade differentiation is such that the sprayer can easily see the volume of paint being applied and is more confident that the film is as it should be.

Issue: Pinholes in sprayed film

Cause: Low film build

Solution: Apply more product.

This can be achieved as follows:
- Adjust pressure
- Change tip size
- Slow down sweep over substrate

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Disclaimer: Tikkurila UK Paint Calculator is provided as a guide only. The coverage rates will vary depending on surface being coated and the particular product range being used. More information on these products can be found on the cans, on the technical data sheets on individual product pages, by using our live chat service or by calling our technical team on 0131 334 4999.

Every effort has been made to ensure the accuracy of the estimate, however paint requirements may vary depending on the surface, type of paint, sheen level and colour chosen.