What is bleeding when working with industrial coatings?

 

Bleeding through is usually caused by the full or partial re-dissolving of the previous coat or an ingredient of a previous coat. It can occur when strong solvents are used in the topcoats.

It can also be present when staining of a paint film by diffusion of a soluble coloured substance from the underlying paint results in an undesirable discoloration or staining.  

It is often also seen where bituminous-or tar-based products are overcoated with topcoats in which the tar or bitumen is soluble. And it can be a problem when using emulsion paints.

 

How can you avoid bleeding when working with industrial coatings?

 

We know bleeding is a problem for a number of coating applications. Here are some ways to avoid bleeding causing you problems when applying industrial coatings. 

Firstly always use the correct coating specification and materials. Check that your coatings are compatible with the materials being coated.

Consider the use of an appropriate sealer coat if possible. 

And to prevent coating failure, it is important to use dye stuffs with enough solvent resistance to prevent bleeding.

These steps will help avoid the time consuming challenge of bleeding and securing a great first-time finish.

 

How can you rectify bleeding when working with industrial coatings?

 

Always consult the paint manufacturer before commencing rework. They will know how the coatings functions best given your materials and coating environment.

The paint bleeding area can be repaired by removing the stained or contaminated layer and applying a suitable sealer coat to prevent the diffusion of soluble-coloured material from the substrate.

Finally, apply a sealer coat to remove the stained or contaminated layer.

 

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