Removing egg stains from render
Egg stains on render are caused by proteins soaking into the pores of the surface. The most effective method is to break down the proteins first using an enzyme detergent, followed by a cleaning treatment such as Tornado Cleanze if any staining remains.
Egg stains on render are surprisingly common. Unfortunately they can also be surprisingly stubborn if they are not treated correctly.
Egg is primarily made up of proteins and fats. When it hits a porous surface such as render, those proteins can soak into the pores of the substrate and bind to the minerals in the render. Once dried, this can leave visible staining that may remain after simple washing.
Because of this, the best approach is to break down the proteins first, rather than immediately trying to bleach or oxidise the stain.
Step 1 - Break down the proteins
Prepare a strong solution of warm water and an enzyme detergent, such as a laundry stain remover designed to remove organic stains.
Products designed for removing food or protein stains contain enzymes which break down the proteins in the egg.
Mix a strong solution of warm water and enzyme detergent and apply it to the affected area using a brush.
Allow it to dwell for 20–30 minutes.
Agitate gently with the brush.
Rinse thoroughly with clean water.
In many cases this process will remove the majority of the staining.
Step 2 - Treat any remaining staining
If a residual stain remains after the protein has been broken down, a follow-up treatment can help remove any remaining discolouration that has penetrated the render.
Apply Tornado Cleanze to the stained area.
Brush the product into the render to ensure good contact with the surface.
Allow approximately 30 minutes dwell time.
Agitate again if necessary.
Allow a further 15 minutes dwell before rinsing thoroughly.
This second stage will usually remove the remaining staining.
Important practical advice
As with all render cleaning work:
• Always test a small area first to ensure compatibility with the surface.
• Avoid aggressive pressure washing which can damage the render.
• Use gentle brushing and proper dwell time instead of force.
Render is a porous material, and patience usually produces far better results than aggressive cleaning methods.
Final thoughts
Egg stains can look dramatic at first, but they are usually manageable once treated correctly.
The key is understanding the nature of the stain. Because egg is a protein-based contamination, the most effective approach is to break down the protein first using an enzyme detergent, and then remove any remaining discolouration with a suitable cleaning treatment.
Taking this two-step approach will usually restore the appearance of the render without damaging the surface.
Frequently asked questions
Can egg stains permanently mark render?
Egg stains can soak into the pores of render because egg contains proteins and fats. If the proteins dry and bind to the minerals in the render, visible staining can remain even after simple washing. However, the stain can usually be removed if treated correctly.
Why should enzyme detergent be used first?
Egg is a protein-based contamination. Enzyme detergents break down proteins into smaller compounds that can be rinsed away. If you attempt to bleach the stain immediately, the proteins can set deeper into the render and become harder to remove.
Can pressure washing remove egg stains?
Pressure washing alone is rarely effective and can damage render. The stain is usually within the pores of the material rather than sitting on the surface. It is better to use chemical treatment and dwell time rather than aggressive pressure.
Why use Tornado Cleanze after the enzyme treatment?
Once the proteins have been broken down and rinsed away, Tornado Cleanze can help remove any remaining discolouration or egg residues. This two-stage approach usually produces the best results.
Should a test patch be carried out?
Yes. Always test a small area first. Different render types and finishes can react differently to cleaning treatments, and testing confirms compatibility before treating a larger area.
We wish you all the best in your soft washing business,
Team Benz
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