Product Data Sheet Safety Data Sheet Show all documents

Sika® 404 Fungicidal Wash

Powerful, fast acting fungicidal wash

Sika® 404 Fungicidal Wash is a powerful, fast acting solution which is effective on most surfaces. It quickly removes mould, fungus and lichen from floors, walls, drives and roofs. It also leaves a residual surface to help prevent further infestation.

  • Active ingredients Alkyl (C12-16) Dimethylbenzyl ammonium Chloride (0.99%w/w) 2-Phenylphenol. (0.25% w/w).
  • Leaves a residual surface to help prevent future infestation.
  • Ready to use - do not dilute.
  • For internal and external use.
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Product Data Sheet Safety Data Sheet Show all documents

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Registered with HSE under 'Control of Pesticides Regulations;1986'.
Product Information

Shelf Life

24 months from date of manufacture when stored in original, unopened container under the recommended storage conditions.

Storage Conditions

Store in cool dry conditions away from direct sunlight in original packaging between +5 °C and +40 °C. STORE AWAY FROM CHILDREN. Protect from frost. Storage outside these conditions will dramatically reduce shelf life.

Density

1.0 g/cm³ at +20 °C.

Freezing point

0 °C approx.

Application

Application Information

Drying time

1-12 hours from washdown depending on surface.
Consumption

Yield

1 L will cover approximately 5-10 m² of surface depending on porosity of the surface, type and quantity of surface infestation.
Application steps

APPLICATION

Always read label before use and wear suitable protective equipment. Supplied ready to use. Do not dilute. Remove all surface debris and growth from the area to be treated. Apply by brush or low pressure spray at a rate of 1 litre per 5 - 10 m2 depending on porosity of surface. Leave solution for 20 minutes. Finally, scrub with cold water until the surface is clean. Repeat process for badly infested areas. Take care not to allow residues to run directly into fresh watercourses.

Documents

FAQ

What is Sika® 404 Fungicidal Wash used for?

Sika® 404 Fungicidal Wash is a powerful mould, algae, and lichen remover that cleans and protects surfaces both indoors and outdoors. It’s ideal for use on walls, patios, roofs, and drives, as well as for preparing surfaces before applying coatings.

Does Sika® 404 Fungicidal Wash prevent regrowth?

Yes. It leaves a protective residue that continues to inhibit fungal, mould, and algae regrowth, keeping surfaces cleaner and safer for longer.

Are there any precautions I should take when using Sika® 404 Fungicidal Wash?

Avoid applying in wet weather or if rain is expected soon. Prevent runoff from entering ponds or watercourses and always store the product safely away from children and pets. Read the Product and Safety Data Sheets before use.

How do I apply Sika® 404 Fungicidal Wash?

Simply apply it straight from the bottle - do not dilute. Using a stiff brush or low-pressure sprayer. Let it soak for around 20 minutes, then rinse thoroughly with clean water. No mixing ordilution is required.

Can Sika® 404 Fungicidal Wash be used indoors and outdoors?

Yes. It’s suitable for internal and external use, making it perfect for damp interior walls, outdoor patios, paths, roofs, and drives.

Can I use Sika® 404 Fungicidal Wash before painting or sealing?

Absolutely. It’s ideal as a pre-treatment before applying bituminous coatings, paints, or sealers, ensuring a clean, mould-free surface for better adhesion and long-term results.

How do I apply Sika® 404 Fungicidal Wash?

Simply apply it straight from the bottle - do not dilute. Using a stiff brush or low-pressure sprayer. Let it soak for around 20 minutes, then rinse thoroughly with clean water. No mixing ordilution is required.

How long does it take for Sika® 404 Fungicidal Wash to work?

You’ll start to see results within minutes. For heavily infested areas, leave the product for up to 20 minutes before rinsing, and repeat the process for heavily infested areas if needed.

What types of surfaces can I use Sika® 404 Fungicidal Wash on?

Sika® 404 Fungicidal Wash is a versatile cleaner suitable for use on most common building materials, including brick, concrete, render, stone, roof tiles, tarmac, and more. It’s highly effective on most mineral or porous surfaces affected by mould, algae, or green growth. It can also be used on glass, wood, ceramics,and many types of plastic.

Ideal for outdoor use on:

Paths, patios, and paving slabs

Decking, fences, sheds, and garden furniture

Greenhouses and other exterior surfaces

For interior use, it’s specially designed to eliminate mould from wallpaper, paintwork, plaster, ceilings, and other surfaces. It’s particularly effective for removing mouldy sealant around baths, showers, and sinks, as well as cleaning ceramic tiles and mould-stained grout.