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GK Concentrated Fungicidal Wash 1Ltr
GK Concentrated Fungicidal Wash 1Ltr

GK Concentrated Fungicidal Wash 1Ltr

Brands: GKProductsUK
Regular price£7.20
£6.00 Exc VAT

GK Concentrated Fungicidal Wash is a professional-grade biocide solution specifically engineered for treating mould, fungus, algae, and lichen on interior and exterior surfaces before painting or decorating.

This HSE-licensed (No.10766) fungicidal treatment eliminates 99.9% of biological growth whilst preparing surfaces for immediate decoration—no rinsing or neutralisation required.

Designed as the professional decorator's essential pre-treatment solution, GK Concentrated Fungicidal Wash addresses the root cause of paint failure: biological contamination.

By eradicating fungal and algal growth at the cellular level before paint application, this product ensures long-lasting decoration that won't peel, bubble, or discolour due to underlying biological activity.

Why Use Fungicidal Wash Before Painting?

Painting over mould, algae, or fungus without proper treatment leads to rapid paint failure.

  • Biological organisms continue growing beneath paint films, causing:
  • Premature paint peeling and flaking
  • Discolouration and staining bleeding through new coatings
  • Unpleasant odours in interior spaces
  • Costly redecoration within months rather than years
  • Health concerns from airborne spores

GK Concentrated Fungicidal Wash eliminates these issues by creating a biologically clean surface that allows paint to bond properly and perform as intended.

GK Concentrated Fungicidal Wash is a broad spectrum, surface biocide, for professional use against fungal and algal growths on hard surfaces.

HSE Licence No.10766.

Users must comply in full with all legal responsibilities under The Control of biocides Regulations 1986 including complying with all Conditions of Approval.


Quantity
SKU: CHE / R313/A / 1LTR
Categories : Algae Remover

Product Description

GK Concentrated Fungicidal Wash is a professional-grade biocide solution specifically engineered for treating mould, fungus, algae, and lichen on interior and exterior surfaces before painting or decorating.

This HSE-licensed (No.10766) fungicidal treatment eliminates 99.9% of biological growth whilst preparing surfaces for immediate decoration—no rinsing or neutralisation required.

Designed as the professional decorator's essential pre-treatment solution, GK Concentrated Fungicidal Wash addresses the root cause of paint failure: biological contamination.

By eradicating fungal and algal growth at the cellular level before paint application, this product ensures long-lasting decoration that won't peel, bubble, or discolour due to underlying biological activity.

Why Use Fungicidal Wash Before Painting?

Painting over mould, algae, or fungus without proper treatment leads to rapid paint failure.

  • Biological organisms continue growing beneath paint films, causing:
  • Premature paint peeling and flaking
  • Discolouration and staining bleeding through new coatings
  • Unpleasant odours in interior spaces
  • Costly redecoration within months rather than years
  • Health concerns from airborne spores

GK Concentrated Fungicidal Wash eliminates these issues by creating a biologically clean surface that allows paint to bond properly and perform as intended.

GK Concentrated Fungicidal Wash is a broad spectrum, surface biocide, for professional use against fungal and algal growths on hard surfaces.

HSE Licence No.10766.

Users must comply in full with all legal responsibilities under The Control of biocides Regulations 1986 including complying with all Conditions of Approval.


Our Customers Love Us

Reviews

5 stars
The service was excellent.
Had a question about the product which was answered quickly even though it was a weekend. Product arrived quickly and the delivery was good.
Isabelle Clinton
4 Aug 2025
5 stars
Fantastic customer service and a superfast delivery.
Paul
27 Jul 2025
5 stars
Excellent product.
Mr John Wood
19 Jul 2025
5 stars
Top company, top service & top products! 10/10
A&B Exterior Cleaning Ltd
7 Jul 2025
5 stars
Really quick delivery.. Excellent service.
Mark Gabriel Judd
10 Jun 2025
5 stars
I can't comment on how it works as it takes time and only applied to 2 roofs so far but delivery was rapid.
Shaun
8 Jun 2025

Coverage Rates

1L will treat 40 square metres

Coverage per litre (depending on surface and method)

Application & Storage

Application Guidelines

Surface Preparation: Remove dirt, grease, and loose coatings. Scrape off mosses, lichens, mold, or algae growth using a stiff brush.

Fungicidal Wash Application: Dilute 1 litre of GK Concentrated Fungicidal Wash with 4 litres of water to create 5 litres of usable solution. Apply using a brush, roller, or spray in dry conditions.

Evaporation: Allow the solution to evaporate naturally for optimal effectiveness. No rinsing required.

Repeat Application: For heavily infected surfaces, a further application may be necessary.

Caution: Wear appropriate PPE, including protective gloves and eye/face protection, during application.

Storage

Store in the original unopened container in a clean, dry
area for up to 24 months from the date of manufacture. Do not store below 5⁰C.

Product FAQs

Will this kill garden plants close to the wall?

If used as instructed no. However please be careful, accidental overspray onto plants can scorch foliage but should not kill your plants. If plants are in the vicinity, before applying GK CFW, we recommend watering well and covering with a waterproof fleece. If you notice an accidental overspray during treatment rinse of thoroughly with water.

What’s the best way to apply the solution, sponge, roller?

GK CFW is very forgiving, as long as you follow the dilution instructions and saturate the surface you can even apply with a watering can, with a garden pump sprayer, paint brush, sponge, trigger spray or roller whichever suits.

Can this be applied in wet conditions?

Apply the product in dry conditions.

Can this be used on KREND?

Yes. Because it only attacks living bacteria it has no impact on the substrate material to which it’s being applied.

Can I use this on pebble dash?

Yes, CFW is safe to use on all substrates, although we do like the surface to be saturated so coverage may not be as great as that of scratch render.

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Why us

Why Choose GK?

We believe in constant innovation. Our team is dedicated to finding new and better solutions that the industry needs, providing the most effective, least harmful, and safest professional-quality products to our customers. We use high-quality active ingredients that deliver superior, longer-lasting results. By avoiding harsh chemicals, we ensure a safer cleaning process for surfaces and substrates, as well as for the environment. Whether you're an industry professional or a DIY enthusiast, you can expect our products to provide a thorough, lasting clean that leaves your surfaces pristine. So if you’re tired of products on the market delivering a sub-par clean, want to experience professional-quality results, or even find comfort in knowing that your cleaning products are safer for your surfaces and the environment, then why not try our range of GK cleaning products for yourself?

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