GK Multi-Surface Cleaner & Sanitiser

Product Description

One Multi-Surface Cleaner for the Whole Property

Most outdoor cleaning problems share the same root cause: biological growth. Algae, mould, lichen, fungi, and bacteria establish themselves on hard outdoor surfaces and spread progressively, discolouring, degrading, and in many cases creating hazardous conditions underfoot.

The surface type changes: decking, paving, render, caravans, conservatories, but the contaminating organisms are consistent, and so is the solution.

GK Multi-Surface Cleaner & Sanitiser is built on this insight. Rather than a different product for every surface, it is a single professional-grade outdoor multi-surface cleaner formulated to work across the full breadth of hard outdoor substrates, from block paving driveways to fibreglass boat hulls, artificial grass to canvas tents, pool surrounds to solar panels. One product, one buying decision, and one straightforward application process regardless of which surface you're treating.

For homeowners with diverse outdoor spaces, this means treating the driveway, patio, decking, fencing, garden furniture, and conservatory in a single session without switching between specialist products. For trade cleaning contractors, it means stocking one concentrated cleaning solution that genuinely handles every surface type encountered across a typical property maintenance programme.

What GK Multi-Surface Cleaner & Sanitiser Treats

As an outdoor multi-surface cleaner and sanitiser, this product targets the full spectrum of biological contamination found on outdoor hard surfaces:

• Algae: the biological growth that establishes on shaded, damp surfaces including paving, decking, render, roof tiles, and fencing.
• Mould and mildew: fungal growth on timber, paving, outdoor furniture, and any surface that stays damp after rain.
• Lichen: the combined fungal-algal organism that bonds to stone, masonry, and tile surfaces and is significantly harder to remove than surface algae.
• Bacteria and biofilm: the invisible microbial layer that makes decking, pool surrounds, and patio surfaces slippery underfoot and harbours odour in animal shelters and outdoor wash areas.

The product kills these organisms at a cellular level rather than simply bleaching the visible surface staining, which is why results are more durable than bleach-based alternatives and why subsequent maintenance cycles become progressively easier as baseline biological loading reduces with each treatment.

Virtually Any Hard Outdoor Surface: Confirmed Safe

The defining characteristic of GK Multi-Surface Cleaner & Sanitiser is its exceptional surface compatibility. Because it contains no bleach, no acids, no ammonia, and no solvents, it will not oxidise, discolour, or structurally affect any non-living hard surface. This makes it safe, and genuinely effective, across a range of surfaces where most cleaners cannot be used:

• Outdoor living and landscaping surfaces: driveways (block paving, concrete, tarmac, resin), patios, paths, natural stone (sandstone, limestone, slate, marble), porcelain paving, pool surrounds, non-grass tennis courts.
• Timber and garden structures: decking, fencing, sheds, pergolas, garden furniture, window frames and exterior joinery (with the added benefit of preventing wood rot and providing biocidal disinfection of timber surfaces).
• Exterior building surfaces: render, brick, masonry, roof tiles (clay, concrete, slate), solar panels, conservatories, UPVC, painted exterior surfaces without risk of damage to the paint film, lead works and metal fittings.
• Specialist and leisure surfaces: caravans, motorhomes, fibreglass boats, polytunnels, canvas tents and awnings, yacht sails, artificial grass, Astroturf, outdoor pots and furniture.
• Animal and agricultural: animal shelters, kennels, stable areas, and outdoor run surfaces, safe around animals once fully dry.

The only surfaces excluded are green and sedum roofs.

Foaming Coverage Indicator: Nothing Gets Missed

GK Multi-Surface Cleaner & Sanitiser is a natural surfactant formula that foams vigorously on application by brush or garden sprayer. This foaming behaviour is a practical benefit as well as a chemical one. The visible foam confirms that all areas of the surface are receiving active product. Any section that has not foamed has not been adequately treated. For large surface areas, high walls, or surfaces being treated at height, this visible indicator makes application more systematic and reliable than with non-foaming products.

Concentrated: Outstanding Value per Square Metre

One 5-litre bottle of GK Multi-Surface Cleaner & Sanitiser dilutes to produce up to 25 litres of ready-to-use cleaning solution, treating between 100 and 125 square metres depending on the porosity of the surface and the application method used. Dilution is adjusted to the level of biological contamination:

• Heavy soiling (algae, lichen, or mould with significant biological loading): dilute 2:1 with water.
• Light to medium soiling (general biological staining and routine maintenance): dilute 3:1 with water.

After the initial treatment, subsequent maintenance applications are simpler, faster, and require less product per square metre because the baseline biological loading has already been reduced. Annual or bi-annual maintenance cycles on previously treated surfaces typically produce results within days rather than weeks, and the product goes further on surfaces that are already in a maintained condition.

Bleach-Free, Safe, and Environmentally Responsible

GK Multi-Surface Cleaner & Sanitiser contains no bleach, no caustic chemicals, no acids, and no ammonia. Its virtually neutral pH of 6 means it will not corrode metal fittings, degrade UPVC seals, discolour painted surfaces, or damage any common outdoor material. Once dry, it is safe around children and animals. It is plant-safe provided it is not sprayed directly onto foliage. Any accidental overspray should be rinsed immediately with clean water.