How Dry Ice Blasting Works
Dry ice blasting uses solid CO2 pellets propelled at high velocity by compressed air. Unlike sandblasting, soda blasting, or pressure washing, the cleaning mechanism relies on three simultaneous physical effects:
Kinetic energy
Pellets strike the surface at high speed, breaking the bond between the contaminant and the substrate.
Thermal shock
CO2 pellets are -78.5°C. Contact with the surface creates a rapid temperature differential that causes contaminants to contract and lose adhesion, particularly effective on thick paint, bitumen, resin, and fire soot.
Sublimation expansion
On impact, dry ice instantly converts from solid to gas (sublimation), expanding to 800 times its volume. This micro-explosive effect lifts contaminants away from the surface.
The result
A complete clean with no residue from the blasting media. The only waste is the contaminant itself, which is swept or vacuumed after blasting.
Why Dry Ice Blasting, Compared to Other Methods
The table below summarises why dry ice blasting is specified for applications where other methods create secondary problems:
Non-abrasive
Unlike sandblasting and garnet blasting, dry ice does not erode the substrate. Safe on aluminium, mild steel, stainless steel, fibreglass, rubber, and plastics.
Non-conductive
Dry ice is safe for electrical components, switchgear, transformers, and motors. Pressure washing and chemical cleaning are not.
Zero secondary waste from media
The dry ice pellets sublimate on impact, the only waste is the contaminant removed. No blast media to sweep, contain, or dispose of.
No moisture
Unlike pressure washing and steam cleaning, dry ice blasting leaves surfaces dry. Equipment can be returned to service immediately, no drying time.
Food-grade safe
CO2 is a food-grade gas. Dry ice blasting is approved for cleaning food contact surfaces and food processing equipment without chemical residue.
In-place cleaning
Equipment does not need to be disassembled and moved to a cleaning facility. We clean in-situ, eliminating transportation, disassembly, and reassembly time.
Industries We Serve
Food Processing and Manufacturing: Conveyor lines, mixers, ovens, slicers, and cold room panels cleaned to food-grade standard without chemical residue or wet downtime.
HACCP compliant process.
Fire Damage Restoration
Dry ice blasting is uniquely effective for fire-affected properties. It removes soot from structural timbers, electrical components, concrete, and brick without water, the critical advantage in a fire restoration environment where additional water damage must be avoided. Alliance Remediation combines dry ice blasting with our full fire restoration service for a single-provider integrated outcome.
Industrial Plant and Machinery
Hydraulic systems, injection moulding machines, printing presses, CNC equipment, and industrial ovens. We clean in-place without disassembly.
Automotive and Classic Vehicles
Engine bay cleaning, undercarriage degreasing, chassis preparation for restoration projects, and pre-paint surface preparation for bodywork.
Civil and Construction
Bitumen removal from plant and equipment, concrete formwork cleaning, and construction equipment degreasing.
Electrical and Power Infrastructure
Switchboards, bus bars, transformers, and cable trays. Dry ice is non-conductive and safe for energised equipment in many applications (subject to risk assessment).
Heritage and Sensitive Surfaces
Stone, brick, heritage timber, and delicate architectural surfaces where abrasive methods would cause irreversible damage.
Dry Ice Blasting for Fire Damage Restoration
This is where Alliance Remediation has a distinct advantage over specialist blasting-only companies. When a fire-affected property requires restoration, the integration of dry ice blasting into the broader restoration process eliminates duplication, reduces overall cost, and produces a better outcome.
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Fire soot, particularly on timber roof structures, masonry, and electrical infrastructure, is extremely difficult to remove by conventional methods without wet processes that introduce additional water damage risk. Dry ice blasting removes soot cleanly from timber joists, rafters, brickwork, electrical conduit, and switchboards without any moisture whatsoever.
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When you engage Alliance Remediation for fire restoration, dry ice blasting is available as an integrated component of the same job, one team, one scope, one invoice.
FAQ Section — Dry Ice Blasting
Is dry ice blasting safe for electrical equipment?
How does dry ice blasting compare to sandblasting?
Sandblasting is abrasive, it removes surface contamination by erosion of both the contaminant and the substrate. This makes it unsuitable for sensitive surfaces, electrical components, food contact areas, and any application where dimensional accuracy matters. Dry ice blasting achieves an equivalent result on most contaminants without abrasion. Dry ice blasting also leaves no blasting media waste, unlike sand, soda, or garnet.
Does dry ice blasting leave any residue?
No media residue. The dry ice pellets sublimate (convert directly to gas) on impact, leaving only the removed contaminant. This is a significant advantage in food processing facilities and clean environments where media contamination is not acceptable. The removed contaminant is swept or vacuumed after blasting.
How much does dry ice blasting cost in Melbourne?
Pricing varies by application type, surface area, and contaminant type. Industrial cleaning jobs are typically quoted on a day-rate or square-metre basis. Fire restoration dry ice work is quoted as part of the overall restoration scope. Contact us on 1300 798 726 to discuss your specific application.
Can dry ice blasting be used on heritage surfaces?
Yes, and it is often specified for heritage applications precisely because it is non-abrasive. Dry ice blasting removes paint, organic growth, soot, and grime from stone, heritage brick, timber, and terracotta without surface erosion. It has been used extensively in heritage building conservation work both in Australia and internationally.