For fast, dust-controlled preparation of floors and steel, shot blasting drives steel shot at the surface and recycles it in a closed loop. Goliath Coatings provides shot blasting across Auckland to profile concrete floors and clean steel ahead of coating, leaving a consistent, ready-to-coat surface with minimal mess.
How shot blasting prepares a floor
A shot blaster throws steel shot onto the surface and immediately vacuums it back up along with the debris, separating and reusing the shot. On concrete it removes laitance, old coatings and curing residue and leaves an even profile that lets the next coating key in mechanically. Because it is a contained, near-dustless process, it is ideal for floor prep inside occupied buildings.
Consistent profile, low mess
The big advantage over hand methods is consistency — a shot blaster delivers the same profile across a whole floor at walking pace, so a large warehouse or carpark slab is prepared evenly and quickly. The closed-loop recovery keeps dust down and leaves the surface clean and ready to coat with little clean-up.
Floors and steel
We shot blast concrete floors ahead of resin, polished or membrane systems, and clean structural steel and plate back to a sound, profiled surface for protective coating. We match the shot size and intensity to the substrate and the coating that follows, so the profile is right for the job — not too light to bond, not so aggressive it wastes time.
The profile shot blasting leaves
Shot blasting throws steel shot at the floor in a contained, recyclable cycle that strips coatings and laitance and leaves a clean, even anchor profile — typically around ICRI CSP 2–4 depending on the setting. Because the machine recovers the shot and dust as it runs, it is a low-mess, low-dust way to prepare large concrete floors and steel for coating. It is the standard preparation for warehouse and industrial floors ahead of epoxy, polyurethane and cementitious-urethane systems.
Why choose Goliath Coatings
Mechanical floor and steel preparation are a specialty. We open up concrete and steel to the exact profile a coating needs using an enclosed, dust-controlled process — no chemicals, minimal mess, and a surface that’s ready to coat straight away. Free on-site assessment, one-business-day response, and 5-star Auckland reviews.
Shot blasting FAQs
Q: Is shot blasting dusty?
A: Very little — the steel shot and debris are vacuumed back up in a closed loop, so it suits floor prep inside occupied buildings.
Q: What is shot blasting used for?
A: Profiling concrete floors before coating and cleaning structural steel — anywhere you need a consistent, ready-to-coat surface fast.
Q: Why prepare a floor before coating?
A: A correct profile lets the coating key in mechanically, which is what stops it delaminating later. Shot blasting delivers that profile evenly.
Q: What profile does shot blasting leave?
A: A clean, uniform anchor profile around CSP 2–4 — ideal for bonding epoxy, polyurethane and cementitious-urethane floor systems, with very little dust because the machine recovers the shot.
Q: What determines the cost?
A: The surface area, the media required, and what is being removed — coatings, corrosion or contamination. We inspect the surface free of charge and quote a firm price for the finish standard you need.
Q: Is the work guaranteed?
A: Yes — our workmanship is guaranteed and we install proven systems from leading suppliers. Goliath Coatings is fully insured, Tōtika accredited and Site Safe certified.