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Surface preparation guide

Grit-Free Surface Preparation: Comparable to SSPC-SP10, Without the Blast Booth

What is it?

Grit-free surface preparation is a mechanical method that removes corrosion and coatings and generates an anchor profile in a single step, without abrasive media. MontiPower's Bristle Blaster® reaches cleanliness comparable to ISO 8501-1 Sa 2½ & Sa3 with a controllable 65–85 µm Rz (2.6–3.3 mil) profile (also comparable to SSPC-SP10), with no grit, no dust and no blast containment.

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How grit-free preparation works

Forward-curved bristle tips strike the surface with kinetic energy comparable to grit-blast media, then retract instantly. That impact-and-rebound action removes corrosion and coatings and cold-works a clean, micro-indented anchor profile in one pass: no heat, no smearing, no embedded grit. For heavy build-up, the Two-Step Method pairs Tercoo® heavy removal with the Bristle Blaster® finish.

The standards it meets

Grit-free preparation reaches surface cleanliness comparable to ISO 8501-1 Sa 2½ & Sa3 and AMPP SSPC-SP10 / SP5 (NACE No. 2 / No. 1), with a controllable 65–85 µm Rz (2.6–3.3 mil) anchor profile (up to 120 µm Rz) measured by replica tape to ASTM D4417-C. Digital data tracking provides a traceable audit trail for the most demanding coating specifications.

Where grit-free preparation wins

The further a job is from an open blast yard, the more grit-free wins: ATEX Zone 1 offshore platforms, in-service refineries and tanks, confined spaces, weld seams and field joints, bridges and rail under live traffic, and spot repair where containment is impractical. It is the only hand-held method comparable to ISO 8501-1 Sa 2½ & Sa3 without a blast pot.

Limitación honesta. For continuous open areas above ~5,000 m² in unrestricted environments, abrasive blasting may still be more economic. Grit-free wins where containment, in-service access, ATEX zones, confined spaces or substrate integrity matter.

Cómo se compara

Grit-free vs. the alternatives

Metric	Bristle Blasting®	Grit blasting	Dry ice
Surface cleanliness	Comparable to ISO 8501-1 Sa 2½ & Sa3	ISO 8501-1 Sa 2½ & Sa3	Cleaning only
Anchor profile	65–85 µm Rz (2.6–3.3 mil)	Variable / high	None
Loose abrasive / media	None	High volume	CO₂ (sublimes)
Containment	Minimal	Mandatory	Often required
In-service / spot repair	Yes	Rarely	Limited
Substrate integrity	Cold-working	Grit embedment risk	No profile

Preguntas frecuentes

Frequently asked

What is grit-free surface preparation?

Grit-free surface preparation cleans corrosion and coatings and sets an anchor profile mechanically, in one step, with no abrasive media. MontiPower's Bristle Blaster® reaches cleanliness comparable to ISO 8501-1 Sa 2½ & Sa3 with a 65–85 µm Rz (2.6–3.3 mil) profile, with no grit, dust or containment.

Can you achieve SSPC-SP10 without grit blasting?

Yes. Bristle blasting reaches a cleanliness and anchor profile comparable to SSPC-SP10 / SP5 (NACE No. 2 / No. 1) and ISO 8501-1 Sa 2½ & Sa3 (the standard most coating specifications demand), without any abrasive blasting.

What anchor profile does the Bristle Blaster® achieve?

The Bristle Blaster® generates a controllable 65–85 µm Rz (2.6–3.3 mil) anchor profile (up to 120 µm Rz), measured by replica tape to ASTM D4417-C.

Is grit-free preparation as economic as blasting for large areas?

For continuous open areas above roughly 5,000 m², abrasive blasting may be more economic. Grit-free wins on spot repair, in-service work, ATEX zones, confined spaces and anywhere containment or substrate integrity matters.

Does grit-free preparation help with OSHA silica dust exposure limits?

Yes. Because the Bristle Blaster® generates no loose abrasive or blast dust, it avoids the respirable crystalline silica generated by traditional sand and grit blasting, helping crews stay under the exposure limits set by OSHA's Respirable Crystalline Silica standard (29 CFR 1910.1053) without additional containment or air monitoring for silica.

Go deeper

Related guides & solutions

MethodThe Controlled Preparation System ProductBristle Blaster® Technology ProofCase studies: measured results IndustryOil, Gas & Heavy Industry IndustryMarine & Offshore ApplyFind a certified applicator CostCorrosion control: a practical framework QualityAnchor profile measurement in the field MaintenanceIndustrial coatings & their preparation needs Anchor profile: 65–85 µm Rz (2.6–3.3 mil) explained Rust removal without grit Grit blasting vs bristle blasting Chromium-6: safe coating removal Mill scale removal Weld cleaning & finishing Abrasive blasting: how it works & alternatives The 10 types of abrasive blasting Preparing metal for coating Sparkless preparation (ATEX) Rotary wire brush tools: the honest comparison Cordless preparation on the CAS platform In-service preparation: no shutdown, no hot work permit

Especifique con confianza

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The method, the tools and the field, in one film.

Grit-free preparation,
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From the field

Grit-free, photographed

Next step

Grit-free preparation,
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