Quebec masonry contractors evaluating acid cleaners face a real decision: PROSOCO, EaCo Chem, and hardware-store muriatic are all available the same day. This page lays out exactly how they compare — substrate safety, liability exposure, and the regulatory reality of working in Quebec — so you can make the call with your eyes open.
StoneKraft data pulled from product TDS/SDS. Competitor cells marked "varies" where not publicly verifiable.
| Property | StoneKraft Liquid Cleaner | PROSOCO Sure Klean 600 | EaCo Chem NMD 80 | Muriatic Acid (hardware store) |
|---|---|---|---|---|
| pH | 1.5 – 2.5 | varies (~1.5 – 2.5) | varies | 0.1 – 1.0 |
| Active acid chemistry | Organic acid blend (proprietary) | Buffered acid blend, HF-free | HCl / phosphoric blend (varies) | 31% HCl (hydrochloric) |
| Biodegradable | ✓ | varies | varies | ✗ |
| Phosphate-free | ✓ | varies | varies | ✓ |
| Safe on painted surfaces | ✓ | varies | varies | ✗ |
| Safe on anodized aluminum | ✓ | varies | ✗ (HCl attacks aluminum) | ✗ |
| Mortar damage risk | Low | Low (with correct dilution) | Medium – High | High |
| Vapor pressure / fumes | Low (non-volatile formula) | Low – Medium | Medium | High (HCl fumes) |
| Quebec winter formulation | ✓ (freeze point −10 °C) | varies | varies | ✗ |
| Contractor liability profile | Low | Low – Medium | Medium | High |
| Bilingual SDS (EN + FR) | ✓ | EN only | EN only | varies |
| Technical support in French | ✓ | ✗ | ✗ | ✗ |
Muriatic acid at 31% HCl has no buffering — it attacks calcium silicate binders in mortar faster than it dissolves calcium carbonate deposits. On heritage brick or colored mortar, a 10-minute overexposure can require full re-pointing at $4–8 per linear foot. More critically, if the substrate damage surfaces on a warranty inspection, you own it. Hardware-store SDS sheets don't mention mortar repointing risk. Your insurance company will.
Post-2000 commercial construction in Quebec — curtain walls, storefront systems, industrial units — uses anodized aluminum extensively. Hydrochloric and some phosphoric acid formulations strip the anodized oxide layer on contact, leaving permanent gray staining that requires re-anodizing (not recleanable). A missed window frame on a new-construction clean can cost more than the entire contract in remediation. StoneKraft's pH is controlled high enough that the anodized layer remains stable.
Quebec's Règlement sur les ouvrages municipaux d'assainissement des eaux usées and municipal by-laws in Montréal, Québec City, and Longueuil prohibit the discharge of corrosive or non-biodegradable chemicals into storm drains. An exterior masonry job with muriatic or persistent-acid runoff is a direct by-law violation that can result in stop-work orders and fines up to $25,000 for the contractor of record. StoneKraft is formulated for biodegradable breakdown — a defensible position if a municipal inspector appears on site.
A single re-do on a 2,000 ft² commercial facade costs a Quebec contractor between $6,000 and $10,000 in direct labor, equipment, and re-materials — before accounting for project delays, subcontractor conflicts, and reputation damage with the GC. At the volumes contractors actually order (10L–20L), StoneKraft costs roughly $99–$149 more per job than a generic alternative. The risk differential is not $99. It's $6,000.
The $349 product price is not a premium. It's insurance against a $6,000–$10,000 claim.