Safety glazing — the glass that goes beside doors, into floor-level windows, into shower enclosures, onto staircase landings — needs documented third-party certification before any serious specifier will accept it. For North American markets, the dominant credential is SGCC certification. This article explains what SGCC is, what the COMP designation means, and — critically — how to verify a supplier's claim before committing to a purchase order.
What SGCC is and why it exists
The Safety Glazing Certification Council (SGCC) is an independent, not-for-profit certification body that tests and certifies glazing products against ANSI Z97.1 (the US safety glazing standard) and the Consumer Product Safety Commission's 16 CFR Part 1201 regulation. When a glazing manufacturer achieves SGCC certification, it means their product has been tested by an accredited laboratory, found to meet the safety performance requirements, and is subject to ongoing random auditing of production samples.
SGCC certification is not a one-time test. Certified manufacturers are subject to quarterly production audits, where SGCC purchases glazing samples from the manufacturer's production line and tests them independently. If a sample fails, the certification is suspended. This ongoing surveillance is what makes SGCC certification meaningful as a quality assurance signal — not just a historical test result, but evidence of current production compliance.
What COMP means: The COMP designation on an SGCC certificate confirms the product has been tested and certified against ANSI Z97.1-2015 (Class A — the most stringent impact classification) and CPSC 16 CFR 1201 — the two recognized safety glazing standards for North American markets. It is the independent third-party credential architects, specifiers, and building officials look for.
What the COMP designation actually verifies
COMP is not awarded automatically. A manufacturer must submit samples to accredited test laboratories, demonstrate compliance across the full range of ANSI Z97.1 impact and durability tests, and maintain quality management systems that pass SGCC's quarterly surveillance audits. The designation on the certificate is the proof those tests have passed and that the production line is still being audited today.
In practical terms: COMP tells you the product has survived a 400 ft-lb impact test, that fragmentation on breakage meets the Class A pattern, and that the manufacturer is still being independently monitored. That is a meaningfully different document from a manufacturer's own data sheet.
When a specifier asks for documented third-party safety glazing certification, SGCC #9744 with the COMP designation provides exactly that — a current, independent, publicly verifiable certificate from the leading North American safety glazing certification body.
How to verify certification at sgcc.org
The SGCC maintains a public online directory of all current certifications at sgcc.org. Verification takes approximately two minutes and requires no account or login. Here is the exact process:
Why certificate numbers matter: not all VIG is the same
Multiple manufacturers produce vacuum insulated glass. Each manufacturer has their own SGCC certificate number — or does not have one at all. A certificate issued to Manufacturer A covers only Manufacturer A's production, at their facility, under their quality management system. It does not extend to any other manufacturer's product, regardless of how similar the product appears on a specification sheet.
When evaluating a VIG supplier, the correct question is not "does this product have SGCC certification?" but "what is the SGCC certificate number, and can I verify it is current at sgcc.org?" A supplier who cannot answer the first question or whose certificate number cannot be verified at sgcc.org is selling you an uncertified product.
VIG Horizon Inc. exclusively supplies glass covered by Leadus Technology's SGCC Certificate #9744 (COMP, F26 period). A current certificate copy is included in every specification package and with every shipment. Verification at sgcc.org takes under two minutes.
"The certificate number is the credential. Not the product name, not the marketing language, not the company's country of origin. The number that appears — or doesn't appear — at sgcc.org."
VIG Horizon Inc.What to ask your supplier
Before committing to any VIG supplier, request the following in writing:
- SGCC certificate number and current period designation
- Confirmation of COMP designation (ANSI Z97.1 Class A + CPSC 16 CFR 1201)
- IGCC/IGMA seal durability certificate number (ASTM E2190)
- TÜV Rheinland or equivalent independent thermal test report number
- Confirmation of which glazing configurations are covered by each certificate
Any supplier who cannot provide all five items in writing is not adequately documented for use on serious commercial or institutional projects.