ULIX Type X for designs that specifically list UltraLight Innovation panels per USG
Key features
Lighter nominal weight than 2.2 lb/sq ft standard Firecode X per USG data
Ten-foot length for tall rated partitions with reduced horizontal joints
Technical specifications
| R-Value | 0.56 |
|---|---|
| Thickness | 0.625 in |
| Width | 48.0 in |
| Length | 120.0 in |
| Coverage | 40.0 sq ft/pack |
| Material | Innovative noncombustible gypsum core with recycled papers—EcoSmart Firecode X composite per USG |
| Fire rating | 5/8 in. enhanced proprietary Type X (UL Type ULIX per USG EcoSmart Firecode X); use only in UL designs listing ULIX panels; not interchangeable with SCX or FC30 without design review. |
| Sound rating | Acoustic performance is assembly-dependent; gypsum finish layers contribute to STC in tested partition assemblies (ASTM E90). |
| Density | Nominal 1.8 lb/sq ft per USG EcoSmart Firecode X specifications |
| Construction type | ASTM C1396 for 5/8 in. Type X gypsum wallboard per USG EcoSmart Firecode X |
| Application area | Interior rated assemblies listing ULIX panels; coordinate sustainability submittals per USG docs |
Product details
Ten-foot rated partitions benefit from lighter ULIX sheets when crews hang hundreds of boards per week: seventy-two pounds nominal per forty-square-foot sheet at 1.8 lb per square foot per USG versus eighty-eight pounds for 2.2 lb per square foot SCX changes cumulative strain injuries and hoist time.
USG positions EcoSmart Firecode X against Architecture 2030-style product challenges while maintaining Type X language under ASTM C1396 in its downloads—pair those claims with the actual UL sheet the engineer signed.
Sustainability paperwork (EPD/HPD, Declare LBC Red List Free per USG marketing) should be version-controlled like any other submittal; reviewers reject stale PDFs.
Sound and sag claims in USG literature still defer to tested assemblies—quote STC values only from lab reports, not from product adjectives.
Keep Moisture Resistance: No in mind: damp rated corridors may still need mold-tough Type X or separate moisture management even when using EcoSmart facers.
Documents & certifications
Technical data sheet
Manufacturer-tested R-value, coverage, fire notes, and handling—use for submittals, RFIs, and field QA.
Download PDF (opens in new tab)Certifications & compliance
GREENGUARD Gold; UL classification per USG; EPD/HPD links on USG download center; Declare LBC Red List Free per USG
Frequently asked questions
Does ULIX always reduce layers?
Does ULIX always reduce layers?
Layer counts come from the UL design, not from marketing claims—ULIX describes the panel type, not automatic layer reduction.
Can architects mix SCX and ULIX in one rated wall?
Can architects mix SCX and ULIX in one rated wall?
Only if the tested assembly explicitly allows it; default assumption is strict adherence to the listing.
What about sound performance?
What about sound performance?
USG states comparable sound, strength, and sag positioning versus standard 5/8 in. Type X—still verify STC with the tested assembly.
Where is the official PDF?
Where is the official PDF?
Download the EcoSmart Firecode X data/submittal sheet from USG’s product page and keep the revision date with your submittal package.