SilentFX Acoustic Drywall
SilentFX QuickCut is a dual-density 5/8" Type-X noise-reduction gypsum board built around a viscoelastic polymer damping layer that dissipates vibration inside the sheet itself. It scores and snaps like standard drywall, installs on resilient channel or directly to studs, and pairs with Green Glue Noiseproofing Compound between two layers for the strongest STC gains — an ideal drywall choice for residential, multifamily, studio, and commercial acoustic assemblies.
- High Acoustic Attenuation: Dual-density gypsum drywall engineered with a viscoelastic layer that disrupts noise vibrations before they cross the assembly.
- Fast, Clean Installation: QuickCut score-and-snap, tapered edges, and standard 4'×8' sizing streamlines prep and drops into any standard framing layout.
- Penetration Control: Works with Green Glue Acoustic Sealant, Putty Pads, and airtight detailing to limit flanking paths at outlets, seams, and perimeters.
- Safety & Resilience: 5/8" Type-X, Class-A surface burning (ASTM E84), and M2Tech mold- and moisture-resistant facers — a top option for high-quality acoustic assemblies.
- Cost-Smart Performance: Delivers strong noise reduction with fewer layers and less labor than most comparable high-mass drywall options.
Online orders up to 299 sheets. For anything larger, call (415) 864-4440 and we'll price the project with you.
Freight shipments include a $100 freight-and-handling charge.
SilentFX QuickCut Specifications
- Size
- 4' × 8' × 5/8" Type X
- Weight
- ≈ 90 lb per sheet (2.8 psf)
- Core Material
- Dual-density gypsum with viscoelastic polymer damping layer
- Face / Backing
- M2Tech moisture- & mold-resistant facers
- Fire Rating
- Type X · Class A (ASTM E84) · Flame Spread 0, Smoke 0–5
- Abuse Resistance
- Abrasion Level 3 · Indentation 1 · Soft-Body Impact 2 · Hard-Body Impact 2
- Certification
- GREENGUARD Gold
- Edge Profile
- Tapered edge, QuickCut score-and-snap
SilentFX QuickCut Project Calculator
Enter your surface square footage — we'll dose SilentFX at 1 sheet per 32 sq ft (single-layer). Toggle 'Green Glue 2nd layer' to double the count when your assembly sandwiches Green Glue Compound between two SilentFX layers.
Default dose is 1 sheet per 32 sq ft (single-layer). Toggle 'Green Glue 2nd layer' to double the count when your assembly sandwiches Green Glue Noiseproofing Compound between two SilentFX layers.
STC Gauge
Compare how the SilentFX QuickCut performs across assembly tiers. Select an assembly below to see the resulting STC score.
One layer of SilentFX on resilient channel over Rockwool-filled studs — a clean upgrade over standard 5/8" gypsum.
- STC 30-39: Loud speech clearly audible next room.
- STC 40-49: Loud speech muffled — normal residential wall.
- STC 50-59: Loud speech barely audible; suitable for offices & multi-family.
- STC 60+: Approaches studio-grade isolation.
How SilentFX QuickCut compares
| Model | Layers | Key Elements | Typical STC* | Notes |
|---|---|---|---|---|
| SilentFX + RCthis | 1 × 5/8" | SilentFX board + resilient channel | ~53 | Fast upgrade over standard gypsum |
| SilentFX Double + Green Glue | 2 × 5/8" | Staggered seams, sealed perimeter, Green Glue between layers | ~58–60 | Higher mass + damping: better isolation |
| Standard Type-X Gypsum | 2 × 5/8" | Regular Type-X both sides | ~50–52 | Lower damping vs SilentFX |
Applicable Assemblies
See where the SilentFX QuickCut fits — from budget baseline to studio-grade isolation.
Best — Drywall + Studs + Insulation + Clips & Channels + MLV + SilentFX + Green Glue + SilentFX
1 layer of drywall, 2×4 framing, Rockwool insulation, isolation clips & channels, 1 lb MLV, SilentFX + Green Glue + SilentFX.
Better — Drywall + Studs + Insulation + Clips & Channels + SilentFX + Green Glue + SilentFX
1 layer of drywall, 2×4 framing, Rockwool insulation, isolation clips & channels, SilentFX + Green Glue + SilentFX.
Good — Drywall + Studs + Insulation + Clips & Channels + SilentFX
1 layer of drywall, 2×4 framing, Rockwool insulation, isolation clips & channels, single SilentFX finish layer.
