| # | May 18 Retest | Manufacturer | Product | Thickness | IIC (Lab) | IIC (Tested) | Notes | Concern | Price / sq ft | Link |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ✗ | Dura Cushion | Duracoustic® 8mm | 8 mm | 92 | — | Versatile, multi-surface acoustical underlayment. IIC 92 on 6″ concrete slab with suspended ceiling. | IIC value based on carpet, and must be glued | Quote requested May 2026 |
Product page ↗ |
| 2 | ✗ | Dura Cushion | Protector™ 5mm | 5 mm | 81 | — | IIC 81 per ASTM E90 / E492. Tested with carpet. | IIC value based on carpet, and must be glued | Quote only | Product page ↗ Spec sheet ↗ |
| 3 | ✗ | Second Skin Audio | UnderBlock™ Rubber Flooring Underlayment | 5 mm | 57 | — | Available now at retailer | ~$1.67 | Product page ↗ | |
| 4 | ✔ | MP Global | Quiet Board | 6 mm | 72 | 49 | QuietBoard retail size 2′ × 3′ · SKU QBOARD23 | ~$1.36 | Product page ↗ Spec sheet ↗ |
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| 5 | ✔ | Pliteq | GenieMat® RST05 | 5 mm | 50 | 51 | 94% recycled rubber · 120 sf/roll · SKU GERST05 · ΔIIC 22dB · HIIC ≥ 62 (vinyl on 8″ slab) | IIC 50 tested with tile, no ceiling | ~$1.45 | Spec sheet (PDF) ↗ Product page ↗ |
| 6 | ✔ | MP Global | Quiet Walk | 3 mm | 59 | 51 | IIC varies by assembly: 55 (laminate · 6″ concrete slab · no ceiling) · 60 Field IIC (laminate · no ceiling) · 68 (laminate · suspended gypsum board) · 71 (laminate · with ceiling assembly) | IIC range is assembly-dependent; 55 is worst-case concrete/no ceiling | Spec sheet (PDF) ↗ Product page ↗ |
|
| 7 | ✗ | Foam Products Corp. | Eclipse II | 1.8 mm 0.070″ |
— | 51 | Closed cell EVA foam · Moisture barrier · GreenGuard Gold (UL 2818) · Antimicrobial · Radiant heat compatible · Floating only · No recycled content · Lifetime warranty · Made in USA | Very thin (1.8 mm); no lab IIC on file | ~$0.30 | — |
Prices sourced from manufacturer / retailer websites · as of May 2026 · subject to change