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EXACOR™ Underlayment

EXACOR™ underlayment panels are specifically engineered to meet the fire-rating[1], sound-rating[1] and dimensional stability requirements of most multifamily and light commercial jobsites. Made of magnesium oxide and an integrated mesh core, EXACOR underlayment panels are fire resistant[2]. In addition, EXACOR underlayment panels can offer a base for floor coverings that can eliminate the need for gypsum underlayment and the jobsite delays that may come with it.

  • Underlayment Panel, 1/2" × 4' × 8'

  • Underlayment Panel, 1/2" × 4' × 9'

  • Underlayment Panel, 1/2" × 4' × 10'

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01 Products

Underlayment Panel, 1/2" × 4' × 8'

Panel Count 38
Fire Resistant E84

Underlayment Panel, 1/2" × 4' × 9'

Panel Count 33
Fire Resistant E84

Underlayment Panel, 1/2" × 4' × 10'

Panel Count 32
Fire Resistant E84

Performance Category

Panel Size

Edge Profile

Fire-Resistant Assemblies

Code Evaluation Report

Approx. Weight Per Panel

Panels Per Unit

Nominal 1/2" Thickness (12 mm)Nominal 4' × 8' (1220 mm × 2440 mm)Straight (Square) EdgeUL L528ESR-475086.4 lbs.38
Nominal 1/2" Thickness (12 mm)Nominal 4' × 9' (1220 mm × 2743 mm)Straight (Square) EdgeUL L528ESR-475097.2 lbs.33
Nominal 1/2" Thickness (12 mm)Nominal 4' × 10' (1220 mm × 3048 mm)Straight (Square) EdgeUL L528ESR-4750108.0 lbs.

32

02 Why It Works

  1. A Simple Solution for Sound Control

    When used as part of a STC/IIC-tested floor/ceiling assembly, EXACOR underlayment panels installed over plywood or OSB subfloors can also help provide the fire and sound ratings you need for your build.

  2. Installation Speed & Ease

    Unlike gypsum underlayment assemblies that require cure time that can slow or halt construction progress, EXACOR underlayment panels installed over plywood or OSB subfloors allow construction to continue without delay.

  3. High Quality

    Manufactured in a quality-controlled environment to maintain product consistency you can depend on.

04 Warranty

Warranty Information

See our 10-Year Limited Warranty.

View Warranty