NexaGuard is Cover Up LLC’s line of Magnesium Oxide (MGO) sheathing boards. Unlike OSB, plywood, or gypsum, MGO panels are mineral-based, which means they don’t rot, warp, or absorb moisture. They’re non-combustible, resistant to mold and pests, and built to last through the full life of a structure. Use them for exterior wall sheathing, subflooring, or underlayment.
Key Benefits
MGO sheathing outperforms traditional materials on every front. Here’s what you get:
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Denser than OSB, plywood, or gypsum, with better rigidity for the life of the building.
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NexaGuard boards are non-combustible with a Class A fire rating.
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Rated for 180 days of weather exposure, far longer than gypsum-based alternatives. No moisture = No Mold
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The mineral composition resists mold, mildew, and insects naturally.