Maxxon® Commercial Gyp-Fix EZ® Patch is a non-shrinking, high-strength, trowelable patch designed for preparing all subfloors. Maxxon Commercial Gyp-Fix EZ Patch features a smooth consistency and finish that is flooring-ready in as little as 40 minutes. This patch bonds to common subfloors including concrete and gypsum, making it an effective solution anywhere a patch or skim coat is needed.