Greenpatch-421 is a 53% alumina air-setting refractory mortar used as a patch for general use. Greenpatch is premixed, and provides a good chemical match to many common brick, castable and plastic linings. It is typically used for general patching applications, but it can also be thinned for brush coating. Patch thickness should be limited to 3" and only considered a temporary fix. Available in a 15 lb and 55 lb pails.
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