250-350F (121-177C) curing, low-density, expandable product designed for the purpose of filling mismatched areas and for splicing and reinforcing honeycomb core. High performance over the -67F to 250F (-55C to 12C) temperature range when cured at 250F. High performance over a -67F to 350F (-55C to 177C) temperature range when cured at 350F (177C).