* Color may vary. Features: - Impression Compound is a Thermoplastic Impression Material indicated for full or partial impressions, copper band impressions or for adding to the periphery of an impression tray. Impression Compound is available in cakes and sticks and in three colors, signifying softening temperatures: - Soft green : 122-124°F. - Grey : 128-130°F. - Red : 132-133°F.