Clear - Forms a barely visible water-tight seal. White - Designed for high moisture, indoor/outdoor applications. Blue - Heavy duty industrial gasket sealant. Red - High temperature, low odor, non-corrosive gasket sealant. Seal, bond, waterproof and protect. Cure at room temperature - no special curing methods required. The chemically stable formulations show little change in physical properties after exposure to rain, snow, temperature extremes and weathering.