External Frame Sealant is a high quality acrylic based sealant that provides a long lasting, permanently flexible seal that can be overpainted when cured. Do not apply External Frame Sealant at temperatures below 4°C. Application Temp. Range 4°C to 40°C External Frame Sealant should be at room temperature when you begin using the product. If External Frame Sealant has been stored in cool conditions it should be placed in a warm room / bucket of warm water before use to gently heat up to working temperature.