ALLPRO GOLD™ High Performance Sealant - Advanced technology with a lifetime warranty. Ideal for the quality conscious builder because it withstands sheer movement and adheres to hardboard siding, pressure treated lumber and bare aluminum ... plus glass and concrete. It is excellent for expansion and control joints. Withstands 500% elongation with 98% memory and meets the performance requirements of TTS-00230-C, Type II, Class A and ASTM C-920. Microscopic air has been removed from this product to assure maximum gunability.