Tough, resilient, glass syntactic polyurethan elastomer designed for thermal insulation to subsea oil wells, pipelines, and associated subsea equipment environments, suitable for use on hot pie up to 165 Deg. F and under extreme pressure up to 4000 psi in depths up to 9000 feet at seawtaer temperatures at 34 Deg. F., ideal where a flexible, non-cracking thermal insulation is preffered to provide flow assurance