Hybo's foam product series are 100% closed - cell and rigid polymethacrylimide (PMI) foams. They are lightweight, with high specific strength, high specific modulus, high heat - resistance, compression - resistance, corrosion - resistance, good processability, easy adhesion, excellent dielectric properties and high closed - cell ratio. They can be co - cured with high - temperature resins such as epoxy and bismaleimide.