The product in your hand is Foster 95-44 Elastolar Sealant. It is mainly used as a sealant and protective coating for insulation systems.
What it is used for:
* Sealing joints, gaps, and seams on insulation
* Protecting HVAC ducts and pipes
* Waterproofing insulated surfaces
* Preventing air leakage and moisture penetration
* Used on aluminum jacketing and insulation coverings