worker applies the glue to thermal isolation material, styrofoam with spatula

39aph39 adhesive affix applies apply applying attach building cement civil coating construction craftsman energy engineering glue hand heat insulate insulating insulation insulator isolation layer manually mason masonry material mineral mix mixture mortar plasterer plastering polystyrene polyurethane porous protection quadratic s saving site smear spatula spread structure styrofoam supply surface thermal thermo tool trowel view white work worker