4" x 75', white, butyl flashing, tite seal, waterproof, self adhesive flashing composed of our new steel-loc butyl adhesive & a poly-ethylene facing material, aggressively adheres to wood, osb, aluminum, vinyl, house wrap, steel drywall studs & more, can be applied to temperatures as low as 15 degrees without need of primer, impermeable to water, moisture vapor & air, can be used to flash around windows & doors, seal joints in sheathing panels, around vents, & other openings, use under most exterior surfaces including brick, stucco, wood & vinyl or wood siding & can be left exposed for 180 days.