Love that movie and also I believe it was Steve McQueen’s first movie.
Love the theme song to the Blob:
https://www.youtube.com/watch?v=XzHDvzGmmw0
Beware of the blob, it creeps
And leaps and glides and slides
Across the floor
Right through the door
And all around the wall
A splotch, a blotch
Be careful of the blob