filler vs sealing material

filler and sealing material both are nouns.

Word	Noun	Adjective	Verb	Adverb
filler	Yes	No	No	No
sealing material	Yes	No	No	No

As nouns, sealing material is a hypernym of filler; that is, sealing material is a word with a broader meaning than filler:

filler: used for filling cracks or holes in a surface
sealing material: any substance used to seal joints or fill cracks in a porous surface

filler (noun)	sealing material (noun)
the tobacco used to form the core of a cigar	any substance used to seal joints or fill cracks in a porous surface
anything added to fill out a whole
copy to fill space between more important articles in the layout of a magazine or newspaper
100 filler equal 1 forint in Hungary
used for filling cracks or holes in a surface