sealer vs sealing material

sealer and sealing material both are nouns.

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

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

sealer: a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)
sealing material: any substance used to seal joints or fill cracks in a porous surface

sealer (noun)	sealing material (noun)
an official who affixes a seal to a document	any substance used to seal joints or fill cracks in a porous surface
a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)