sealing material(n = noun.substance) - any substance used to seal joints or fill cracks in a porous surface;
is a kind of material, stuff
has particulars: sealant, sealer, filler, lute, luting

abrasive material, absorbent material, adhesive material, adsorbent material, animal material, bedding material, building material, coloring material, colouring material, combustible material, composite material, contrast material, covering material, create from raw material, fencing material, insulating material, material, material body, material breach, material possession, material resource, material witness, packing material, paving material, photographic material, piece of material, plant material, promotional material, radioactive material, raw material, reading material, roofing material, sealing, sealing wax, semiconducting material, sorbent material, upholstery material, waste material, waste of material, written material