Crack filler is a type of material used to fill in cracks and holes in walls, floors, and other surfaces. PUTTY (5 letters), CAULK (5 letters), Spackle (7 letters), GROUT (5 letters), TAR (3 letters), and ALE (3 letters) are all types of crack filler. PUTTY is a soft, pliable material that can be used to fill in small cracks and holes. CAULK is a type of sealant that is used to fill in larger cracks and gaps. Spackle is a lightweight material that is used to fill in small holes and cracks. GROUT is a type of cement-like material that is used to fill in the gaps between tiles. TAR is a thick, sticky material that is used to fill in large cracks and holes. ALE is a type of liquid sealant that is used to fill in small cracks and holes.