ExBar W 2 Barium sulfate Excalibar Minerals Extenders / Fillers >> Barium Sulfates ADHESIVE SEALANT Tightly controlled, exceptionally pure white barium sulfate used in rubber and plastics, paints and coatings and other filler applications where color and purity are the principle concerns. Excalibar Minerals' White High Purity Barytes products are manufactured from the highest quality natural barium sulfate ore. Our products are processed in our plant in Houston, Texas to control quality and consistency needed for their use in paints, plastics, rubber, adhesives, sealants, caulks and other industrial applications. Barium sulfate. Possesses white color, high quality and very high purity. Used in adhesives, sealants, caulks and other industrial applications. Suits where color and purity are the principle concerns.