P C SEAL (Poly Carboxylate Cement ) use for fixation and lining. It forms a chemical bond with the tooth structure due to an acid -base reaction

COMPOSITION:

Powder:

• Zinc oxide
• Magnesium Oxide

Liquid:

• Polyacrylic acid & water

INDICATIONS:

• Fixation of metal metallo porcelain or composite veneered inlays ,on lays .crown and bridges.
• Porcelain restorations
• Orthodontic bands
• Cavity liner
• Metal crowns
• Metal-ceramic crowns

CONTRAINDICATIONS:

• Titanium based restorations (as cement discolouration occurs)

DISADVANTAGES:

• Low pH initially
• Low resistance to erosion in acidic environment
  • Short working time