CLEARFIL PORCELAIN BOND ACTIVATORis a silane coupling agent, which in combination with SE Bond Primer orCLEARFIL LINER BOND 2VPrimer, CLEARFIL NEW BONDorCLEARFIL PHOTO BONDguarantees a strong adhesion to porcelain and composite restorations. After mixing the liquids one can apply the mixture directly onto the surface to be restored followed by restoring the defect using a composite.