Ultra-Bond is a great product, it's easy to clean up and has great strength.
Dr. RG
Ultra-Bond Plus Resin Cement Techniques
The only dual cured restorative porcelain cement proven to last for 20 years
Use the CeriSander (ultra-fine grit) to further smooth the interproximal surfaces. It is important that you use each sanding blade only two or three times to open contacts.
