The prayers that accompany this sacramental are given in this post.
A Blessed and Holy Epiphany to you all.
V. Our help is in the name of the Lord
R. Who made heaven and earth
V. The Lord be with you
R. And with thy spirit
Bless + O Lord God, this creature chalk to render it helpful to men. Grant that they who use it in faith and with it inscribe upon the entrance of their homes the names of thy saints, Caspar, Melchior and Baltassar may through their merits and intercession enjoy health of body and protection of soul. Through Christ our Lord. R Amen