A method for caulking or grouting a corner involving providing a tape with two strips of adhesive tape, the strips being spaced apart such that a channel is formed therebetween. A non-adhesive dividing strip is attached to the strips. The strips are folded along the centerline of and rolled upon a cylindrical core (16). The roll is placed against one wall with the folded edge inserted into the corner. Using the roll as a guide the tape is unrolled along the corner by moving the roll along the corner, progressively unrolling tape from the roll and unpeeling the dividing strip. After the tape is in place, caulk or grout is applied in the channel between the adhesive strips.