Abstract: A method for caulking or grouting a corner wherein a roll or tape having two double-sided adhesive strips 12 and 12? attached to a backing strip 14 such that adhesive strips 12 and 12? are parallel to one another and are spaced apart forming a uniform, intermediate channel and folded in half, forming an exposed edge of the backing strip is inserted into the corner of a wall, the roll of tape is used as a guide by holding the roll flush against a first wall and unrolled, adhering the outer strip along the entire length of the second wall, then cut and unfolded such that the outer adhesive strip becomes adhered to the entire length of the first wall, forming a uniform channel into which caulk or grout can be applied.