For the sewline riolis sewline water-soluble fabric glue pen fab50012. Easy to use: to extend glue stick hold the fluted grip and turn the barrel clockwise. Lightly press glue stick to edge of fabric and guide along length. Press down the top fabric to adhere the two pieces. Always replace cap to avoid the glue stick drying out. Easy to refill: hold the fluted grip and turn barrel to expose the white base cap of the glue stick remnant. Pull this cap from its holder and simply push on the new glue stick. Turn barrel anti-clockwise to retract. Note: always test glue on a swatch of the fabric to be sure it reacts satisfactorily. ======fabric glue pen refill (disappearing color) Hold the fluted grip and turn pen barrel to expose the white base cap of the glue stick remnant. Remove protective sleeve. Turn the barrel anti-clockwise to retract new glue stick.