Things You'll Need

Instructions

1

Cut a two equal strips of duct tape. Apply one to the interior of the torn canvas and the other to the exterior side. This quick-fix method works best on small tears.
2

Obtain a fabric swatch from a VW dealer, a fabric shop that deals in canvas or a sailmaking shop. Cut the fabric in two equal lengths of the tear plus another inch on all sides. Apply waterproof glue to one piece and apply to the interior of the tear. Let dry according to the manufacturer's directions. Repeat the gluing process, using the second piece of fabric, on the exterior of the tear. Allow to dry per the manufacturer's directions.
3

Cut canvas the length of the tear plus another 2 to 2.5 inches on all sides. Fold all edges 1.5 to 2 inches under the canvas. This will interlock the ragged edges and form a watertight seal. Have someone place his or her palm or hold a book against the interior side of the tear to provide a flat work surface. Place the piece over the exterior of the tear and secure with backstitches.