STIMEX Seam-Sealer is an excellent product to assure waterproof seams of tents, rucksacks, rain suits, etc.
STIMEX SEAM SEALER WITH APPLICATOR BRUSH FOR USE ON THE INSIDE OF THE SEAM
Directions for use: Make sure that the seams to be treated, are clean and dry. Apply the STIMEX Seam-Sealer on the inside of the canvas. This will prevent discoloration due to UV radiation. Repeat if necessary. STIMEX Seam Sealer leaves a permanently visible protection layer.
Advise: Do a little test first on an unobtrusive part of the seam. Storge life: 12 months in sealed packing.