Size:1.6” x 120”Inch-3M Silicone Scar Tape. Silicone Scar Sheets is water resistant, flexible and washable. Whether you've had a scar for days or decades, diminish its appearance and reclaim your skin in as little as 4-8 weeks. Each sheet is self-adhesive and durable for up to 7-10 days. Individual results will vary. What Types of Scars to Use On Silicone Scar Sheets works to diminish the appearance of hypertrophic scars and keloids, which have a raised and/or discolored appearance. These types of scars may result from surgery, injury, burns, cuts, insect bites, c-sections and more. Also works as an acne scar treatment. When to Start Using. Begin using scar sheets as soon as the skin is healed and there is no oozing or crusting in the area. Treatment with silicone scar sheets for post-surgical scars may typically begin 1-2 weeks after stitches are removed or when cleared by a physician or surgeon for use. For existing scars, begin using silicone scar sheets right away, provided the skin is fully healed.