Design Engineering Silicone tapes, Speed tapes and Shrink tubing are premium quality products that deliver the performance you would expect from DEI. Our Heat Shrink tubing is a high temperature rated with a 3-1 shrink ratio. Quick fix tapes are 100% silicone with tapered sides. They are an exelent product for emergency repairs of hoses or cables. DEI Speed Tapes come in many colors and are a must have for any tool box.