Developed specifically for forensic applications, AccuTrans Transparent Casting Silicone eliminates reverse prints and allows for direct comparison of minutia points. This polyvinylsiloxane material offers high tear-resistance and dimensional stability. AccuTrans prints are permanent on the lift, will not smudge and are preserved indefinitely. This material is flexible, accurate and ideal for rough surfaces, such as bricks, Styrofoam and even human skin. AccuTrans, from Ultronics Inc., is ideal for curved surfaces, such as bottlenecks. Ridge detail is excellent on all surfaces, and the material is self-pooling for optimum coverage. Non-toxic AccuTrans has a shelf life of up to 2 years and sets in only 4 minutes at 68 degrees Fahrenheit.