There is one kind of tungsten silicone-based shielding product, that made with tungsten, iron, bismuth or mixtures of these metals. The advantages of tungsten silicone-based shielding are base on the good performance of tungsten, iron, and bismuth. Tungsten silicone-based material offers the ability to put the shielding as close as possible to the source. In situations where space is limited, tungsten allows for the highest attenuation with the lowest shielding thickness and excellent radiation absorption.http://www.td-tungstenshielding.com/