Protection from Gamma emitting isotopes such as 125I, 133Xe, 57Co, 99Tcm, 123I and 67Ga has, until recently, been achieved by lead shielding. This has its obvious disadvantages, being very heavy and nontransparent. However, a new lead containing acrylic copolymer resin is 30% wt/wt and is chemically introduced into the acrylic resin as an organolead salt. This material is transparent with a very light brown tint and it exhibits virtually all the normal chemical and physical properties of conventional acrylic resin. Scie-Plas Limited provide a range of products using 12mm thick lead-acrylic, which is equivalent to 0.5mm thick lead. This range of products effectively blocks Gamma emissions from 125I and any Gamma emitters of lesser energy. It is NOT suitable for use with more energetic isotopes of iodine. However, a 35mm thick shield is available which is equivalent to 1.7mm thick lead. This can be used with isotopes of higher energy.