3M ScotchCast Plus Casting Tape 3" x 4 Yards, White, Single Roll Water-activated resin lets you control working time according to application needs. High and early strength allows for weight bearing in 20 minutes and provides a durable cast with less chance of breakdown and the need for costly repairs or replacements. Lightweight for easy mobility. Stretches to conform well to contours for a more comfortable, better fitting cast. Porous weave allows the skin to breathe.