Silicone gel dressing in its packaging. Silicone gel dressings are used because the gentle pressure they apply on a wound prevents the formation of keloid scars (enlarged, itchy scars). It is also used on sensitive wounds, as it provides a soft surface that can be easily removed without damaging the wound. Silicone is an inert substance that will not irritate the body. For this type of dressing in use on a breast wound, see image M590/445.