Silicone gel is called non dry silicone rubber and super soft silicone rubber too, because the surface is sticky after curing, so people call it sticky silicone, jelly silicone, jelly gel or undry silicone too, this is the difference between silicone rubber and silicone gel. Because of silicone gel's sticky characteristic, silicone gel is a excellent material for healing hepa air filter, or potting electronics with waterproof characteristic, as well as a perfect material for making silicone gel finished products which require gel like feature.