Home and Garden What does Marsh bellofram do? What does Marsh bellofram do? Bellofram Silicones This industry leader manufactures sponge and solid rubber in a variety of shapes and sizes, partnering with product designers to transform silicone into custom engineering solutions. Related Posts:Is medical grade silicone the same as food grade silicone?What paint will stick to silicone caulk?Does silicone foam absorb water?Why Are silicone utensils better?