Private equity-backed International Fiber Corp. has purchased Fibred for an undisclosed amount.

Fibred, headquartered in Cumberland, Md., makes dietary soy fiber used in baked goods, meats, cereal, dairy products and health foods. The company’s products are sold under the trade name FI-1 Soy Fiber.

North Tonawanda, N.Y.-based International Fiber makes insoluble fiber products used to thicken paints and strengthen rubber. The acquisition will add new products to the buyer and expand International Fiber’s manufacturing capabilities.

International Fiber is backed by New York private equity firm Arsenal Capital Partners. The firm invests in middle-market specialty industrial and health care companies. Arsenal has about $1.7 billion in committed capital under management. In July, the firm closed a deal for Adco Global Inc. In May, Arsenal closed an $875 million fund.