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Today’s window and door designs demand a competitively priced seal with low closing forces and long-term resiliency that will provide protection against short term and long-term air and water infiltration. Ultrafab's Multi Hollow Bulb is the answer. During the early stages of compression, the MHB seal requires minimal force. At the later stages of compression, the outer bulb makes contact with the inner bulb and closing forces build rapidly to provide excellent sealing pressure against the mating surface. This high level of sealing pressure is what makes the seal extremely effective against air and water infiltration.
Ultrafab's MHB sealing technology lost the least amount of functional height when compared to all other commonly used sealing options now on the market. All MHB seals come with the newly designed slip coat feature. This new technology allows for an EXTREMELY low co-efficient surface. Multiple profiles, colors, and backing options available.