MM Systems Corporation

Multi-directional movement capabilities for critical seismic applications such as hospitals, corridors, and base-isolated structures.


	Founded in 1960, MM Systems offers an exterior line of waterproof, fire-rated, thermal and seismic expansion joint systems meeting the rigorous demands of parking structures, stadiums and plaza decks. Our total "engineered solutions approach" provides design and installation support to architects, engineers, and contractors.

Engineered silicone sealant factory bonded to a rectangular polyurethane backer support system.

MM Seismic Specialty Systems are engineered to provide safe, fire-rated passage between structures before, during and after seismic events.

Fire barrier systems with thermal, seismic and lateral shear capability.

A flexible rubber membrane supported by closed cell foam rubber bellows with integral metal flanges providing a weatherproof roof joint system.

Aluminum centering-bar systems accommodate thermal and seismic movement ranges while providing moisture resistance and load resistance.

Surface mount systems do not require costly block-outs and are available in a wide range of size and movement ranges.

Vertical watertight seismic seal snap-locked into two aluminum frames.

Engineered wall covers provide seismic movement in a wide range of sizes, style and finishes.

ADA-compliant styles accommodate thermal and seismic movement while eliminating problematic bumps.

Engineered floor cover systems provide seismic movement capability, durability and a wide range of size and style combinations.

Durable, heavy-duty designs are engineered for punishing load environments while providing a variety of frame styles and movement capabilities.

Architectural aluminum wall and ceiling systems are available in a wide variety of materials, finish options and movement ranges.

Hidden sight line design blends inconspicuously with adjacent construction while providing high load, high movement capabilities.

Cover systems feature variable pocket frames and receivers to accommodate center slides.

Architectural aluminum frames with Elastoprene® seals in designer colors provide generous movement ranges without sacrificing appearance.

Single and dual flush-gasketed systems provide needed movement ranges in flat, no-bump applications in a wide range of decorator colors. :

Single and dual flush-gasketed systems provide needed movement ranges in flat, no-bump applications in a wide range of decorator colors.

Founded in 1960, MM Systems offers an architectural line of thermal, seismic, waterproof and fire rated expansion joint systems meeting the aesthetic and structural demands of airports, hospitals, shopping malls and other building types. Our total "engineered solutions approach" provides design and installation support to architects, engineers, and contractors.