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Waterproof Expansion Joints
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Low-pressure colorable rubber seal for expansion joints in vertical applications.

A vertical silicone surface seal combined with a closed-cell copolymer ethylene vinyl acetate foam rubber seal provides an economical alternative to more expensive self-expanding foam seals. Architectural applications include - brick, block, concrete, window-walls, metal panels and the like.

A security seal that combines a vandal and pick resistant primary surface seal with microcell self-expanding impregnated foam. Ideal for school buildings, day care facilities, hospitals, mental institutions, prisons, etc.

Self-expanding foam seal with chemical resistant polysulfide rubber seal provides both a waterproof and a chemical resistant shield. Very effective in waste water applications, potable water tanks, clean-rooms, spill guards, food storage and chemical plants.

Silicone sealant factory-applied to self-expanding micro-cell polyurethane foam impregnated with a waterproof acrylic polymer-sealing compound.

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.

Designed for expansion joint openings with the ability to provide a smooth and virtually impact-free transition between opposing floor surfaces in addition to accommodating heavy rolling loads and multi-directional seismic movement.

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.

Insulated Vapor Barrier

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.