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5MD Medium Density Gypsum Based Fireproofing
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Descriptions

Southwest Fireproofing Type 5MDTM is the higher density and strength version of the classic non-combustible vermiculite and gypsum combination used in our other Type 5TM products.

Specific Uses

Type 5MDTM is designed for use in all areas requiring a medium density product where gypsum plaster or wallboard could also be used as construction materials. Type 5MDTM is listed in all UL Fire Resistive Designs listing either    Type 5GPTM or 5EFTM.

Benefits

Type 5MDTM is the most applicator friendly medium density fireproofing product. It also sets quickly without extended cure times to give indefinite interior service expected from gypsum plaster products.

Type 5MDTM is cost effective because it is priced competitively and is simple and easy to install. The installed material is strong, durable and reliable, with physical properties that meet or exceed industry standards as shown in the data table below.

Applications

Type 5MDTM is used in medium density service conditions as shown in the Selection Chart.

                                                                           

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Mechanical rooms
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Elevators shafts
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Enclosed parking areas
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Other exposed areas

TYPE 5MD CEMENTITIOUS FIREPROOFING IS SPRAY-APPLIED TO STRUCTURAL COMPONENTS OF BUILDINGS FOR FIRE RESISTANCE. UNDERWRITERS LABORATORIES FIRE TEST RESULTS HAVE QUALIFIED IT FOR USE IN OVER 100 DESIGNS.  UL DESIGN PAGE

TYPE 5MD CEMENTITIOUS FIREPROOFING IS DERIVED FROM THE BENEFICIAL COMBINATION OF GYPSUM AND VERMICULITE. IT IS NON-COMBUSTIBLE AND UNDER FIRE, IT RELEASES WATER OF CRYSTALLIZATION WHICH TURNS TO STEAM AND RETARDS HEAT TRANSFER. TYPE 5MD HAS A CONTROLLABLE QUICK SET TIME WHICH EXPEDITES APPLICATION. THEREFORE, GYPSUM HAS ADVANTAGES OVER OTHER CEMENTS AS THE BINDER IN CEMENTITIOUS FIREPROOFING.

PHYSICAL CHARACTERISTICS

Specific values listed from laboratory testing of samples prepared and tested in accordance with the procedure designated.

Results on field applied material may vary.

Physical Characteristics of Type 5MDTM

Property and Test Method

Value / Result*

Density, ASTM E-605

22 pcf (400 kg/m3) min. avg.

Combustibility, ASTM E-136

Passed, non-combustible

Compressive Strength, ASTM E-761

16,978 lb/ft2 (813 kPa)

Cohesion/Adhesion, ASTM E-736

1,268 lb/ft2 (60.7 kPa)

Effect of Impact, ASTM E-760

Passed, no spalling, cracking or delamination

Effect of Deflection, ASTM E-759

Passed, no spalling or delamination

Corrosion of Steel, ASTM E-937

Passed, no contribution to corrosion

Erosion by Air, ASTM E-859

Passed, 0.000 g/ft2 (0.00 g/m2)

Surface Burning, ASTM E-84

Flame Spread 0, Smoke 0

DOD Classification, ASTM E-1042

Type 1, NRC 50, class (a), Category A

Fire Resistance, ASTM E-119

Passed, see UL DESIGNS

Fungi Resistance, ASTM G-21

Passed, no growth with optional fungicide

* Values are from laboratory tests under controlled conditions and not intended to replace industry standards for specification purposes.

              

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                       Last modified: 9/23/2008