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Master Bond adhesives

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Reynolds Forton® MG Additive
Categories: Polymer; Thermoset; Silicone; Silicone Rubber

Material Notes: Product Overview: Forton® MG is a four component system which consists of an alpha gypsum blended with three specialty additives. The additive system is based on the VF-812 water based polymer emulsion (50% solids) and greatly enhances the physical properties of alpha gypsum products. VF-812 drastically reduces water permeability, making it suitable for both interior and exterior applications (for exterior use, product must be sealed – see “Finishing” section). The Forton® MG system is easy to use and can be cast solid, rotationally cast, layed up by hand with glass fiber or sprayed. Fully cured pieces can be painted, sanded, machined and polished. Forton® MG is used to make lightweight pieces that are very strong and water-resistant. Applications include making architectural elements, reproducing sculpture and special effects. Vibrant colors are possible by adding pigments. Metal powders (bronze, copper, brass, etc.) can be added to give the look of real metal castings at a fraction of the cost. You can duplicate the look of marble or ceramic by adding inexpensive fillers. The Forton® MG system meets ASTM E-84, Class A (or 1) flame rating for building materials.

Information provided by Reynolds Advanced Materials

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.52 - 1.60 g/cc
Water Absorption 0.80 %after 24 hour water soak
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Ultimate 3500 - 5100 psi
Flexural Strength 3500 - 9400 psiUltimate
Compressive Strength 6000 - 9000 psi
Tensile Impact Strength 170 ft-lb/in²ASTM D256
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 93.0 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 1.00 - 1.50 hourDemold
 20.0 - 30.0 minWorking
 
Descriptive Properties
ColorBright White
Freeze/Thaw Resistance300 cycles
Water Vapor Diffusion Coefficient250 mµ

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PREYN316 / 297017

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