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Master Bond adhesives

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Gougeon Brothers West System® 105 Epoxy Resin® / 207 Special Clear Hardener™
Categories: Polymer; Thermoset; Epoxy

Material Notes: 105/207 Epoxy is used for coating and fiberglass cloth application where an exceptionally clear, moisture-resistant, natural wood finish is desired. 105/207 is blush free and will not turn cloudy in humid conditions. Thin film applications roll out and tip off smoothly, requiring less sanding in preparation for finish coatings. Three coats or more can be applied in one day without additional surface preparation. Fewer coats are required to fill fiberglass weave and in most cases the final coating can be sanded the following day. 105/207 forms a high-strength, moisture-resistant solid with excellent bonding and barrier coating properties and is used as a structural adhesive for gluing and laminating. It has excellent compatibility with paints and varnishes. An ultraviolet inhibitor in 207 helps provide a beautiful, long lasting finish when used with quality UV-filtering varnish. It is formulated without volatile solvents resulting in a very low VOC content. It has a relatively high flash point, no strong solvent odor and does not shrink after curing.

Information provided by Gougeon Brothers, Inc.

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.15 g/cc
Viscosity 760 cPMixed; ASTM D-2393
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 84.4ASTM D-2240
Tensile Strength 6750 psiASTM D638
Elongation at Break 3.8 %ASTM D638
Tensile Modulus 440000 psiASTM D638
Flexural Strength 11300 psiASTM D-790
Flexural Modulus 412000 psiASTM D-790
Compressive Yield Strength 11000 psiASTM D-695
 
Thermal PropertiesOriginal ValueComments
Deflection Temperature at 0.46 MPa (66 psi) 117 °FASTM D-648
Glass Transition Temp, Tg 116 °FOnset
 116 °FUltimate
 
Processing PropertiesOriginal ValueComments
Cure Time 10.0 - 15.0 hoursolid, thin film
 24.0 - 96.0 hourworking strength
Pot Life 22.0 - 26.0 min100 g
Working Life 110 - 120 minThin film
 
Descriptive Properties
Mix ratio3 parts resin: 1 part hardenervolume, 300 Mini Pump ratio
 3.64 : 1weight

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PGOUGW904 / 290748

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