Unit Size Net Weight Quart Kit 2.6 lb Gallon Kit 10.4 lb Five Gallon Kit 45.5 lb EpoxAcast 690 is a clear casting epoxy that is ideal for making clear jewelry/beads or replacement lenses for kit cars and other applications requiring a rigid, clear finished product. EpoxAcast 690 can be colored with UVO and Ignite color tints. EpoxAcast 690 is also suitable for making clear molds and prototype parts. Castings cure with negligible shrinkage and are very hard and strong. EpoxAcast 690 is also suitable for encapsulation applications for electronic assemblies where component identification is necessary. Recommended casting thickness .375in. (.95cm).PropertiesTechnical Properties Casting Thickness < 0.38" Mix Ratio by Weight 100A:30B Mix Ratio by Volume N/A Pot Life 5 hours Cure Time 24 hours Color Clear Shore Hardness 80D Mixed Viscosity 280 cps Shrinkage 0.002 in./in. Specific Volume 25 cu. in./lb. Specific Gravity 1.10g/cc Tensile Strength 6,630 psi Compressive Modulus 91,300 psi Tensile Modulus 572,000 psi Flexural Strength 10,980 psi Flexural Modulus 410,000 psi Compressive Strength 9,610 psi Heat Deflection Temp 115F PAINTING Cured EpoxAcast 650 can be painted and/or primed and then painted with acrylic enamel paints. Let paint fully dry before putting part into service.APPLYING RELEASE AGENT This product is adhesive and will bond to many surfaces. For epoxy to epoxy applications where adhesion is not desired, an application of paste wax followed by Ease Release 2125 PVA. For other surfaces such as metal or plastic, a silicone based spray release such as Universal Mold Release may be used to prevent adhesion.Removing Epoxy Uncured / Non-Curing Epoxy: Scrape as much material as possible from the surface using a scraper. Clean the residue with E-POX-EE KLEENER, lacquer thinner, acetone or alcohol. Follow safety warnings pertaining to solvents and provide adequate ventilation.Castings can be displayed outdoors after painting with an aliphatic urethane clear coat (such as Axalta Imron 3.5 Plus High Gloss Polyurethane Topcoat available at www.axalta.com). Unpainted castings will yellow after being exposed to UV light or excessive heat above 115F/46C. For longer outdoor UV resistance of an unpainted clear part, Smooth-On's Crystal Clear Urethane Resin may be an option for your application.Media Video Video Video Video Video Video Documentation Technical Bulletin Special Order Items PRODUCT ADVISORY: The products listed below are currently SPECIAL ORDER items and require pre order. Lead times may vary - For more information please contact our staff.798317 - EpoxAcast 690 Clear - Five Gallon Kit
