EpoxAcast 690 Clear

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).

Technical 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.

RIVER TABLE TUTORIAL Using EpoxAcast 690 Clear Epoxy
HOW TO MAKE AN EPOXY TABLE WITH WOOD INLAYS Using EpoxAcast 690 Clear Epoxy

Technical Bulletin