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FLEXI-WELD 520, 520-T DESCRIPTION:
FLEXI-WELD 520 is a low viscosity, high strength adhesive, which may be pressure-injected, gravity fed, or mixed with fillers and tooled onto bonding surfaces. FLEXI-WELD 520-T contains thixotropic additives to allow application on vertical and overhead surfaces. The system also has the capacity to accept additional mineral fillers, such as silica or crushed stone, to permit the preparation of toppings or thick section adhesives. PHOTO: Damaged granite column bases at the South Carolina State House were repaired by rebonding broken fragments with Flexi-Weld 520T. PROPERTIES:
520 520-T Mix Ratio, By Volume: 3:1 8:1 Viscosity, Mixed, cps:
700 - 1,700 cps
3,000 - 7,000 cps
Gel Time, 100g @ 250C:
5.5 Minutes 17 Minutes
Color: Clear Neutral/Off White or Custom Colors PERFORMANCE:
Tensile Strength: 10,200 psi % Elongation: 4.0% Flexural Strength, Approx. 15,000 psi Compressive Strength 12,9000 psi ADHESIVE STRENGTH DEVELOPEMENT:
Substrate Surface Preparation Tensile Shear Strength Concrete, Dry None >900 psi (Concrete Failure)**
Concrete, Damp None >900 psi (Concrete Failure)** C.R. Steel Solvent Wipe 2,200 psi Aluminum Solvent Wipe 2,000 psi Aluminum Acid-etched 2,900 - 4,200 psi Concrete, Damp, to Steel None >300 psi (Concrete Failure) APPLICATION: Apply to clean damp or dry surfaces free of dust, dirt, grease, oil, coatings or other extraneous material which may hinder adhesion. Concrete and masonry surfaces may be smooth or rough, damp or dry, but must be sound and clean and free of laitance, efflorescence, curing compounds or other contaminants. 520: Small repairs and crack filling by gravity are most easily performed using 24 oz. pre-measured units of FLEXI-WELD 520. Pour the contents of the bottle of Hardener (Part B) into the short-filled bottle of Resin Part A). Thoroughly mix the two 520 components by alternately inverting and righting the container for 1 minute, or using hand tools. When using larger units, mix in small quantities, as will be applied in 3-5 minutes. Allow material to flow completely along container sides and from top to bottom to assure complete blending of all materials. Pressure injection equipment for 520 should be fitted with disposable static mixer to prevent damage to pump due to fast setting characteristics of product. Perform pressure injection work in accordance with standard industry procedures. 520-T: Mix the 520-T components for 2 minutes using slow speed drill. Scrape container sides and bottom to assure complete mixing. Spread the mixture over the surface to be bonded and immediately place the piece to be bonded in contact with the adhesive. Maintain light pressure during cure to achieve the best bond. Immediately remove any runs or excess adhesive using FLEXI-THIN 597 or Xylene. TEMPERATURE: Temperature of product and substrates affect cure rate. Low temperatures increase viscosity and slow cure. High temperatures reduce viscosity and accelerate cure. Minimum application temperature is -50F. Maximum temperature is 900F. At temperatures above or below this range, ask your Edison Coatings Technical Representative for alternative formulations intended for use under extreme conditions. SAFETY & HANDLING: WARNING: Hardener is a Corrosive Liquid (Skin). Avoid skin and eye contact. Use protective gloves, goggles and clothing as required to prevent contact. Use with adequate ventilation. Do not use in areas where food products are stored, unless first removing all materials which may absorb product vapor. Read and observe all safety and handling guidelines as detailed in the Material Safety Data Sheets supplied with this product. Store above 500 and below 900F for best results. |
FLEXI-WELD 520 and 520-T are two-component, moisture insensitive, high strength 100% solids epoxy adhesives for general
purpose bonding to a wide variety of substrates. Suitable substrates include dry or damp concrete, steel, aluminum, glass, polystyrene and polyvinyl chloride, with proper preparation. 
