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FLEXI-WELD 520, 520T

HI-MODULUS, 100% SOLIDS EPOXY ADHESIVES

DESCRIPTION:

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.

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: Repairs to granite column bases at the South Carolina State House were performed by rebonding broken stone 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 @ 25C:

5.5 Minutes

17 Minutes

Color:

Clear  Neutral/Off White or Custom Colors

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)

*Compressive Shear Strength for this sample.

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 90F. 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 50 and below 90 degrees Fahrenheit for best results.

Edison Coatings, Inc. Products are manufactured in the United States of America from Components Originating in the United States, Canada, Italy, Germany, Spain, Australia, South Africa and South Korea.
BioLime NHL 3.5 is a product of Italy. Marfil is a Product of Spain.

Copyright 2012, Edison Coatings, Inc. All rights reserved.

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Society for the Preservation of Historic Cements, Inc.

Last Updated:

Wednesday, March 19, 2014

EDISON COATINGS PRODUCTS ARE FOR COMMERCIAL & INDUSTRIAL USE ONLY

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LIMITS OF LIABILITY

Edison Coatings, Inc. makes no warranties, express or implied, as to the accuracy or completeness of any of the information contained herein. This publication is offered on a complimentary basis as a service to potential customers or specifiers. While every effort has been made to include complete and accurate information, based on data and information believed to be reliable, it is the sole responsibility of the user to determine its suitability for his own intended use and purposes. Nothing contained herein shall be construed as a warranty or guarantee of any product, process or any other recommendation stated herein. Edison Coatings, Inc. assumes no responsibility for advice given, results obtained, or for any damages whether incidental or consequential, which may be incurred as a direct or indirect result of the use of this information. By proceeding to use this information, user acknowledges and agrees that he is doing so at his own risk, and user indemnifies and holds Edison Coatings harmless against any liabilities, costs or expenses resulting therefrom. All product sales are further governed by the Edison Coatings, Inc. CONDITIONS OF SALE.