Multiflex

General Info

PRODUCT
Multiflex sealant is a single component, non-sag elastomer, designed for use in most moving and non-moving joints.  It has the following unique properties:
- Gunnable at low temperatures
-  Exhibits immediate adhesion to most building materials, including damp non-porous surfaces
-  Most non-traffic bearing joints, including those where structural movement or stress is expected.
-  Assembly of galvanized air conditioning ductwork
-  May be used primerless on brick, limestone, marble, granite, concrete, ferrous metals, glass, and untreated woods.
-  Where paintability is required
-  Where a non-staining sealant is required

COMPOSITION AND MATERIALS
Multiflex is based on a proprietary, high molecular weight, ethylene copolymer.  Multiflex modifies this specialty resin, producing a system with exceptional adhesion, elasticity, and resistance to tear, shear, stress, and weathering.  More economical than most other high performance sealants.  Multifex is 100% non-toxic when fully cured.  Due to a unique secondary-cure mechanism, its adhesion properties improve with time and weathering, and it exhibits excellent life expectancy.

GRADE:  Gun Grade Consistency

PRIMERS: Not required on most building materials.  Priming may be required with some plastics, weathering steel, treated woods, and some factory-coated metals.  Contact Technical Service Department for further information.

PACKAGING: 318 ml. cartridges, 10 litre cans, 20 litre cans, 45 gallon drums.

COLORS: Grey, White and Clear

APPLICABLE STANDARDS:   Federal Specification TT-S-00230C, Class A,  Type 11  ASTM C-920-79, Type S, Grade NS, Class 25

 LIMITATIONS:  Not recommended for:
-  Traffic-bearing surfaces
-  Heel bead in glazing applications
-  Bituminous surfaces
-  Where food is processed or stored unless sealant is cured at least 14 days at room  temperature, due to solvent release.  Cured material is non-toxic.  Contact Technical  Service Department for specific application.

INSTALLATION
JOINT DIMENSIONS:   For optimum results, joints should be a minimum of 4 times greater than anticipated movement.  Minimum recommended joint size is 1/4″ x 1/4″.  Maximum joint size should be 1″ width by 1/2″ depth.  A width to depth ratio of 2:1 is desirable.

SURFACE PREPARATION:   Multiflex should be applied to surfaces that are free from oil, grease, wax, dust, corrosion, moisture, or any material that may interfere with obtaining optimum adhesion.  Do not use  Xylol or MEK to clean joints or to remove surface coatings, unless surface can be allowed to dry before application of sealant.  If the joint is wet with solvent, the sealant will not adhere properly.  Use of a dry rag or brush to remove dust, dirt or other contaminants is recommended.  Contamination from curing agents  and from releases should be avoided.

JOINT BACKING:   Joint depth should not exceed 1/2″.  An open-cell backer rod such as foam, should be used to control joint depth.  Do not use bitumen-impregnated backing material.  In shallow joints, a bond breaker tape should be installed to prevent three-point contact.

APPLICATION AND TOOLING:   Apply with conventional caulking equipment, filling joint completely. When temperature is below 10 degrees F., application will be easier if sealant is warmed.  Tool immediately after application.  A soap solution or a solvent such as Xylol may be used as a lubricant for tooling.  Do not allow such agents to contaminate open joints.

PAINTING:   Sealant may be painted after 24 hours.  If using a relatively inflexible paint, allow sealant     to cure for 3 days before painting.  Multiflex may be coated with any latex and most oil-based paints.  Best    results will be achieved when sealant is primed with a latex enamel.  Some paints may crack in dynamic joints. See paint manufacturers specifications.

CLEANING:   Remove Multiflex from gun and tools before it cures.  This may be done by scraping and use       of solvents such as MEK (lacquer thinner), Xylol, Toluol or chlorinated solvents.  Cured materials may be removed by cutting with sharp tools or sandpapering.  Observe manufacturer’s precautions when using toxic flammable solvents.

PRECAUTIONS:  Apply with adequate ventilation.  Avoid eye contact.  As supplied, product may be harmful or fatal if swallowed;  do not induce vomiting, contact a physician immediately.

GUARANTEES
Chemtron Manufacturing Ltd. warrants that the product is manufactured according to their published standards and that the product is free from defects.  The company will, at its option, either refund the purchase price of, or provide replacement for, that portion of the Multiflex which fails to perform in accordance with this warranty.  Such refund or replacement will constitute the limit of Chemtrons liability and obligation for any such failure.  Chemtron Mfg Ltd. will not be liable or obligated otherwise for any loss or damage, arising directly or indirectly, from Multiflex or the use or failure thereof, whether based on breach or warranty or negligence.

MAINTENANCE
No Maintenance should be required.  If the sealant is damaged, either remove bead and reseal with Multiflex, or apply additional Multiflex over the damaged area.

TECHNICAL SERVICE
Inhouse technical staff and laboratory facilities are equipped to respond to specific requests for further information and/or applications testing.

TECHNICAL DATA
Specific Gravity (77o F) – 1.12
Viscosity – (Brookfield RV-F-spindle, 100 sec. 77o F)  1.2 MMcps
Flash Point (uncured) – 120o F   
                                                                   

INDEPENDENT LABORATORY TESTING  VALUE  TEST METHOD
Rheological properties:

Vertical slump 

none   TT-S-00230C, ASTM C-920

Horizontal

none    TT-S-00230C, ASTM C-920
Extrusion rate 5 seconds TT-S-00230C, ASTM C-920
Hardness (Shore A) 15 + TT-S-00230C, ASTM C-920
Tack free time 2 hours TT-X-00230-C, ASTM C-920
Stain/Color change/Discoloration no visible change TT-S-00230C,ASTM C-920,TT-S-01543A
Adhesion-in-peel:

Aluminum

17 lbs TT-S-00230C, ASTM C-920

Mortar

12 lbs

Glass

7 lbs

Glass after UV exposure 

20 lbs
Accelerated UV exposure no cracking ASTM C-920
& cold temp. exposure  no cracking ASTM C-920
Elongation at break (72o F) 160% ASTM D-412-68
Water Vapor Transmission 7.34 mg/cm2/24 hrs  ASTM E-96-66, Method BW

WARRANTY, RECOMMENDATIONS FOR USE OF THIS PRODUCT ARE BASED ON RELIABLE TESTS, SINCE DESIGN AND CONDITIONS OF INSTALLATION ARE BEYOND OUR CONTROL.  NO GUARANTEE OR APPLICATION IS IMPLIED.  OUR LIABILITY FOR ANY DEFECT OF THE MATERIAL IS LIMITED TO REFUND OF THE PURCHASE PRICE ONLY.

TDS Sheets