Information About DESCRIPTION Dow Corning 730 …

1 Information AboutDow Corning 730 Solvent ResistantSealantTypeOne-part, general-purposefluorosilicone rubberPhysical FormNonslumping pasteCureAcetoxy; on exposure toatmospheric moisture; gives off asmall amount of acetic acidSpecial PropertiesResists swelling upon exposure tofuels, oils and solvents over a widetemperature rangePrimary UsesBonding, sealing and caulkingapplications where resistance tofuels, oils and solvents is requiredDESCRIPTIONDow Corning 730 Solvent ResistantSealant is a ready-to-use, solventless,nonslumping fluorosilicone rubberpaste that reacts with moisture in theair to form a tough, rubbery solid. It isa fluid- resistant material that is ideallysuited for use in many applicationswhere resistance to fumes, splash, andsometimes even total immersion infuels, oils and solvents is Corning 730 Solvent ResistantSealant features good resistance toweathering, vibration, moisture, ozone,and temperature extremes. It retainsits flexibility over a wide temperaturerange from -85 to 500 F (-65 to 260 C).

2 Dow Corning 730 Solvent ResistantSealant can be applied overhead or onvertical surfaces without fear ofsagging, slumping or running Corning 730 Solvent ResistantSealant is used primarily for bonding,sealing and caulking applicationswhere resistance to the swelling effectsof fuels, oils and solvents is needed. Itcan be used for assembling and/orrepairing the fuel lines and tanks ofcars, small engines, aircraft androckets. Other potential applicationsinclude: Sealing seams on various liquidstorage tanks Sealing aerospace and automotivefuel lines and tanks Providing temporary patch forrubber linings exposed to corrosiveconditions Sealing pipe joints on lines carryingcorrosive chemicals and solvents Providing formed-in-place gasketsfor sealing chemical compressors Providing formed-in-place gasketswhere irregular shapes and harshconditions reject ordinary seals Bonding or sealing componentsexposed to moisture, vibration, shock,certain fuels, oils and solvents forlong periods of timeTYPICAL PROPERTIEST hese values are not intended for use in preparing SuppliedColor.

3 WhiteCTM1 0097 Specific Gravity at 77 F (25 C) .. 0364 Extrusion Rate, 1/8-inch orifice at90 psi, g/minute .. 250 CTM 0098 Skin-Over Time, minutes .. 10 CTM 0095 Tack-Free Time, minutes .. 25 Physical Properties As Cured 7 Days at 77 F (25 C) and 50% RHCTM 0099 Durometer Hardness, Shore A, points .. 40 CTM 0137 ATensile Strength, psi .. 300 CTM 0137 AElongation, percent .. 200 CTM 1112 Tear Strength, ppi .. 27 CTM 0293 Peel Strength, Aluminum Alloy Alclad 2024T3,with Dow Corning 1200 RTV Prime Coat, ppi .. 15 Electrical Properties As Cured 7 Days at 77 F (25 C) and 50% RHArc Resistance, seconds .. 124 CTM 0114 Dielectric Strength, volts/mil .. 331 CTM 1139 Dielectric Constant, 100 kHz .. 1139 Dissipation Factor, 100 kHz .. 0313 Volume Resistivity, ohm cm .. x 1013 Repairability .. Excellent1 CTMs (Corporate Test Methods) correspond to standard ASTM tests in most instances. Copies of CTMs areavailable upon Writers: Please obtain a copy of the Dow Corning Sales Specification forthis product and use it as a basis for your specifications.

4 It may be obtained from anyDow Corning Sales Office, or from Dow Corning Customer Service in Midland, (517) Providing formed-in-place gasketsfor sealing insulators and entranceports on fluid-filled distributiontransformersLIMITATIONSDow Corning 730 Solvent ResistantSealant is not recommended: For continuous underwaterimmersion where adhesion orstructural bonding is required On concrete, brick, mortar or othermasonry surfaces On surfaces to be painted; paints donot adhere well to sealant (paintbefore applying sealant ) On materials such as impregnatedwoods or oil-based caulks that bleedoils In totally confined areas; atmosphericmoisture is required for cure On Teflon 1-coated materials,polyethylene, polypropylene ormethylmethacrylate (Plexiglas 2); sealant will not adhere well On or near sensitive metals such ascopper, brass, zinc, carbon steel,galvanized iron or magnesium; thesemetals may be corroded, especiallyin confined cure conditions, due tothe acetic acid released during thecure With solvents such as acetone orketonesDow Corning neither represents nortests this material for medical device orpharmaceutical TO USEDow Corning 730 Solvent ResistantSealant is supplied ready to use.

5 Underpressure, it flows readily from its con-tainer. The paste-like consistency makesit easy to work; a spatula or woodenpaddle can be used for tooling Corning 730 Solvent ResistantSealant cures inward from the conditions of 75 F (24 C) and 50percent relative humidity, the sealantforms a skin within 10 minutes. Tool-ing is not practical after the skin beginsforming. Alternate periods of applica-tion and tooling may be time is affected by relativehumidity, degree of confinement andcross-sectional thickness of the up to 1/8-inch thick becomerubbery solids in About 24 hours atroom temperature at 50 percentrelative humidity. Higher humidityreduces cure time AND SHELF LIFEWhen stored at or below 90 F (32 C),Dow Corning 730 Solvent ResistantSealant has a shelf life of 18 monthsfrom date of moisture in the air will cause thesealant to cure, containers should alwaysbe sealed when not in use. Once acontainer has been opened, a plug ofcured sealant may form in the nozzleor tube tip during storage.

6 This iseasily removed and does not affect theremaining trademark of du Pont de Nemours trademark of Pittsburgh Plate I: Typical Fluid Resistance Values1 These values are not intended for use in preparing ,Hardness, changeMethanol .. Corning OS 20 Fluid .. Corning 730 Solvent resistant sealant , cured 7 days before immersion, properties obtained after 7 daysimmersion at room Writers: Please obtain a copy of the Dow Corning Sales Specification forthis product and use it as a basis for your specifications. It may be obtained from anyDow Corning Sales Office, or from Dow Corning Customer Service in Midland, (517) II: Typical Thermal Stability PropertiesThese values are not intended for use in preparing Time, at Room Temperature After Exposure at 300 F (149 C)Durometer Hardness, Shore A, points ..33 383738 Tensile Strength, psi ..380 450450450 Elongation, percent ..210 240230230 Tear Strength, ppi ..30 343631 Tested at Room Temperature After Exposure at 400 F (204 C)Durometer Hardness, Shore A, points.

7 3538 38 Tensile Strength, psi .. 430465 260 Elongation, percent .. 220240 180 Tear Strength, ppi .. 3436 34 Specification Writers: Please obtain a copy of the Dow Corning Sales Specification for this product and use it as a basis for yourspecifications. It may be obtained from any Dow Corning Sales Office, or from Dow Corning Customer Service in Midland, (517) Corning 730 Solvent ResistantSealant is available in 3- and oz(90- and 141-mL) tubes, oz( ) Semco cartridges (17-L) pails, net HANDLING INFORMATIONPRODUCT SAFETY INFORMATIONREQUIRED FOR SAFE USE IS NOTINCLUDED. BEFORE HANDLING,READ PRODUCT AND MATERIALSAFETY DATA SHEETS AND CON-TAINER LABELS FOR SAFE USE,PHY SICAL AND HEALTH HAZARDINFORMATION. THE MATERIALSAFETY DATA SHEET IS AVAILABLEFROM YOUR DOW Corning REP-RESENTATIVE, OR DISTRIBUTOR,OR BY WRITING TO DOW CORNINGCUSTOMER SERVICE, OR BYCALLING (517) WARRANTY PLEASE READ CAREFULLYDow Corning believes that theinformation in this publication is anaccurate DESCRIPTION of the typicalcharacteristics and/or uses of theproduct or products, but it is yourresponsibility to thoroughly test theproduct in your specific application todetermine its performance, efficacyand safety.

8 Suggestions of uses shouldnot be taken as inducements toinfringe any particular Dow Corning provides you witha specific written warranty of fitnessfor a particular use, Dow Corning ssole warranty is that the product orproducts, as supplied, will meetDow Corning s then current salesspecifications. DOW CORNINGSPECIFICALLY DISCLAIMS ANYOTHER EXPRESS OR IMPLIEDWARRANTY, INCLUDING THEWARRANTIES OF MERCHANT-ABILITY AND OF FITNESS FORUSE. Your exclusive remedy andDow Corning s sole liability for breachof warranty is limited to refund of thepurchase price or replacement of anyproduct shown to be other than aswarranted, and Dow Corning expresslydisclaims any liability for incidental orconsequential Corning is a registered trademark ofDow Corning Corporation. 1994, 1998 Dow Corning rights in USAAGP3853 BForm No. 10-807-98 Dow Corning CorporationMidland, Michigan 48686 - 0994