Product Information

SiliconeSealant

FEATURES• Will not slump, sag or run off

surfaces• Non-flowable; can be applied

without slumping or running off

• Good resistance to weathering,moisture and temperatureextremes

• Broad temperature rangeperformance; cured material staysflexible for continuous use from-76 to 350°F (-60 to 177°C) and upto 400°F (204°C) for intermittentuse. In cases where slightly highertemperature performance isrequired, Dow Corning 732 Multi-Purpose Sealant – Black remainsflexible for continuous use up to400°F (204°C) and intermittentuse up to 450°F (232°C).

• Adheres to a variety of surfaces

• 100 percent silicone rubber

• Meets the requirements of manyindustry standards, OEMapplications and specifications

COMPOSITION• One-part silicone rubber

supplied as nonslumping paste

Dow Corning® 732Multi-Purpose Sealant

General-purpose sealing and bonding as a space-filling rubberadhesive or a formed-in-place gasket

USESDow Corning ® 732 Multi-Purpose Sealant is designed for a number of diversesealing and bonding applications. This sealant can be used for:

• Adhering auto, aircraft and appliance trim, including metal, fabric andfabric-backed plastics

• Bonding gaskets in heating and refrigeration units• Attaching screwless brackets, nameplates, signs and sign letters• Sealing windows in oven doors and flues on gas appliances, flanged pipe

joints and access doors• Providing formed-in-place gaskets for gear boxes, compressors and pumps• Sealing trailers and truck cabs• Bonding and sealing appliance parts• Sealing marine cabins and windows• Filleting and caulking joints in sheet metal stacks, duct work and

equipment housings• Protecting components from moisture from frequent wash downs or

weathering• Sealing aircraft galleys and interiors

DESCRIPTIONDow Corning 732 Multi-Purpose Seal-ant is a paste-like, one-componentsilicone RTV designed for a widevariety of industrial sealing andadhesive applications. It cures atroom temperature by reaction withmoisture in the air to produce adurable, flexible silicone rubber.

USE LIMITATIONSDow Corning 732 Multi-PurposeSealant is not recommended:

• For continuous underwaterimmersion where adhesion orstructural bonding is required

• On concrete, brick, mortar orother masonry surfaces

• For bonding uncured sealantdirectly to hot surfaces

• On surfaces to be painted; paintsdo not adhere well to sealant(paint before applying sealant)

• On materials such as impreg-nated woods or oil-based caulksthat bleed oils

• In totally confined areas; atmos-pheric moisture is required forcure

• On Teflon®1-coated materials,polyethylene, polypropylene ormethylmethacrylate (Plexiglas®2);sealant will not adhere well

• On or near sensitive metals suchas copper, brass, zinc, carbonsteel, galvanized iron ormagnesium; these metals may becorroded, especially in confinedcure conditions, due to the aceticacid released during the cure

This product is neither tested norrepresented as suitable for medicalor pharmaceutical uses.

1Registered trademark of E.I. du Pont de Nemours Co.2Registered trademark of Pittsburgh Plate Glass.

LISTINGS/SPECIFICATIONS• Complies with FDA Regulation

21 CFR 177.2600 for incidentalcontact with food

• National Sanitation Foundation,List 51, for direct food contact,and List 61, for use with potablewater

• Recognized under UL QMFZ2

• Meets the requirements ofMilitary Specification MIL-A-46106

• Meets a variety of commercial andOEM specifications

HOW TO USESurface PreparationClean surfaces using Dow Corning®

brand OS (ozone-safe) Fluids or

other suitable solvent. Make surethe surface is free of any oil, soap orwater. Slight abrasion of the surfacemay improve adhesion. Priming maybe required on some surfaces forbetter adhesion.

Primer RecommendationsFor metals and many other substrates,Dow Corning® 1200 Prime Coat or low-VOC Dow Corning® P5200 AdhesionPromoter is recommended. Forpaints, plastics and organic rubbermaterials, use Dow Corning® 1205Prime Coat.

Follow surface preparation guide-lines above and apply a thin film ofprime coat. Allow to dry about 1 hour.Follow complete instructionsprovided with the primer.

MaskingMask adjacent surfaces to ensureneat sealant lines. If masking tape isused to mask an area, it must beremoved before a skin forms.

ApplicationDow Corning 732 Multi-PurposeSealant is supplied in ready-to-useform. It extrudes readily from itscontainer under pressure. Applysealant in a continuous operation byholding the applicator at a 45° angleand pushing the adhesive ahead ofthe nozzle.

ToolingTool, as needed, immediately afterapplication and before a skin forms.Tooling should be completed within5 to 10 minutes of application.Alternate periods of application andtooling may be required. A spatulaor paddle can be used to tool thesurface.

TYPICAL PROPERTIESThese values are not intended for use in preparing specifications.

Method Test Unit ResultAs SuppliedCTM1 0062 Flow, sag or slump inches Nil

Colors Aluminum, black,clear, white

CTM 0097 Specific Gravity at 77°F (25°C) 1.04CTM 0364 Extrusion Rate (1/8-inch orifice,

90 psi air pressure) g/min 350

Cure Characteristics – Exposed to Air at 77°F (25°C) and 50% RHCTM 0098 Skin-Over Time min 5-10CTM 0095 Tack-Free Time min 20

Cure Time, 1/8-inch bead hours 24

Physical Properties – As Cured 7 Days at 77°F (25°C) and 50% RHCTM 0099 Durometer Hardness, Shore A points 25CTM 0137A Tensile Strength psi 325CTM 0137A Elongation percent 600CTM 0069 Thermal Conductivity,

BTU per ft-°F-hr 0.11cal/cm-°C-sec 0.44 x 10-3

Electrical Properties – As Cured 3 Days at 77°F (25°C) and 50% RHCTM 0313 Volume Resistivity ohm-cm 1.5 x1015

CTM 0114 Dielectric Strength volts/mil 550Dielectric Constant

CTM 0112 at 100 Hz 2.8CTM 1139 at 100 kHz 2.8

Dissipation FactorCTM 0112 at 100 Hz 0.0015CTM 1139 at 100 kHz 0.00151CTMs (Corporate Test Methods) correspond to standard ASTM tests in most instances. Copies of CTMs areavailable upon request.

Specification Writers: Please obtain a copy of the Dow Corning Sales Specification for thisproduct and use it as a basis for your specifications. It may be obtained from any Dow CorningSales Office, or from Dow Corning Customer Service in Midland, MI. Call (517) 496-6000.

CureDow Corning 732 Multi-PurposeSealant cures at room temperatureon exposure to water vapor in theair, giving off a small amount ofacetic acid. Cure time is affected byrelative humidity, degree of confine-ment and cross-sectional thicknessof the sealant. Cure progressesinward from the surface. At condi-tions of 77°F (25°C) and 50 percentrelative humidity, a tack-free skinforms within 20 minutes. Sectionsup to 1/8-inch thick become rubberysolids in about 24 hours at roomtemperature at 50 percent relativehumidity. Higher relative humiditywill make the sealant cure slightlyfaster.

CleanupRemove excessive adhesive with adry paper towel. Remove masking assoon as tooling is completed.

USE LIMITATIONSThis product is neither tested norrepresented as suitable for medicalor pharmaceutical uses.

SHIPPING LIMITATIONSNone.

STORAGE AND SHELF LIFEWhen stored in original, unopenedcontainers at or below 77°F (32°C),Dow Corning 732 Multi-PurposeSealant has shelf life of 30 months

from date of manufacture. Refer toproduct packaging for “Use By”date. Containers should be keptsealed when not in use.

After a container has been opened,a plug of cured material may form inthe nozzle or tube tip duringstorage. When ready to reuse,unscrew the nozzle and remove thecured plug. The remaining sealantis ready to use.

PACKAGINGDow Corning 732 Multi-PurposeSealant is available in 3- and 4.7-fl oz(90- and 139-mL) tubes, 10.1-fl oz(300-mL) cartridges and 4.5- and52-gal (17- and 197-L) containers.Clear and white colors are alsoavailable in a 10.3-fl oz (305-mL)squeeze tube kit.

SAFE HANDLINGINFORMATIONPRODUCT SAFETY INFORMATIONREQUIRED FOR SAFE USE IS NOTINCLUDED. BEFORE HANDLING,READ PRODUCT AND MATERIALSAFETY DATA SHEETS AND CON-TAINER LABELS FOR SAFE USE,PHYSICAL AND HEALTH HAZARDINFORMATION. THE MATERIALSAFETY DATA SHEET IS AVAILABLEFROM YOUR DOW CORNING REP-RESENTATIVE, OR DISTRIBUTOR,OR BY WRITING TO DOW CORNINGCUSTOMER SERVICES, OR BY

WARRANTY INFORMATION– PLEASE READ CAREFULLYThe information contained hereinis offered in good faith and isbelieved to be accurate. However,because conditions and methods ofuse of our products are beyond ourcontrol, this information should notbe used in substitution for customer’stests to ensure that Dow Corning’sproducts are safe, effective, and fullysatisfactory for the intended end use.

Dow Corning’s sole warranty isthat the product will meet theDow Corning sales specifications ineffect at the time of shipment. Yourexclusive remedy for breach of suchwarranty is limited to refund of pur-chase price or replacement of anyproduct shown to be other than aswarranted. Dow Corning specificallydisclaims any other express orimplied warranty of fitness for aparticular purpose or merchantabil-ity. Unless Dow Corning providesyou with a specific, duly signedendorsement of fitness for use,Dow Corning disclaims liability forany incidental or consequentialdamages. Suggestions of use shallnot be taken as inducements toinfringe any patent.

Dow Corning is a registered trademark of Dow Corning Corporation.©1991, 1998, 1999 Dow Corning Corporation. All rights reserved.Latinquímica s.r.l.

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