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Nu-Foam™ Expanding Sealant

Item: NC-4293-75
MFR: 4293-75

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Product Info


Nu-Foam is an expanding, polyurethane, prepolymer foam that is used as a sealant and an insulating product. It is designed to seal, fill and insulate small cracks, gaps and voids. Tack free time for Nu-Foam is less than 30 minutes at 70°F and 40-50% relative humidity. Its R-Value is 4.9 per inch thick making a very good insulator in most any application and can even provide sound-deadening. Nu-Foam is UL classified and is fire retardant. Can withstand temperatures up to 240ºF.It can be used to seal and insulate areas such as openings created for refrigeration, air conditioning and heating tubes or pipes, duct joints, utility penetrations in exterior sheeting, masonry, concrete or wood walls, and other areas where unwanted air penetration might occur.


Weight1.75 Pound (lb.)
Width0 Inches (in)
Height0 Inches (in)
Country of OriginUSA
UPC or Barcode681001429320
Hazardous MaterialNo
EPA Cert RequiredNo
Length0 Inches (in)
ApplicationSealant and Insulation
Application TemperatureBelow 240ºF
ApprovalsUL classified
Compositiondiphenylmethanediisocyanate,isomeres and homologues, methylenediphenyl diisocyanate, tris(2-chlorisopropyl)-phosphate, dimethyl ether, propane, isobutane
Container TypeAerosol Can
Coverage780 linear feet
Dry TimeLess than 30 minutes
Fire RatingR12
Flash Point-155 °F / -104 °C (propellant)
For Use WithHVAC Pipes
FunctionsExpanding sealant
Package Quantity12 X 20 oz. cs.
RatingsH220, H280, H315, H317, H319, H332, H334, H335, H373, H412, R12, R20, R36/37/38, R42/43, R52/53
Service Temperature>240°F (115.5°C)
Shelf Life2 years
Size20 Ounce
StandardsUL classified
Temperature Range>240°F (115.5°C)
TypeInsulation Product
UL ListedYes
UL RecognizedYes
UV ResistantNo
Volume20 Ounces


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