Your browser is not supported. For the best experience, you should upgrade to a modern browser with improved speed and security.

Nu-Calgon - 4293-04 Nu-Foam™ Expanding Sealant

Item: 4293-04
MFR: 4293-04

Store Inventory

Sign in to see real-time inventory at the stores closest to you.
What’s the price?
Sign in for pricing.

Frequently Bought Together

Best Sellers

About This Product

Product Info


Nu-Calgon - 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 it 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 Pounds (lbs)
Width2.5 Inches (In)
Height8.5 Inches (In)
Country of OriginUSA
Length2.5 Inches (In)
ApplicationSealant and Insulation
Application Temperature<240°F (115.5°C)
BaseDiphenylmethanediisocyanate,isomeres andhomologues
CompositionDiphenylmethanediisocyanate,isomeres and homologues, methylenediphenyl diisocyanate, tris(2-chlorisopropyl)-phosphate, dimethyl ether, isobutane, propane
Container TypeAerosol Can
Dry Time<30 minutes
Fire RatingFlammable aerosol
Flash Point-155 °F / -104 °C (propellant)
For Use WithHVACR
FunctionsExpanding Sealant
Package Quantity12 x 9 oz. cs.
Prop 65No
RatingsNFPA rating: Health=2, Fire=4, Reactivity=1
Shelf Life2 years
Size12 oz. can
Solids ContentFoam
Storage Temperature<120°F (48.8°C)
Temperature Range>240°F (115.5°C)
TypeFoaming sealant
UL ListedYes
UL RecognizedYes
UV ResistantNo
Volume12 ounces


Equipment Part List