Name: Dow Chemical Triple Expanding Foam Sealant - 12 oz Can
Brand: DOW CHEMICAL COMPANY
SKU: M42418
Availability: InStock

Dow Chemical Triple Expanding Foam Sealant - 12 oz Can

Item No M42418

Manufacturer DOW CHEMICAL COMPANY

Mfr. Item No 157906

$9.45

Unit of Measure EA

Available: 79

In Stock

📦 On Order: 36 arriving May 2, 2026

Description
Additional Details
Purchase History
General Ledger Coding

Some product details generated with AI assistance — verify specs before ordering.

Dow Great Stuff Big Gap Filler is a high-performance, triple-expanding polyurethane foam sealant designed to fill and insulate voids larger than one inch. This professional-grade sealant creates a permanent, airtight, and water-resistant bond that effectively blocks drafts, moisture, and pests while improving overall energy efficiency. The closed-cell structure is rigid when cured and can be easily trimmed, sanded, painted, or stained to match surrounding surfaces. Ideal for both interior and exterior applications, it adheres securely to wood, metal, masonry, glass, and most plastics.

"All purpose for filling & completely sealing holes cracks gaps & other voids larger than 1/2"""" Waterproof & water resistant. Permanent ridgid & nonshrinkable. Closed cell blocks radon gas pests dust & allergens. 12oz. aerosol yealds 275' of 3/8"""" bead. Sold per each."

Fills gaps larger than 1 in. Can be use to create larger weather-tight seals to stop drafts and keep critters out. Airtight paintable stainable and sand-able. For use on all sorts of materials like wood drywall metal masonry glass and most plastics. Forms a permanent weather-tight seal to minimize drafts and insect infestation. Tack free in 6 mins. Trims in 30 mins. Foam elasticity allows for movement/shifting within a structure. Cures as rigid cream colored foam. All-direction dispensing. UL classified. One 12 oz can equals up to 19 tubes of caulk. One 20 oz can equals up to 30 tubes of caulk.

Packaging/Shipping Size and Weight: Length: 2.6" | Width: 2.6" | Height: 8" | Weight: 1.25 lbs

Features

Forms a long-lasting, weather-tight seal to keep out unwanted air for greater comfort and lower energy bills
Forms a long-lasting, weather-tight seal to keep out unwanted air for greater comfort and lower energy bills
Has elasticity that allows for movement and shifting within a structure
All-direction dispensing
Rigid after it cures and can be trimmed in 60 min
Paintable, stainable and sandable

Product Details
brand:	Dow Chemical
type:	Expanding Foam Sealant
size:	12 oz
color:	Cream
Color:	Cream
Finish:	Rigid Foam (Paintable/Sandable)
Material:	Polyurethane
Size:	12
Expansion Ratio:	3:1 (Triple Expanding)
Cure Time:	Tack-free in 5-15 minutes; Trimmable in 1 hour; Full cure in 8-24 hours
Insulation Value:	R-3.7 per inch
Application Temperature:	60°F to 90°F (16°C to 32°C)
Yield:	Up to 275 linear feet at 3/8 inch bead
Applicable Materials:	Wood, Masonry, Metal, Glass and Plastics
Base Type:	Polyurethane
Coverage:	275 ft Linear at 3/8 in Bead
Drying Time:	10 - 15 min Tack Free
Flash Point:	-104
Form:	Foam
Functional Cure:	8
Media:	Water Fog, Dry Chemical, Carbon Dioxide, Foam and Alcohol Resistant Foam
Odor Scent:	Mild
Packing Type:	Can
Resists:	Water
Series:	Big Gap Filler
Specific Gravity:	1.06
Temperature Range:	240
Usage:	For Filling and completely Sealing Holes, Cracks, Gaps and Other voids

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General Ledger Coding

General Ledger Coding is a value added service provided for you at no additional cost.

General Ledger Coding makes accounting easier by providing you with a calculated total of purchases based on your General Ledger Codes.

In addition to traditional General Ledger Summary provided at time of invoice, we can also provide quotes and order acknowledgements with General Ledger Coding as well. We also give you the ability to change a GL Code for one or all items for renovation projects that may utilize a single GL Code. We can also code any of our "extended inventory" items with your General Ledger Code at the time of quote, order confirmation and invoicing as well. We can code our item numbers directly to your GL Codes should our item categories not align directly with your GL Code Categories.

Please contact us if you wish to implement our General Ledger Coding feature.