Energy Conscious | Weatherization, HVAC, Energy and Water Effici9ent Products - Energy Conscious

Dow Great Stuff Pro Gaps and Cracks 24 oz Gun Foam - 341557

Mouse over the image for zoom

Special Price $13.99


Regular Price: $17.35

You Save 19%
Energy Score
Energy Score

In Stock

Special Price $13.99


Regular Price: $17.35

Availability: Ships the next business day
Free shipping

    Product Description

    Note: This is hazardous material, please read safety instructions before dealing with this item.

    Dow GREAT STUFF Gaps & Cracks 341557 is a polyurethane-based insulating foam sealant that fills, air-seals and insulates small gaps (less than 1 inch) inside or out. But you probably guessed as much from the name. What you might not have guessed is how easy it is to use or how it expands to take the shape of cracks and voids to form a durable, airtight, and water-resistant bond that eliminates unwanted airflow and helps reduce condensation.

    The straw foam Great stuff loses between 10 to 15% of its Yield through the straw, whereas the Pro Gun draws every bit of foam from the can and is much quicker on the job. Time and Yield are essential ingredients for profit.


    • Forms a permanent weather-tight seal to minimize drafts and insect infestation
    • Exceptional adhesion to building materials
    • Interior or exterior use
    • Tack free in 6 minutes; Trims in 30 minutes
    • Foam elasticity allows for movement/shifting within a structure
    • Paintable, stainable and sandable
    • Cream colored foam
    • Cures rigid
    • All-direction dispensing
    • UL Classified
    • Fills, seals and insulates gaps up to 3"
    • Bonds to most building materials
    • High yield-up to 1,000 linear ft x 3/8" bead
    • Controlled expansion
    • Quick cure and trim
    • One can = 26 quart tubes of caulk

    Applications: Filling, sealing and insulating of joints, voids, and cavities. Also approved for use as an alternative fi reblocking material in indoor and outdoor-to-indoor plumbing, HVAC, gas and electrical penetrations.

    Installation: Read all instructions and safety information (MSDS) before using any product. Foam bonds to skin quickly - wear gloves, eye protection and work clothes during application. Use drop cloths.

    Surface Preparation: Surface should be free of oil, grease and excess moisture.

    Application: Great Stuff Pro is applied with a gun applicator at the junction of the plate line and the slab or foundation, any penetration through the top or the bottom of the plate line, cracks and holes in the exterior sheathing from penetration made for utility services, corner and T-wall intersections, and any other place where air might penetrate the exterior envelope.

    Storage: Store in cool dry area in upright position.

    Limitations: Great Stuff Pro professional foam should not be left permanently exposed to ultraviolet light.


    General Characteristics

    PropertyTest MethodsGaps & Cracks
    Basis-MDI monomer, polyurethane
    resin propane/isobutene
    UL Classifi ed (Class 1)ASTM E-84Flame Spread 20/Smoke
    Developed 20
    DensityASTM D-16221.06
    Thermal Resistance (R Value)ASTM C-5184
    Percent Closed Cell ContentASTM D-2856>61.63
    Application Temperature-25°F to 90°F
    Storage Temperature-Up to 120°F
    Service Temperature--200°F to +200°F
    Shelf Life-12 months
    Tack Free Time-6-7 minutes
    Cure time-1 hour
    Cutting time-30 minutes
    Yield 24 oz canBead SizeLinear Feet



    Customer Reviews 6 item(s)

    Can get messy
    Make sure you practive with this product before you start your project. This stuff can go everywhere if you don't know what you are doing, and you will NOT remove this product from unintended areas easily. Mark my words
    Overall Rating
    Review by Daniel / (Posted on 6/6/2013)
    Terrific product
    I used 8 cans of this stuff in my home restoration project. Also use the door and window foam for the 13 windows I installed. I left a a half full can of the gap & crack gun foam on the gun for 11 months and it worked just like new, if anyone tells you differently, they must have done something wrong. When you change the cans be sure to shoot some cleaner into the gun mounting port to clean it out before mounting the new can.
    Overall Rating
    Review by Paul / (Posted on 8/26/2012)
    using for years
    I have been using this system for years... it is very sweet to be able to meter out your foam.
    If, you are not a pro -- not sure why you would need this.
    Overall Rating
    Review by ProPhotographer1 / (Posted on 6/21/2012)
    Great Stuff is great
    This stuff is great. I've been using the consumer grade of this stuff for a while now, but this plus a dispensing gun I bought brought everything to a new level. Now I don't have to worry about the stuff coming out after I've stopped squeezing the trigger.
    Overall Rating
    Review by dmfranko / (Posted on 2/1/2011)
    High Quality Product
    Don't mess around with the stuff you get at the big box stores. Spend the extra money on the gun and the pro cans.
    Overall Rating
    Review by Andrew / (Posted on 1/9/2011)
    I love spray foam.
    I love spray foam.
    This, combined with the pro handle make spray foaming so much neater and more accurate. You can also easily stop mid-can, which is great.
    Overall Rating
    Review by Stuff / (Posted on 5/4/2010)
    Product Question

    Product Questions

    No questions yet. Be the first to ask the question!
    Shipping Calculator
    Find a Contractor
    Start your search for a professional contractor (HVAC, heating, air conditioning, refrigeration, home and building performance, plumbing, and more) by finding a certified member contractor near you.