Spray Foam Kits

Every kit in this collection ships ready to spray. Along with the foam cans you get a professional applicator gun, a can of gun cleaner, spare nozzles, and a safety set with a protective suit, goggles, and gloves.

What you will still want from your own toolbox: painter's tape and plastic sheeting to mask anything you don't want foam on, a utility knife or serrated blade for trimming cured foam, and a ladder for overhead work. That's it. There is nothing else to buy before your first can.

Start with the square footage, then decide how thick you want the foam. A 30oz can covers about 23 sq ft at 1 inch thick, and a 26.46oz can covers about 20 sq ft. At 2 inches, the depth we recommend for real insulation value, each can covers half that area.

1. Multiply the length by the height of every surface you plan to spray and add them together.
2. Multiply that total by your target thickness in inches.
3. Divide by the coverage of one can (23 or 20).
4. Add 10% for uneven surfaces and overspray, then round up to the next pack size.

Example: an 80 sq ft basement wall at 2 inches with 30oz cans works out to 80 × 2 ÷ 23 ≈ 7 cans, or about 8 with the buffer, so a 12-pack gives you room to spare. The coverage calculator on each product page does this math for you.

It depends on how thick you spray. With 30oz cans at 1 inch, 1,000 sq ft takes about 44 cans, or 48 with a 10% buffer, which is two 24-packs. At 2 inches, the thickness we recommend for insulation, you need roughly twice that, about 96 cans with the buffer, and a 108-unit bulk pallet is usually the better value.

With 26.46oz cans (about 20 sq ft each at 1 inch), plan on about 55 cans at 1 inch or 110 at 2 inches. Enter your exact measurements in the coverage calculator on the product page to get a precise count.

Yes. The IxirPro and MagicChems kits use closed-cell polyurethane foam rated at R-5.66 per inch. For comparison, standard fiberglass batts sit at roughly R-3 to R-3.5 per inch, so a 2-inch layer of foam gives about R-11 in a fraction of the depth.

Closed-cell foam also cures rigid and dense. It stops air movement, resists moisture, and acts as a vapor barrier, which is why it is the usual choice for rim joists, basement walls, and crawl spaces where fiberglass tends to sag or hold damp.

Buy a kit if you don't already own a foam gun. The gun, cleaner, and safety gear are matched to the cans, and buying them separately usually costs more than the difference between a kit and the same number of cans.

If you already have a working gun from an earlier project, our spray foam cans are the cheaper way to restock. For very large jobs or crews, the bulk pallets in this collection bring the price per can down further and include foam guns, cleaner and safety gear.

Most first-timers get comfortable within a few minutes. The gun lets you dial the flow down to a thin bead, which is far more forgiving than straw-style cans. A few habits make the biggest difference:

• Shake the can for 30 to 60 seconds and do a short test spray on cardboard before you start on the wall.
• Fill gaps only about halfway. The foam keeps expanding as it cures, and overfilling is the most common beginner mistake.
• Work on clean, dry surfaces between 40°F and 95°F, with the can itself at room temperature.
• Build thicker areas in several even passes instead of one heavy layer.

The foam is tack-free in 5 to 10 minutes and fully cured in about 24 hours, after which you can trim it flush with a knife.

Kits are a good fit for rim joists and sill plates, basement and crawl space walls, attic air leaks around plumbing and wiring, garages, sheds, workshops, and van or RV builds. The foam expands into irregular cavities that batts and boards can't fill.

Keep foam away from chimneys, flue pipes, recessed light housings, and other heat sources, and never spray into electrical boxes. In living spaces, building codes generally require spray foam to be covered with a thermal barrier such as 1/2-inch drywall, so check your local code before leaving foam exposed indoors.

Unopened cans last about 12 months from the production date printed on the can when stored upright at 50°F to 77°F. Keep them out of hot cars, attics, and garages that get above 120°F.

To save a partly used can, leave it screwed onto the gun, close the flow knob, and store the assembly upright. Sealed this way it stays usable for several weeks. Don't remove the gun from a partial can: the valve clogs and it can't be reattached. When you switch to a new can, run cleaner through the gun first.