Skip to Content

5 DIY Spray Foam Insulation For The Best Results

Spray foam insulation for shipping containers is the best solution to insulate your portable storage unit. There are two types of spray foam. The two types are Open cell or Foamular and Closed cell or Foamolinic. 

Both types of insulation have significant benefits to using them on your shipping containers, but the kind depends on what you want to use the container for. 

Here is the best DIY spray foam Insulation for shipping containers to ensure perfect results.

FROTH-PAK 210 Insulation Kit

The 210 Foam insulation kit contains an ISOCylinder, a Polyol cylinder (B), and the INSTA-FLO Dispensing Spray Gun. 

This self-contained system yields approximately 17.5 cubic feet of foam per kit. Each kit comes with 6 different-sized spray nozzles outfitted for both fan and cone application methods, as well as a 9′ hose assembly.

It locks air infiltration, helping to meet ACH code requirements and passing ICC-listed tests; the paint dries in less than a minute.

FROTH-PAK’s Class-A rating (flame spread of 25 or less) allows it to be used in many different settings. Check with your local codes before applying the foam insulation.

You can paint it on any exterior or interior wall, including garage rafters and basement wall cavities in shipping containers. You don’t require a vapor barrier before you apply the sealer (but we recommend that you do).

This product, which covers 210 sq. ft. with one inch of foam, is described as a “210” because that figure represents how much area the application will cover when wholly finished (the liquid expands to fill all available space).

Spray the product evenly to get maximum benefit. Do not spray directly onto a single spot for too long.

One of the features of this foam insulation is that it resists moisture.


  • This kit comes with enough foam to cover 210 square feet.
  • The craft is easy for beginners as well
  • The material is designed to prevent mold and bacterial growth due to moisture.
  • Have 10 nozzle tips.

Read More: Important tools for building a container home

Foam It 202 Fire & Flame Retardant Insulation Kit

This pack covers 202 sq. feet (18’x 20′) with a 1-inch thick layer of high-quality insulation.

The kit includes a pair of safety gloves, adjustable tips to change the spray pattern for different jobs, and money-saving coupons.

This product fills gaps and cavities in your container home, creating a barrier that keeps out cold, bugs, and water.

Because the spray has a green tint, you can tell exactly where it lands on your surface without confusion.

It prevents air leaks since it is not an open cell. The barrier also reduces the chances that mold will grow within a vehicle’s interior.

This spray foam has a total R-value of 7. This is higher than most spray foams on the market, and their R-values tend to be lower.

See also  Can You Put A Shipping Container On Agricultural Land?


  • Has flame retardants
  • The kit includes several nozzle tips so you can change the spray pattern
  • It has 202 square feet of spray foam insulation.
  • It has an R-value of 7
  • The green coloring is an easy way to differentiate the foam from its surroundings.
  • It is Mold resistant.

DOW FROTH-PAK 620 Spray Foam Sealant Kit

Suppose you are working on big projects, such as a luxury container garage, the Dow Froth-Pak 620 Spray Foam Sealant Kit can help you get it done.

The 620-sq.-ft. The size of this product gives it a large enough capacity to insulate your home adequately.

Its most impressive characteristic is that it cures within a minute.

The formula in this insulation foam expands and hardens quickly but also forms a moisture barrier, so the temperature inside each room stays constant.

This solution is a good choice for all buyers, whether fixing a small corner of their crawl space or the entire area.

This kit comes with a petroleum jelly packet, a small wrench, 12 nozzles (8 cone-style and 4 fan-style), and 15 feet of hose.

In less than 40 seconds, a thin layer of skin begins to form and acts as a primary insulation barrier.


  • It includes all of the necessary tools and equipment.
  • Quick curing process
  • The material is capable of covering over 600 square feet.
  • Maintains an even temperature in the home and inhibits mold growth.

Read More: How to perfectly waterproof your shower

Foam Kit 110 Spray Foam Insulation

This top-tier pack is specially made for small areas, such as tiny sheds and crawl spaces.

The 10-foot length of hose that comes preconnected to it makes the vacuum easy to use without feeling tied down by its presence.

The gun has two separate tubes to prevent the chemicals from mixing.

The mixture hardens as you squeeze the trigger, creating a new bond between two previously separate parts.

The spray will expand up to 30 times its original size, so ensure you don’t use too much in one application.

This spray foam comes with everything you need right out of the box.

In order to do it properly, you don’t have to hook up the hose. As mentioned earlier, both bottles are already upside down.

The foam comes out automatically when you press the nozzle, so there’s no need to mix or apply it by hand.


  • The quick and easy setup process
  • It uses a small amount of spray form to fill spaces
  • Includes a 10′ hose and additional nozzles
  • Dries within a minute of application

Read More: Are Shipping Container Homes Legal In New York?

Froth-Pak 620 Spray Foam Sealant Kit

Package of Froth-Pak 620 insulation kit
Courtesy: Menards

With its industry-leading, customizable dispensing system, FROTH-PAK 620 Foam Sealant Kit ensures consistent product flow rate and on-ratio application.

This product is often used in various applications on the interior and exterior of buildings. 

It can be found under roofs, around wall junctions; in holes or cavities inside walls; at electrical, mechanical, and plumbing penetrations, and anywhere that might otherwise let cold air leak into your home during winter months!

The new formulation operates more efficiently and with fewer harmful chemicals, reducing greenhouse gas emissions by 99% while not harming the ozone layer or contributing to global warming.

See also  How To Join Two Shipping Containers Together

The patented nozzle technology of the sprayer increases its mixing ratio, reduces overspray, and offers a 30-second tack-free/cure time. It is also compliant with all contiguous 48 states’ regulations.

FROTH-PAK 620 is a two-component, quick-cure polyurethane foam that creates a seal on gaps between 2 and 4 inches.

This kit includes the following;

  • 1 Part A Tank of Isocyanate 
  • 1 Part B Tank of Polyol
  • 15 ft hose 
  • INSTA-FLO Gun Dispenser & Hose Assembly with Cone Spray Anti-Crossover Nozzles
  • 1 Petroleum Jelly Packet (5 g)
  • 1 Operation Instruction Manual.

SPECIAL NOTE! Due to the nature of this product, additional fees apply for returns in accordance with DOT guidelines. For Professional Use Only.

Read More: Here Are The Best 15 Energy-Efficient Homes and Costs 

How to Use Spray Foam Insulation

Dry off All Surfaces You Want to Spray

Make sure all surfaces are dry before applying the spray foam insulation. Wet surfaces will not hold the spray foam properly and could lead to leaks or improper application of the product. 

The temperature in your shipping container should be between 50 and 100 degrees F so that it’s warm enough for the spray foam insulation to expand properly but not so hot that it drips out of the joint where two pieces come together.

Wear Protective Gear From Head to Toe

Wearing the right gear is essential when using spray foam insulation. This is because the spray foam can cause irritation on your skin and may cause breathing problems if you inhale it. Here are the protective gears you need to wear:

Coveralls: This will protect your body from sprays and drips of foam insulation. It also protects your clothes from damage by the spray foam insulation.

Goggles: They will protect your eyes from any particles that may fall into them while you work on a project with spray foam insulation.

Gloves protect you against chemicals and chemical burns that may result from exposure to chemicals used in spray foam insulation. In addition, they help protect your hands against irritation caused by sprays and drips of foam insulation.

Read More: 13 Amazing Energy-Smart Tips to Keep Your Home Cool in Summer

Remove Excess Foam by Using a Curry Comb

If you want an even cleaner look and more professional result, try using a curry comb instead. 

These hand tools have a broad head covered in tiny spikes that break down any excess material without leaving any gouges or scratches behind. 

They’re also great for removing excess adhesive from your hands or other surfaces after finishing a project!

Your shipping container should look very tidy after the whole process.

Cover Areas You Want to Insulate

The first step in applying spray foam insulation is to cover any areas you don’t want to be coated with the spray foam. 

This includes furniture and appliances, so move them out of the way before starting your project. Once everything has been moved, use painter’s tape or other masking tools to cover any area you don’t need foam insulation.

Possible Safety & Health Concerns Of Spray Foam Insulation

  • Eye irritation
  • Toxic fumes. Toxic chemicals.
  • Health problems like skin irritation if the chemicals contact the skin
  • Human health
  • spray foam fumes can cause respiratory problems and lung damage.

What to Consider When Buying Spray Foam Insulation

Here are some of the key things to consider for the best results

See also  Ultimate Truth About Shipping Container Homes In California


The quality of spray foam insulation impacts both its effectiveness and longevity, two factors that are important to consider when deciding on whether to buy spray foam or not. 

This means you’ll want to ensure that any company you work with offers high-quality products that will perform as expected over time without breaking down prematurely due to poor-quality materials or workmanship issues.


The price of spray foam insulation will vary depending on what type you choose and where you purchase it from. 

While many factors can affect the cost of spray foam insulation, the denser it is, the more expensive it will be. For example, if you need 1 gallon of closed-cell foam that has a density of 1 lb/ft2 (1 kg/m2), it will likely cost less than if you need 5 gallons of open-cell foam with a thickness of 0.8 lb/ft2 (0.4 kg/m2).

Reviews Of Customers

Before buying spray foam insulation, you should read reviews from previous users of the product to determine whether it will be adequate for your needs. 

If there are any negative reviews about a particular brand and model of spray foam insulation, find out why people have complained about it before making a purchase decision. 

You should also check online forums where people discuss which brands are better than others. 

These sites provide valuable information about brands worth investing in and those that may be unreliable or poorly manufactured products.

Insulation Type

There are several types of insulation on the market today, including fiberglass batt insulation, cellulose batts, and rigid foam boards. 

Each type has its advantages and disadvantages, depending on the specific application. 

For example, fiberglass batts are inexpensive but require more labor than rigid foam boards because they must be installed between joists or rafters to prevent saggy ceilings over long spans.

Warranty Policy

Some brands offer limited warranties on their products, while others don’t provide any warranty. 

The length of these warranties differs from brand to brand and product type to product type, so it’s essential to understand what kind of warranty coverage each brand offers before making a purchase decision.

When buying spray foam insulation for your home or business premises, ensure that the manufacturer offers at least 10 years warranty on their products. 

This is important so that if something goes wrong within this period, they can be replaced without cost to you as an owner of property or business premises.

Return Policy

Testing out different products can be expensive, especially if you’re not sure they will work for your needs. 

Make sure the company has a reasonable return policy so that if you don’t like what you bought or it doesn’t work as expected, you can return it and get your money back. 

This way, if you do not like what they offer, there is no risk involved in ordering from them!

Read More: 10 Surprising Benefits Of A Neat Container Green Roof


As you can see, insulating a steel shipping container with spray foam is not a particularly difficult process. 

It takes some time and effort to get it right, but once the work is done, you’ll be able to breathe life into your shipping container home in more ways than one.

%d bloggers like this: