Do You Need Special Foam for Boat Seats?

Do You Need Special Foam for Boat Seats?

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Do You Need Special Foam for Boat Seats?

Foam is a material you can use to cushion objects and increase people’s comfort.

Foam inserts are made from Polyurethane, polystyrene, or vinyl, and they come in various forms, such as cushions with covers, solid pads, liquid padding, and more.

You can find the special Foam under the seat cushion for boat seats.

Some boat seat foam products are 100% waterproof, which is a major benefit for boaters on the water. Many boat seats are made from composite materials and require marine-grade Polyurethane, which prevents them from deteriorating over time due to sun exposure, weathering, or moisture, making them a perfect material for all boats.

Homeowners may consider what type of Polyurethane is the best option for their needs to get the most out of their purchase.

The boat seat foam is a popular purchase for any boat owner as it can provide added comfort during the ride.

The most common types of boat seat foam for boaters are closed-cell, semi-open, and open-cell.

You can’t puncture open and semi-open cell boat seat foam easily, meaning you should only use it for nonhazardous materials such as inflatables or fishing equipment.

Closed-cell boat seat foam will remain intact in cold temperatures, which makes them ideal for boats that are used in colder climates.

You can make closed-cell Foam with various materials, including Polyurethane and expanded polystyrene.

Closed-cell Foam is less expensive than open or semi-open seat foam, but you can puncture it easily.

Do You Need Special Foam for Boat Seats?

Boats exposed to outdoor elements, such as spray from salt water and sun exposure, should use a closed-cell boat seat foam.

Is PE Foam Better Than EVA Foam?

PE FoamEVA foam
UsageCommonly used material in manufacturing sports equipment, such as footballs and bicycle helmets.Found in inflatable products that are meant for recreational purposes. It is also used as an interior furniture padding
PerformanceCapable of withstanding heavy impactLight padding compared to its predecessor, the polypropylene foam
Chemical CompositionMore carbonate and less vinyl acetate than EVA foam.

This makes it more resistant to heat and flame.
More vinyl acetate and less carbonate in its chemical composition.
CharacteristicsStronger than EVA foam under the same weight.More flexible than its predecessor, with lower tensile strength.

Due to its flexibility and low tensile strength, it can be stretched to twice its original length upon itself.

What Kind Of Foam Is Best For Boat Cushions?

Foam typeFeatures
Medium Density Polyurethane Antimicrobial FoamThe high weight of 1.9+ cubic feet

-won’t get as hard as other polyurethane foam
– good for absorbing water, resistant to mold and mildew

-Somewhat expensive
-Best for high-use areas or those who want a firmer feel.
Closed FoamWaterproof
-Dust and dirt resistant
-Easy to clean
Latex Foam (Not Polyurethane)Gel-like consistency
– Best for high-use areas or those who want a soft, springy feel.
Cushion FoamComfortable

-Good resistance to mold and mildew
-Cheaper but not as durable
-Easy to clean by vacuuming or hosing off
Polyurethane Foam (For Upholstery)Affordable
-Harder and less comfortable than closed-cell Foam.
Dry Fast FoamWon’t absorb water
-low-cost, lightweight
-Best for those who want a soft feel.

How do you Build A Boat Seat Box?

Here are the steps on How to Build A Boat Seat Box:

You first need the materials from your home or hardware store: Plywood, 2x4s, screws, nails, paint, primer, and sandpaper.

Keep in mind that building the seat box frame should take up to one hour. It will be larger than your actual boat bench for support reasons and about 18 inches long with a width of 12 inches.

I had to drill a half-inch diameter hole in my 2x4s for the bolt and 2-inch diameter holes for the screws. It would help if you drilled the holes with a hand drill. Also, measure the length, width, and height of the boat bench’s seat.

From the bench seat frame, measure out your boat box’s cutout space that will be used as material hold locations by cutting it to size and then add a 1/2 inch strip on both sides of the extended edge.

Measure the width and length of the cutout of your seat box.

The box bottom will have a hanging lip around it, which you can use to fasten the frame to the sides of the seat box.

The width, length, and height are all up to you, but you should reinforce it by using at least three 2x4s for maximum support.

Screw or nail all sides from top to bottom except one side opposite your bench seat frame. Also, screw or nail on the material hold locations that you have previously cut out.

Now that your box frame is constructed paint it, so it’s ready for its final coating for protective and waterproof sealing.

Before tacking up the bottom of your seat box, measure a half-inch off each end because it will be in contact with a boat rail or chain link in some areas of the boat.

How Thick Should Foam Be for Boat Cushions?

3-4” interior dimension. This foam thickness will provide you with a comfortable and supportive cushion for your boat seats.

Thicker cushions are best for boats that spend more time on the water or those of you who sit for hours.

If you’re considering purchasing foam cushions, remember that some brands, such as Tuft & Needle, offer custom sizes to fit your needs and can be blended with other materials like memory foam or gel memory foam.

Do You Need Special Foam for Boat Seats?

Furthermore, many companies offer more than one cushioning material, so you can choose three different types of Foam.

Some companies have even said that they offer two products: One material for flat cushions and another design for contoured cushions.

Foam TypeInteriorExterior
Medium Density Polyurethane Antimicrobial Foam 3-4″4-5”
Closed Foam 3-4″4-5”
Latex foam (not Polyurethane) 3-4″4-5”
Cushion Foam 3-4″4-5”
Polyurethane Foam (for upholstery) 3-4″4-5”
Dry fast Foam 3-4″4-5”

How Much Does It Cost to Make Boat Cushions?

It will cost you between $4 and $6 per square yard to make cushions for a boat.

However, this figure is not set in stone, as you can get cheaper or more expensive depending on how many colors you choose and what materials you use to make them.

The price of boat cushion material varies quite a bit, so it’s hard to know your cost. However, the price of the individual cushions is less important than how much you spend on material overall.

If you use a nice, quality fabric for your boat cushions, you can expect to pay more than if you went with something cheap and basic.

Fabrics can cost anywhere from $1.50 per yard to $5 or even more per yard, depending on the material and manufacturer.

Commonly used materials include cotton, outdoor vinyl, outdoor polyester, and outdoor canvas, among others. Cotton is a popular choice for cushions; however, this can be expensive.

Composite materials save you money in the long run by allowing you to make multiple cushions at the same time that it would take you to make one cushion with cotton, for example.

These fabrics can be made with different materials, including cotton, polyester, and vinyl.

What Is the Difference Between PE Foam and PU Foam?

1. Material

PE foam is made from polyethylene and uses natural gas or coal as a fuel source.

PU foam is made from Polyurethane and uses energy from all the available sources, including natural gas, hydrocarbon fuels, biomass, and renewable energy.

2. Raw Materials

PE foam uses liquid and low-grade precursor polymers.

PU foam uses liquid and high-grade precursor polymer, which you can produce from a single chip.

3. Construction

PE foam is not very flexible, so the other components are used to make it more flexible, i.e., the sheets are wrapped around the Foam. The sheets are coated with glue to increase its flexibility and durability.

PU foam is very flexible and can be foamed by itself.

4. Lifecycle

PE foam is very long-lasting, but it is not adapted for outdoor use.

PU foam is not very long-lasting but needs to be adapted for outdoor use.

5. Applications

PE foam with a density of 0.50 G/m3 and 0/0.60 G/m3 can be used as insulation. It can insulate things that are made of glass.

PU foam is used as a filling material. It is also used to add extra strength and rigidity to products, such as wheels and the towers of wheelchairs.

The factory span of PU foam is smaller than that of PE foam; it has a specific working area that does not get bigger than one-meter square.

How Long Does EVA Foam Last on A Boat?

EVA foam can last from about three years to as many as seven. Like all Foam, the lifespan of EVA is directly related to its exposure to UV radiation.

If it’s left outdoors, this Foam expires very quickly, but if it’s stored in an airtight environment with no access to sunlight (such as underwater), then it can last for seven years or more.

EVA foam is a synthetic material to construct boat hulls and other boating equipment. While it has been known to last for many years without deformation, it’s still best to steer clear of extreme heat, water, and moisture.

To keep your EVA foam long-lasting, wearing gloves is essential to keep EVA foam from degrading. Keeping it away from direct sunlight is another factor that can help you.

EVAs are excellent insulators, and they have high tensile strength. They will protect your boat and boat parts from the elements.

EVA foam is a synthetic material known for its durability when used correctly and kept in proper conditions. You can install EVA on the hull of our boat for various purposes.

The material provides extra protection from the elements, especially from water and sunlight, which will cause damage to the vessel.

Does Foam Make a Boat More Stable?

Yes! The Foam makes a boat more stable. Increasing the amount of quality foam on board the boat will make it sit a little higher, improving stability.

The Foam is heavier than air and has an excellent buoyancy-to-weight ratio, meaning it can handle large pressures without breaking or wrinkling.

It will also act as a buffer against the waves and disperse the boat’s weight more evenly across its structure.

Foam is lighter than water, so it tends to make a boat ride higher in the water, increasing its stability. The Foam also absorbs some of the energy in wave action and wave impact, keeping things stable on board.

Foam increases space for storage or people on board a vessel that might otherwise be dangerously tight quarters.

The Foam effectively provides a buffer against the wind and seas, which keeps a boat much more level and stable than an un-foamed craft.

Marine flotation foam will provide greater stability in rough conditions – it can absorb some of the energy from the waves without breaking or wrinkling the surface of the water – this makes it so that the boat does not “Boogey.”

Foam is the result of water that’s been heated up, which then expands and exerts pressure at lower temperatures.

This creates something similar to ocean waves, which help create stability in conditions like rivers or inlets while also cutting down on drag when the water gets rough.

This process has made boats much lighter since Foam became popular as an inflatable material.

How Do I Revive My Boat Seats?

You can revive your boat seats by airing them out, or you can use a vacuum to clean the seat covers and remove dirt that has built up on the fabric.

Once you do this, spritz them with water from a spray bottle and pat dry with a lint-free cloth. Reinsert the cushions.

To air dry, remove your boat seats from your boat and lay them on a shade tree or other surface that is exposed to direct sunlight. Cover the seat with a household fan pointed at the seat.

Sometimes, you may use additional light sources (like a hair dryer). Leave this for about 24 hours. After that time, please turn off the fan and let the material air itself.

You can use a vacuum and an old toothbrush to remove hardened dirt for a quick fix.

Be sure to use the lowest setting possible, start cleaning from the farthest corner of the boat seat, and then move closer until you get to the seams. Be sure not to suck up any of the Foam inside.

Once you’re done cleaning, use a fan to dry them out. When these are dried, reinsert your boat seats back into your boat.

You can reinsert your boat seats back into your boat after they’ve been airing out.

However, you should check the seams of your cover to ensure the threads are not exposed and moist. You should use some tape or glue to repair the seam if they are.

If your seams are apparent inside, it is best to cut out a small piece of Foam from the new material and insert it in the seam.

After doing this, you can rinse your fabric using water from a spray bottle under light pressure.


Foams are elastic and tend to bounce back to their original shape. The Foam, when compressed, will expand once again.

The only way you can permanently damage the Foam is through heat or fire. With steel, you can easily bend it into a different shape.

With aluminum and plastic, they are more durable. They are much tougher against extreme heat and cold exposure than steel or wood.


Hi! I' am Tom. I was a manager in one of the biggest stores for over 10 Years, am also an SEO by night. I don't like to call myself a blogger; they are very analytical, do email marketing, and know all SEO stuff. I faced many questions from customers about different products, and there was hardly any help on the internet. After learning all the things about these products as a manager the hard way, I decided to start a blog and help other people.

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