Boat Foam - Pouring Expanding Flotation Foam - 2lb density closed cell Polyurethane - 1 Gallon - Single Component needs only mixing with 1% to 5% water - Waterproof, Thermal Insulation, Soundproofing.
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Features
- -Advanced tehnology of single component formula with foaming ration up to 30 times.
- -Good propeties for flotation , waterproofing , sound proofing , thermal insulation.
- -Not sensitive to the added water amount (1% to 5%..) and needs 20 second manual mixing (no need for drill mixing)
- -Start foaming after 2 minutes after mixing with water which gives enough time for pouring. and it finsh complete foaming in 6 minutes , and tack free in 20 mi0nutes.
- -The small packing of 1 Gallon makes easy handling.
Description
"Comtech Boat Foam" 2 Lb. Density is a new technology formula of single compontent expanding polyurthane foam for boat flotation. -It needs only mixing with 1% to 5% water to start foaming (manual mixing without drill). -It's suitable for filling gaps in all kind of boats , kayaks and other marine applications. "Comtech Boat Foam" is expanding with a high ratio to save the consumed quantity. -When it cured it makes rigid strong closed cell foam. -Reaction time : 2 minutes to start foamin , 6 minutes to complete foaming , 20 mintutes tack free. -As it has low viscosity it can penetrate through very narrow gaps. Foaming ratio up to times.
Item Package Dimensions L x W x H: 10.43 x 6.57 x 4.29 inches
Package Weight: 4.6 Kilograms
Brand Name: Generic
Manufacturer: USA
Date First Available: August 10, 2023
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Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
This stuff works perfectly. I mix it at 2% water by volume. Can't remember the expansion ratio when I first used it but now, 6 months later the expansion ratio was about 15x the original size/volume. During that 6 months the can was stored indoors and no special effort was made to purge the atmosphere inside the can during storage. It's very easy to use. Even when using boiling water there's enough time to thoroughly mix it before expansion starts. That's really nice when compared to the two-part foams. Once it starts expanding it goes for quite a while 10-20 minutes and seems to always have an extra push of expansion toward the end of that time. It's usually done by 30 minutes and you can take care of any excess at that point but I usually wait a full hour for it to get fully hard. Don't try to clean it up when it's not fully cured as it's super sticky. Instead, wait until it's fully cured and then clean up is really easy. There is slight odor of rubbing alcohol during the time when it is expanding and curing but it's not bad unless you're in a closed environment with it.
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Reviewed in the United States on April 7, 2025 by Amazon Customer
I've used a variety of different boat foams from this site. This one is unique being one part, works in all temperatures. It sets more densely than 2 part foams, is tougher and has a stronger outer surface. I like working with it because it goes off a little slower than the others. Most importantly it simply doesn't absorb water that I can find. The others do. Very slowly but they do. This stuff seems impervious. It expands a little less. Is lighter coloured and significantly stronger. I'm using it solely now. Didnt crack over the first year. Others have cracked used on same project. I recommend trying it. Cheers.
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Reviewed in the United States on February 21, 2025 by Equator Marine
This product was very easy to use and expanded to the volume as described in the description. I mixed 3oz of boiling water to 2qts at a time. I had plenty of time to mix it, a good minute before pouring. The reaction started slow then took off and filled the cavity within minutes. I've done lots of marine work but never used expanding foam. I can't wait to find other uses for this product. I wouldn't waste my time considering 2 part products.
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Reviewed in the United States on January 17, 2025 by Zachary Nelson
Got the electric kettle out and mixing 4 ounce batches for my application just gave it a splash boiling hot water stirred for 5 to 10 seconds and poured using in such small quantities. It was difficult to get a consistent Phil. I was trying to fill a cavity of roughly 35 ounces, and did not measure the product precisely
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Reviewed in the United States on August 26, 2024 by chip
This stuff works very well if everything is warm. There are no instructions except use 1-5% (a few drops) of water. I used 3 gallons on my boat project. The first gallon I use room temperature water from a spray bottle. I mixed in 5-6 squirts. Then mixed for 90 seconds and poured. The results were disappointing. I had very little expansion (only about 5 times expansion). The result was a bulletproof thin layer of hardened sludge in the bottom of my fiberglass boat. (Which may not be all that bad- but not what I was expecting.) Honestly I was disappointed. The next gallon I used boiling hot water. I used a solid splash poured from a pitcher. I mixed vigorously until I got a color change from dark brown to tan. Then suddenly the slurry kicked! I had to pour quickly to get the rising foam out of my bucket. The results were fantastic! Very high expansion with very strong foam formation. Probably 30 times expansion. Every bit as much as a two part A & B expansion foam. At this point I was very pleased. The third gallon mixed with hot water worked as well as the second. (Caution the expanding foam does build some pressure in a confined space. I did hear my boat hull grown and pop as the foam expanded. I would recommend having your boat foam stored at room temperature until use. Pour your foam on a warm day into a warm compartment and use a solid splash of hot water and mixing vigorously for best results. Even though my first first attempt was disappointing. I’m going to give this product 5/5 stars.
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Reviewed in the United States on November 12, 2023 by Shara
This is perfect product. Best value for your money. Do not be afraid to buy it because it's Moisture activated. It works Perfect, Anyone can do it. Do not need super hot water. Just need to be 70 degrees with warm water. 10: to :1 Mixing ratio.
Reviewed in the United States on January 26, 2025 by mike k.
It's a little hard to gauge how much to mix, but I started light and adjusted accordingly. Filled the front and rear floatation compartments in my canoe. The picture is the first pour. I did two more smaller pours to finish. On the next compartment I mixed a little heavier and only had to do one final pour to finish. Had to trim some with a saw, but that is to be expected. Read the rest of the reviews about temperature concerns, especially the water. I mixed in a large cottage cheese container and I let dry thoroughly and the residual peeled right out. I'm sure a larger container like an ice cream bucket would clean up well also. I am very well pleased with the results!
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Reviewed in the United States on August 24, 2024 by Amazon Customer Amazon Customer
This product is a good alternative to a 2-part foam especially at the price value. It sets off really well, expands more than expected and sets up hard. Like others that have used and reviewed the , I would recommend using hot water instead of cold or room temp. I would recommend and will be buying more. ( Hint Hint to the seller )
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Reviewed in the United States on October 18, 2024 by Boat Show Boat Show