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Jamestown Distributors(800) 497-0010
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Our Oakum caulking is made with bentonite, an inorganic compound that expands over 10 times its volume when wet. It is clean from knots and yarns, is long stranded and has no lumps or ends of sacking. Twisted jute packing. Further improved with golden oils. Does not split.
Oakum is the best choice for caulking wide gaps in planking. For varied planking, keep some Caulk Wicking on hand for tight spots, and Caulking Cotton for medium-space gaps. Typically, on boat seams Oakum caulking is next covered by a marine paint. Once dry, the remaining space is filled with seam compound (one for above waterline, another for below) before applying final topcoat.
Available in boxes of 5 lbs. and 50 lbs.
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5 lbs: 13 strands, 27" in length
50 lbs: Coil of 6 or 7 strands twisted together. Approximately 50 ft. in length & 2 in. in diameter
Hello, does the 50 lb comes in long lenght or it is 2 1/2 feet as the 5lb package?
What o bought came in one long rope and you cut off what you needDonnie T.
Donnie T Donnie T
The package is 2.5 feet but the Oakum is like a skeen of wool and thus longer than the package. Be careful in storage. If you store it upright the oils will gravitate down and can make a mess. Oakum is easier to work with than cotton. Cheers!
Hello, does the 50 lb comes in long lenght or it is 2 1/2 feet as the 5lb package?
Our shipment was in 21/2 ft pcs . We used it to stop leaks of cementacious grout in cracks in a tunnel as we filled the cracks with a high pressure pump . The Oakum worked for us but could be substituted with other stemming products
Which sealing compound is recommended to complete the oakam caulking process?
sorry. We had an above water application and did not use a sealer.
Are there two kinds of Oakum? Yours seems to be made with bentonite, but I believe the old type is made with pine tar.
Mary Julia Kephart
This is the only Oakum we carry.
The product I received from Jamestown was definitely permeated with tar/oil- it didn't smell of pine, but also didn't smell of petroleum, so I don't what it was specifically. The bentonite is added to increase the expansion when in contact with water.
The former owner of our home installed a water removal system that brings the water inside the basement to a sump pump which pumps the water out side to the storm sewer system. Part of the system include a 3' - 0" concrete skirt around the outside perimeter of the structure to divert the water from the structure. The concrete skirt has separated approximately 1" from the structure. Could oakum be used to caulk this open joint?
O. B. Deavers
Yes, oakum could be used to seal the joint. You have to make sure you pack the oakum tight in the joint and it should be fine.
can you use oakum to repair water leaks on lead joint pipes?
what size and type of pipe is it?i have had good luck using oakum with urethane gel that reacts when water comes in contact with it, on sewer pipes and storm drain pipes.
Is it safe to assume you are talking about a soil iron waste pipe? If so, if the leak is through the packing at the hub, you may be able to repack it, using oakum and more lead. If it is more in the nature of a crack in the pipe, then oakum won't work - the best long-term fix will be to replace the section.
We used ours as packing in a sealed bearing enclosure. But I am told way back when it was used in drain piping to seal tile joints. Don't know about the lead pipe.
OK, just pack the oakum in first good and tight then ram the lead behind it...it should stop the leak dead inits tracks its trac
YES! Pack it in tight. But, who uses lead joints anymore these days? Much easier to use pvc drain lines.
you may want to try tearing the oakum into thin strands and soaking in some urethane grout (3M or Avanti) and use a hammer and screwdriver and wedge into joints and urethane grout will react with the water and create a nice seal.
it's a 12" water main cast iron pipe. installed maybe 50 yrs plus ago. sometimes they leak and we just use lead type fiber and caulk it.
we have old water main lines throughout the city that are lead joints. sometimes they spring a leak and we use soft lead fiber to caulk in the bell area and it stops the leak.
How thick is the oakum?
It is roughly a 1/2" thick
It's about an inch in diameter but it's very fibrous. It easily pulls apart to any diameter you need to stuff it into. Think string cheese. I hope this helps.
I am thinking of using oakum to seal the joint between a 3' high poured concrete flood wall and the irregular veneered wall on my house. Would it be appropriate for that?
Likely yes depending on the size of the gap and the irregularity of the veneer. Otaku works by swelling to several times it's original size when exposed to water so it must be of sufficient size to snugly fill the joint . I am a contractor and I commonly use oakum to seal below grade pipe penetrations through concrete walls.
I successfully used the oakum on a concrete control joint.I used a 'NP-1' caulk product first, inserted the oacum like a backer rod, and did a finish caulk joint on top of the oakum.When the oakup gets wet it swells up and seals better than backer rod foam. The oacum can be seperated to use the size you need.I did cut some off when I first got it and put it in water...and it does swell up a lot.It did take me a while to find this at Jamestown on the net. Glad I did!If it ever does leak, I know it will be swelling up in the joint and it should not get any worse than the initial drips...till the oakum swells up and stops the leak!
Donnie T Donnie T
I can't answer that question for you. I only ordered this item per request of one of my foremen. I do know we are using it to seal leaks in 72" concrete pipe. How that applies to your needs I don't know.Sorry!
Oakum is not a sealer. I only use it in household or construction applications to repel insects and mice and reduce corrosion.
You could use it for that but I would combine it with a sealant you could caulk over with after. oakum is good for taking up space and it will seal somewhat but I always put something over it for seal tight applications.
My only concern would be for movement. You said that this was a concrete joint. Joints are put in concrete for a reason and you would not want to interfere with that. I you feel movement is not an issue then go for it. There are silicon based materials you can try that would allow for movement while maintaining the seal. Good luck
I have a strip plank mohagoney cabin. the boat is over 40 years old and expansion and cotraction has taken a toll. the seams aren't that wide. can I us oakum to fix this and if so, is their a specific type or kind?
the planks are 3/4 inch wide and the seams are about 1/8 or less. what about caulking cotton or caulk wicking?
If the planks are less than 3/4" thick and seems less than 1/8" wide and area is not regularly wet, then I would not recommend oakum, Even in oakum seems which are generally larger than above specs, there is usually a putty laid to pay the seems, In an above waterline situation with small cracks products like sikaflex would be advisable. If only hairline and very, few epoxy may work well., especially if a painted surface, if varnished or oiled I recommend black sikaflex or similar product.
I believe this product would work well in that application I don't remember exactly what product or was but Jamestown people should ne able to answer that. We used the product I purchased to stop a leaking sheet wall that We were working behind, and we were 15 ft below water level and it held back that much pressure.
Does this stuff stink? I want to use it to seal cracks inside a wooden house along the floor boards. Is white" oakum less smelly? it doesn't seem to be available on this site at this time.
This oakum has a smell but not offensive, some say interesting.It is designed to stop leaks while being moist. The white stuff is probably untreated cotton and is cheaper and no smell. Caulking gun products are probably the best option
We use oakum in sewer man holes to help stop leaks be for we inject grout. Used your oakum for years, best we have found
over all good
this is 5 pounds but is the best deal ive found by pound getting harder to find
We will buy this product from Jamestown as long as it is avl
We use this product in farrier work for race horses and performance horses
Albuquerque, New Mexico
I will buy Oakum from Jamestown Distributors for years
Equine Farrier Industry likes to use Oakum to pack into the hoof or sole while the animal is recovering from an injury. The idea is considered "old school" but works very well. All farrier supply stores should offer Oakum. We sell it by the pound.
Shannon - Manager of Paul's Vet
Not useful on traditional wooden boats
I bought this product to caulk the deck seams on an Historic wooden Schooner, as we were running low on the traditional oakum we had and wanted to make sure we would have enough to finish the job. This product, although probably perfectly fine for plumbing applications is not useful in traditional wooden boat building/restoration because it comes in such short 2 1/2 foot lengths. If you're looking for traditional oakum for caulking seams on a wooden boat, spend the extra money and get the real stuff.
I received just what I expected.Customer service impecable
Will continue to explore all the possibilities you offer.Such items are not offered in our local market.
San Jose Costa Rica
Oakum to stop a water leak around a pipe coming in basement
I had a 4 inch pipe in my basement wall that carried the electrical wiring into my house. The plug that the contractor used to plug the hole failed. Being familiar with plumbing used the old cast iron I searched for Oakum as I was sure it would plug the hole. I filled the hole with oakum, packing in it tightly and then put a 1" layer of quickset expanding concrete to hold the oakum in place.
Oakum works great
We use Oakum as a sealant for our hydro turbines. Seals dissimilar materials like cast iron, steel and concrete. It sets up and becomes a permanent repair.
International Falls MN
Customer very pleased with the product.
Customer uses for waste packing in screw conveyor adapter and other industrial applications. They have used other types in the past but likes this product very much. They will be re-ordering more in the future as needed.