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Sikaflex 291 LOT Marine Sealant Adhesive

$13.98In StockSee Product Details
Sikaflex 291 Long Open Time

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Product Details

Sikaflex 291 LOT is an all purpose elastic adhesive, used to bond floors to subfloors or metallic frames, exterior or interior panels, bonding trim moldings to hull etc. LOT stands for Long Open Time, ensuring you have the time you need to get the job done right. Use this marine sealant above or below the water line.

Choose from Black, Mahogany, or White. The 10.3 oz cartridge pictured above is used in conjunction with an inexpensive caulking cartridge gun. The 3 oz size comes in a squeeze tube and does not require a cartridge gun.

Info & Guides
    Technical Specifications
  • Density: 10.3 lb/Gal
  • Tack Dry: 3-5 hours
  • Rate of Cure: 1/4 in x 1/4 in bead 14 days at 40 deg F/60 percent RH
    1/4 in x 1/4 in bead 7 days at 73 deg F/50 percent RH
    1/4 in x 1/4 in bead 2 days at 73 deg F/90 percent RH
    1/4 in x 1/4 in bead 3 days at 100 deg F/40 percent RH
  • Shore A Hardness (ASTM D2240): 40 to 45
  • Elongation at break (ASTM D4132): 700 percent
  • Tensile Strength (ASTM D412): 200 psi
  • Lap sheer strength (ASTM D1002): 120 psi
  • Peel Strength: 30 lbs/in on fiberglass, 25 lbs/in gelcoat
  • Application temperature: 40-110 degrees F
  • Service Range: -40-180 degrees F
  • Colors: White, Black and mahogany
  • Sandable, paintable, waterproof
  • Shelf Life: 15 months
  • Video thumbnail

    Reviews

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    10 reviews with 5 stars.
    4 reviews with 4 stars.
    0 reviews with 3 stars.
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    Overall Rating

    4.7

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    Filter Reviews

    1 to 10 of 14 Reviews
    1 – 10 of 14 Reviews
    NY
    5 out of 5 stars.

    I use the Sikaflex 291 Lot on most of my wood boatsIn the la

    a year ago
    In the last year, I used both the black and mahogany colors on my antique boats. Caulking seams, Mounting hardware, Attaching decks, Etc.
    Helpful?
    Denver, CO
    4 out of 5 stars.

    I will buy and use the product again

    2 years ago
    I used it for a semi-off label project to fill topside gaps created on my 1931 Chris Craft due to moving it from (relatively humid) New York to (very dry) Colorado. It took a little experimentation to find a workable process. It was not as ""sandable"" as I might have liked and time will tell how the varnish holds. Product was slightly damaged in shipping but useable. I recommend better protecting the nozzle which had poked through a corner of the shipping box.
    Helpful?
    Penn Yan NY
    5 out of 5 stars.

    I use Sikaflex 291 Lot on all my boat Restoration Projects

    2 years ago
    My last two projects I did the bottom seams with 291 Lot 1952 Penn Yan CZT Swift 1924 Single Stepped Hydroplane
    Helpful?
    Ceres Ca.
    5 out of 5 stars.

    amazing stuff

    3 years ago
    Sikaflex 291 is amazing, I used it to make a seal on a 24'' steel irrigation valve cover, I followed the drying instructions by building a large humidor maintaining 50 to 80 percent humidity at 70-80 degrees. I had the opportunity to get water early so the dry time was five days, put cover on cranked it down irrigated, checked Sikaflex 291 seal...PERFECT. I was expecting the lower ring to cut into the new seal but to my surprise it didn't even dent it. The seal is 5/8x1/2'' thick, the best thing I saved over 100 bucks.
    Helpful?
    Ontario, Canada
    5 out of 5 stars.

    I would buy this product again, and always

    3 years ago
    I'm in the marine industry and this product is standard in use, in Canada we can't get Mahogany coloured Sikaflex, so Jamestown is my go to place for it.
    Helpful?
    Easton MD
    5 out of 5 stars.

    Deck sealer

    5 years ago
    Used it to seal my deck. So far so good
    Helpful?
    New York NY
    5 out of 5 stars.

    Good product

    6 years ago
    We used this product to adhere urethane-based foam to wood and carbon steel substrates. Bond is performing well. No issues.
    Helpful?
    Clifton Park, NY
    5 out of 5 stars.

    Sikaflex 291 LOT

    7 years ago
    Used for bedding the recessed lap joints in Adirondack guideboat planking. The long open time (LOT) is a plus. Just be sure to remove the squeeze out while it is still flowable. Also get it off your hands immediately with a solvent (acetone works) or you will have to wear it off after it cures. Using latex gloves is a better (and safer) idea. Once cured, it is like soft rubber and seals as designed.
    Helpful?
    Michigan
    4 out of 5 stars.

    Not exactly what i wanted but it worked.

    9 years ago
    WE used the Sikaflex 291 LOT for caulking the deck seams on our antique runabout. The Sika brand is the preferred and the best product for the job. However the LOT isn't really what we wanted. The normal or quick cure would have been greatly preferred.
    Helpful?
    COBBS CREEK, VA
    4 out of 5 stars.

    Truly ""Long Open Time""

    11 years ago
    This is equal to 4200 but with a slower cure rate. This allows for a partially used tube to be stored for up to 30 days. Other types curing solid in an opened tube in as little as one day. This does mean the use of the product might take up to a week or more to fully cure but for my project this was not a problem.
    Helpful?
    1 – 10 of 14 Reviews

    Questions

    1 - 10 of 15 Questions

    Q: can you use 291lot on century board&batten bottoms

    3 years ago
    1 Answer

    A: Yes, you can use 291LOT for this application.

    3 years ago
    Helpful?

    Q: Should Sicaflex be applied between wood planking and mating wood frames? For a wooden boat.

    4 years ago
    2 Answers

    A: I would suggest not.  Sikaflex will not give you the strength you will want.  I used Sikaflex for filling deck seams, where it is not providing structural strength.I used 3M 5200 exclusively for (permenantly) attaching wood to other wood (frame members and bottom plywood and planks).

    4 years ago
    Helpful?

    Q: Will this product match the Chris Craft Red Mahogany stain that you sell. It is my understanding that this product is not stainable.

    5 years ago
    3 Answers

    A: I have used other Sikaflex products. plain and mahogany. The latter has colored pigment mixed in. It is also paintable. I applied it to hard vertical pine wood siding to splits from 75 years of age/ shrinking. THe color helped, and I just painted over it with my Red Barn oil paint. Looks good. Did exactly what I wanted it to do.

    5 years ago
    Helpful?

    Q: is it paintable?

    8 years ago
    1 Answer

    A: Yes, Sandable, paintable, waterproof

    8 years ago
    Helpful?

    Q: Is this the one with the Wheel mark or IMO approval?

    8 years ago
    2 Answers

    A: No idea on that. Sorry

    8 years ago
    Helpful?

    Q: Can I use this to seal cracks in concrete sidewalk?

    8 years ago
    4 Answers

    A: I have only used it in deck seams but it would probably work in a sidewalk. I don't believe there would be any problems with adhesion and it should with stand the weather fine. It flows good from the tube so application should be fairly easy. I do believe Sika makes sealent strictly for cement joints.

    8 years ago
    Helpful?

    Q: I REPAIR INGROUND PLASTIC/FIBERGLAS POOL STEPS AND HAVE BEEN USING 3M 5200 SEALANT/ADHESIVE FOR A LONG TIME, WONDER HOW THIS SIKAFLEX COMPARESTO THE 3M PRODUCTS?

    9 years ago
    5 Answers

    A: It would be very similar. I use the 291 lot because you can continue to use the produce for a couple of weeks after opening. 5200 must be used immediately.

    9 years ago
    Helpful?

    Q: what can i use for cement patching ?

    9 years ago
    2 Answers

    A: 3M 5200. It has 2 times the holding power of the Sika-Flex 291. We use it for patching just about anything.

    9 years ago
    Helpful?

    Q: clean up ?

    9 years ago
    6 Answers

    A: Mineral spirits works well if uncured.

    9 years ago
    Helpful?

    Q: can it be used under water?

    10 years ago
    7 Answers

    A: Yes, successfully used to caulk seams between planking blow water line. Use good masking tape to cover the edge of planks... Caulked seams were cleaned and CPES was applied to all stripped planking, including seams.

    10 years ago
    Helpful?
    1 - 10 of 15 Questions
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