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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. Long open time. 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
  • Reviews for Sikaflex 291 LOT

    9 of 9 Reviews

    July 7, 2021

    I would buy this product again, and always
    By The Boat Builder from Ontario, Canada

    Verified Purchase

    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.

    Bottom Line Yes, I would recommend to a friend

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    May 29, 2019

    Deck sealer
    By Dave from Easton MD

    Verified Purchase

    Used it to seal my deck. So far so good

    Bottom Line Yes, I would recommend to a friend

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    November 9, 2018

    Good product
    By PP from New York NY

    Verified Purchase

    We used this product to adhere urethane-based foam to wood and carbon steel substrates. Bond is performing well. No issues.


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    March 30, 2018

    Sikaflex 291 LOT
    By John from Clifton Park, NY

    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.

    Bottom Line Yes, I would recommend to a friend

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    September 13, 2015

    good stuff
    By boatman BAILEY from concord nh

    Verified Purchase

    durability,functional

    Bottom Line Yes, I would recommend to a friend

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    August 13, 2015

    Not exactly what i wanted but it worked.
    By mike from Michigan

    Verified Purchase

    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.


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    April 23, 2014

    Truly "Long Open Time"
    By Jim E. from COBBS CREEK, VA

    Verified Purchase

    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.

    Bottom Line Yes, I would recommend to a friend

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    July 20, 2010

    Long open time is right
    By Kurt from Maine, USA

    I have used the same tube for about 30+ days and still flows like the 1st day. Re bedding above water line items on a sail boat that I am working on. Tape around fittings for easy clean up.

    Bottom Line Yes, I would recommend to a friend

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    September 18, 2009

    Sikaflex 291 LOT
    By JW from Homewood, Kansas

    We use this product for bedding teak toe rails and hardware on sailboats. It will last in the tube better than 5200. Easy clean up with mineral spirits.

    Bottom Line Yes, I would recommend to a friend

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