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Eligible for Return, Refund or Replacement within 30 days of receipt
Eligible for Return, Refund or Replacement within 30 days of receipt
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Returns
Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. You may receive a partial or no refund on used, damaged or materially different returns.
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Sikaflex-291, Black, General All-Purpose Fast Cure Marine Adhesive and sealant. Polyurethane sealant for Boats, 10.1 fl. oz Cartridge

4.4 4.4 out of 5 stars 1,031 ratings
$23.22 $2.30 per Fl Oz
10.1 fl. oz
Black
1
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Purchase options and add-ons

Color Black
Brand SIKA
Item Weight 300 Grams
Liquid Volume 10.1 Fluid Ounces
Item Form Gel

About this item

  • Adhesive and sealant used by many boat builders, its fast cure time makes it ideal for applications where speed is important.
  • SUPPORTS: Excellent adhesion to gelcoat, fiberglass, metal and wood.
  • DURABILITY: Resistant to fresh water, sea water, limewater, sewage effluent, diluted acids and caustic solutions, temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils.
  • PERFORMANCE: It's used above and below water line. It may be squeezed or brushed into place. Excellent bond, fast tack-free time and can be painted.
  • NSF approved for drinkable water and USDA approved for incidental food contact. This product is suitable for experienced professional users only.

Frequently bought together

Sikaflex-291, Black, General All-Purpose Fast Cure Marine Adhesive and sealant. Polyurethane sealant for Boats, 10.1 fl. oz C
$20.90 ($2.07/Fl Oz)
Get it May 16 - 20
Only 5 left in stock - order soon.
Ships from and sold by Less Is Always More ✱AUTHORIZED SELLER✱.
+
3M TALC Marine Adhesive Sealant 5200 - Permanent Bonding and Sealing for Boats and Marine Applications - Black - 3 Ounces
$19.00
Get it as soon as Friday, May 17
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 11.5 x 2 x 11.5 inches; 10.58 ounces
  • Item model number ‏ : ‎ 90923
  • Date First Available ‏ : ‎ April 19, 2013
  • Manufacturer ‏ : ‎ AP Products
  • ASIN ‏ : ‎ B00C501KD4
  • Customer Reviews:
    4.4 4.4 out of 5 stars 1,031 ratings

Product Description

Sikaflex-291 is a 1-component, marine grade polyurethane elastomeric adhesive and sealant. Used by many boat builders, its fast cure time makes it ideal for applications where speed is important. Sikaflex-291 is a 1-component, marine grade polyurethane elastomeric adhesive and sealant. Used by many boat builders, its fast cure time makes it ideal for applications where speed is important. Sikaflex-291 is manufactured in accordance with ISO 9001 / 14001 quality assurance system and the responsible care program.

From the brand

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  2. Sika

    Sika is a specialty chemicals company with a leading position in the development and production of systems and products for bonding, sealing, damping, reinforcing, and protecting in the building sector and motor vehicle industry. Sika has subsidiaries in 101 countries around the world and manufactures in over 300 factories. Its more than 27,000 employees generated annual sales of CHF 9.3 billion in 2021.

  3. Sika
  4. Sika
  5. Sika
  6. Sika Pro Select

    For over 20 years, Sika has offered pro contractors and DIY'ers the same superior performing products developed and used on the most spectacular projects throughout the world. Our Sika Pro Select product range encompasses a wide array of specialty construction products from sealants and adhesives to patchers and expanding foams. From job site to store shelf, Sika ensures that you have everything you need for your everyday projects.

  7. Sika
  8. Sika
  9. Sika
  10. Sika
  11. Pour
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From the manufacturer

sikaflex 291i
sikaflex 291i
sikaflex 291i
sikaflex 291i
Sikaflex-291 Sikaflex-291 LOT Sikaflex-221 Sikaflex 1a CS ISA
Marine Sealant & Adhesive Marine Sealant & Adhesive RV/Trailer Sealant & Adhesive Polyurethane Sealant & Adhesive Construction Sealant Insulation Sealant & Adhesive
Customer Reviews
4.4 out of 5 stars
1,031
4.3 out of 5 stars
245
4.5 out of 5 stars
2,025
4.3 out of 5 stars
496
4.4 out of 5 stars
611
4.5 out of 5 stars
105
Price $23.22 $21.40 $18.50 $16.99 $8.65 $9.87
USE General purpose marine sealant & adhesive Sealant & adhesive for boats Sealant & Adhesive Sealant & Adhesive All purpose non-sag sealant Bonds to insulation boards
APPLICATION Gelcoat, fiberglass, metal & wood Deck, interior, fittings, vent Wood, metals, primers, ceramic Joints, fillets, windows & more Wall, floor, trim, window, door PVC, metal, wood, stone, glass
ADVANTAGES Fast cure, paintable, excellent bond Long open time, paintable, sandable Elastic, non-corrosive, paintable Odorless, jet fuel resistant Flexible, paintable, resistance PVC, metal, wood, stone, glass
COLORS Black, White White, Black, Mahagony White, Black, Aluminum Gray White, Limestone White, Limestone White, Dark Bronze
PACKAGING 3 fl. oz, 10.1 fl. oz 10.1 fl. Oz 10.1 fl. Oz 10.1 fl. Oz 10.1 fl. Oz 9 fl. oz.

What's in the box

  • Sealant

    • Product guides and documents

    Certificate of Analysis (PDF)
    Certificate of Compliance (PDF)
    Safety Information (PDF)

    Looking for specific info?

    Customer reviews

    4.4 out of 5 stars
    4.4 out of 5
    1,031 global ratings

    Customers say

    Customers like the sealant, saying it's a great marine grade sealer. They also appreciate the strong adhesion and that it holds up well for months. Customers are happy with the quality and ease of use. However, some customers have issues with durability and differ on appearance and adhession.

    AI-generated from the text of customer reviews

    32 customers mention25 positive7 negative

    Customers like the quality of the caulk. For example, they mention it works great, is grippy, and has great adhesion. Some say it's the best all-around marine caulking money can buy.

    "...It's a watertight seal. Very good stuff." Read more

    "...Then used it in a few other projects. It has performed amazing in all situations." Read more

    "Wonderful, grippy, but gooey to apply - super great adhesion - but absolutely need humidity such as East or West coast, near water, Great Lakes or..." Read more

    "...3 Days over and it’s not returnable, very disappointing." Read more

    13 customers mention10 positive3 negative

    Customers find the caulk easy to use and apply. They say it goes on smoothly and looks good.

    "This is a good sealant it's easy to apply and easy to use." Read more

    "Wonderful, grippy, but gooey to apply - super great adhesion - but absolutely need humidity such as East or West coast, near water, Great Lakes or..." Read more

    "...Easy to use, has held up well for months with no signs of breakdown" Read more

    "...It was just that the caulk is thick and difficult to use in that applicator." Read more

    9 customers mention9 positive0 negative

    Customers are satisfied with the strength of the caulk. They mention that it is very strong, holds up well for months with no signs of breakdown, and has a strong adhesive. They also say that the material in the dispenser is great and has held up well in a standard caulking gun for years.

    "...Easy to use, has held up well for months with no signs of breakdown" Read more

    "The material in the dispenser is great, I've used it in a standard caulking gun for years and never had an issue...." Read more

    "...to work with, and when it dries, it doesn't shrink and it's far more durable. I absolutely recommend it." Read more

    "...It's only been a month, but this seems like it will last for a very long time. Went on smoothly and looks good" Read more

    4 customers mention4 positive0 negative

    Customers are satisfied with the sealant. They mention it's easy to apply and use, and a great marine grade sealer. Some say it'll seal the rub rail on a boat.

    "...It's a watertight seal. Very good stuff." Read more

    "This is a good sealant it's easy to apply and easy to use." Read more

    "Good product, sealed rub rail on boat." Read more

    "Great marine grade sealer..." Read more

    9 customers mention5 positive4 negative

    Customers are mixed about the adhesion of the caulk. Some mention that it has excellent adhesive, is self-leveling, and sticks and seals perfect. However, others say that it was difficult to get the glue out of the product and that the bonding was weak.

    "Wonderful, grippy, but gooey to apply - super great adhesion - but absolutely need humidity such as East or West coast, near water, Great Lakes or..." Read more

    "...Not only was really hard to get the glue out of it, it broke while trying to squeeze. I was able to get some glue and at first it worked on my board...." Read more

    "Great marine caulk/adhesive. I think much easier to work with than 5200/4200...." Read more

    "Adhesion was difficult due to the product came pre hardened... it was difficult to spread and squeeze the tube...." Read more

    5 customers mention3 positive2 negative

    Customers are mixed about the appearance of the caulk. Some mention it looks good, has a shiny surface, and a smooth finish. Others say it still remains tacky to the touch and transfers easily after 7 days.

    "...Went on smoothly and looks good" Read more

    "Smooth finish. Far superior to silicone. Wear gloves though because it stays on your fingers!" Read more

    "It still remains VERY VERY tacky to the touch and transfers easily after 7 days of of 95 degree temperatures...." Read more

    "...5200 is a much stronger bond and has a very nice shiny surface." Read more

    8 customers mention0 positive8 negative

    Customers are dissatisfied with the durability of the caulk. They mention that the tube was smashed at the bottom, the content was dried out, and the tube broke while trying to squeeze. Some customers also report that the tab had broken off and the sealer had cracks.

    "Body shop wanted $1000 for new front valance because a tab had broken off...." Read more

    "I think this stuff is great, but packaging sucked. The tube was all smashed at the bottom because it was only in an envelope." Read more

    "...Not only was really hard to get the glue out of it, it broke while trying to squeeze. I was able to get some glue and at first it worked on my board...." Read more

    "Peals, Cracks, Difficult to remove and replace." Read more

    3 customers mention0 positive3 negative

    Customers are dissatisfied with the color of the caulk. They mention that it's not black and is the wrong color.

    "Pretty disappointed to find out this is not black. The sticker on the tube says black...." Read more

    "Shipped Wrong Color and Product was diffective...." Read more

    "Was wrong color and expired..." Read more

    Be sure you received the correct color before you start using it.
    4 Stars
    Be sure you received the correct color before you start using it.
    This worked great for the project I was doing on my boat. However, I ordered (and needed) black but I received white. By the time I started using it, I couldn't stop and wait for them to send me the correct color. My having to use white instead of black added a lot of time to my project since I had to make sure no white was visable under the black surface I was putting it on.
    Hide
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    Top reviews from the United States

    Tommy C.
    5.0 out of 5 stars I Wouldn't Recommend Anything Else
    Reviewed in the United States on January 17, 2024
    Size: 3 fl. ozColor: BlackNumber of Items: 1Verified Purchase
    I needed to add some seat retention as well as other Yak Attack accessories using their rivets. This is the ONLY thing I'd use to seal the 3/16 holes. Just make sure you put some in the hole BEFORE the rivet is inserted and after each layer before securing the rivet. It's a watertight seal. Very good stuff.
    One person found this helpful
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    Shorty R.
    5.0 out of 5 stars Sealant great
    Reviewed in the United States on May 1, 2024
    Size: 10.1 fl. ozColor: BlackNumber of Items: 1Verified Purchase
    This is a good sealant it's easy to apply and easy to use.
    Helpful
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    David Maceroni
    5.0 out of 5 stars Great marine grade sealer
    Reviewed in the United States on September 16, 2023
    Size: 10.1 oz (Pack of 1)Color: WhiteNumber of Items: 1Verified Purchase
    Used this product to seal a freezer ice bath. Product worked phenomenal, was a fraction of the price of comparable products. Easy to use, has held up well for months with no signs of breakdown
    6 people found this helpful
    Helpful
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    Colorado
    4.0 out of 5 stars Great product if you have humidity
    Reviewed in the United States on February 16, 2023
    Size: 10.1 oz (Pack of 1)Color: WhiteNumber of Items: 1Verified Purchase
    Wonderful, grippy, but gooey to apply - super great adhesion - but absolutely need humidity such as East or West coast, near water, Great Lakes or humid Georgia. I live in Colorado and it is still gooey on my sailboat - called the company - they said need 50-60% humidity or it won't dry. Used in my bathtub and I had to leave hot steaming water in the tube twice and it adhered perfectly. Otherwise would be 5 stars in a humid climate. 2 stars for Colorado - but it's not chemical reaction for drying - it's reactive to humidity.
    3 people found this helpful
    Helpful
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    Amazon Customer
    5.0 out of 5 stars Very Strong!
    Reviewed in the United States on October 28, 2023
    Size: 10.1 oz (Pack of 1)Color: WhiteNumber of Items: 1Verified Purchase
    Used this to seal up a solar cable gland on a bus roof. Then used it in a few other projects. It has performed amazing in all situations.
    2 people found this helpful
    Helpful
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    Jay S. Cook
    5.0 out of 5 stars Saved $1000 with this purchase
    Reviewed in the United States on February 21, 2023
    Size: 10.1 fl. ozColor: BlackNumber of Items: 1Verified Purchase
    Body shop wanted $1000 for new front valance because a tab had broken off. Upon the shop’s recommendation I purchased this and glued the piece in place. Problem solved and you can’t tell the difference.
    2 people found this helpful
    Helpful
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    Amazon Customer
    1.0 out of 5 stars Cured in the tube!
    Reviewed in the United States on May 2, 2024
    Size: 10.1 oz (Pack of 1)Color: WhiteNumber of Items: 1Verified Purchase
    I suppose it would be good if it wasn’t cured in the tube. I purchased a tube 33 days ago, I stored it between 50 and 60 degrees Fahrenheit and tried to use it on the 33rd day, it is cured in the tube, I ran a long drill down into the middle of the tube and it’s solid! 3 Days over and it’s not returnable, very disappointing.
    Helpful
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    Chris Castro
    5.0 out of 5 stars Good stuff
    Reviewed in the United States on October 29, 2023
    Size: 10.1 oz (Pack of 1)Color: WhiteNumber of Items: 1Verified Purchase
    Liked you can paint it.
    Helpful
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    Top reviews from other countries

    Translate all reviews to English
    mark wilkins
    5.0 out of 5 stars Knowing the item is coming fast!! and safe!!
    Reviewed in Australia on November 6, 2021
    Size: 10.1 fl. ozColor: BlackNumber of Items: 1Verified Purchase
    Sika Sikaflex 291 Marine Adhesive Sealant good product.
    Report
    Mario Brisson
    5.0 out of 5 stars Ideal
    Reviewed in Canada on April 15, 2024
    Size: 10.1 oz (Pack of 1)Color: WhiteNumber of Items: 1Verified Purchase
    Pour mon bateau
    Report
    jay bee
    1.0 out of 5 stars Old stock, Expired use by date.
    Reviewed in Australia on July 16, 2023
    Size: 10.1 fl. ozColor: BlackNumber of Items: 1Verified Purchase
    The sikaflex 291 arrived quickly mid July 2023, it has a shelf life of 12 months but the manufacturing date is July 22. Therefore it's at it's use by date.
    Not happy, it's not mentioned on the purchase page that your buying old stock.
    Customer image
    jay bee
    1.0 out of 5 stars Old stock, Expired use by date.
    Reviewed in Australia on July 16, 2023
    The sikaflex 291 arrived quickly mid July 2023, it has a shelf life of 12 months but the manufacturing date is July 22. Therefore it's at it's use by date.
    Not happy, it's not mentioned on the purchase page that your buying old stock.
    Images in this review
    Customer image
    Customer image
    Report
    Rob H.
    4.0 out of 5 stars Wrong Colour Sent
    Reviewed in Canada on August 26, 2023
    Size: 10.1 oz (Pack of 1)Color: WhiteNumber of Items: 1Verified Purchase
    It’s great stuff works really well but I ordered 2 white tubes and had one black, one white.
    Doesn’t seem to be anyway to complain and receive another so $30 wasted
    Report
    Robert Ferrie
    1.0 out of 5 stars Boat caulking (white)
    Reviewed in Canada on May 6, 2024
    Size: 10.1 oz (Pack of 1)Color: WhiteNumber of Items: 1Verified Purchase
    Description said white, label said white, inside was grey.
    Report