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Sika Sikaflex-221, White, multi-purpose sealant/adhesive, polyurethane fast curing sealant, 10.1 fl. oz Cartridge

4.6 4.6 out of 5 stars 1,974 ratings

To see product details, add this item to your cart. You can always remove it later.
Available at a lower price from other sellers that may not offer free Prime shipping.
White
Compact

Purchase options and add-ons

Material Polyurethane
Brand SIKA
Style Compact
Item Weight 0.8 Pounds
Item Dimensions LxWxH 11.5 x 2 x 11.5 inches

About this item

  • Sika flex is the most well known brand of one component polyurethane sealant/adhesive in the world
  • This fast curing product provides permanent elastic adhesion to a number of surfaces with excellent cut and tear resistance
  • Designed to resist the shock and abuse encountered over countless road miles, Silaflex-221 will maintain its strength and adhesion over the long haul
  • Sikaflex-221 is weather resistant, sand able, paintable and NSF approved for potable water and incidental food contact
  • Fit Type: Universal Fit
  • SikaFlex-221 is the most well known brand of one component polyurethane sealant/adhesive in the world
  • Our workhorse

Frequently bought together

$19.26 ($1.91/Fl Oz)
Get it as soon as Wednesday, Apr 3
In Stock
Ships from and sold by Amazon.com.
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$12.60 ($0.42/Foot)
Get it as soon as Wednesday, Apr 3
In Stock
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From the brand


From the manufacturer

sikaflex 221
sikaflex 221
sikaflex 221
sikaflex 221
Sikaflex-221 Sikaflex-291 Sikaflex-291 LOT 1A CS ISA
RV/Trailer Sealant & Adhesive Marine Sealant & Adhesive Marine Sealant & Adhesive Polyurethane Sealant & Adhesive Construction Sealant Insulation Sealant & Adhesive
Customer Reviews
4.6 out of 5 stars
1,974
4.4 out of 5 stars
1,009
4.3 out of 5 stars
242
4.4 out of 5 stars
483
4.4 out of 5 stars
588
4.5 out of 5 stars
101
USE Sealant & Adhesive Fast cure sealant & adhesive for boats Sealant & adhesive for boats Sealant & Adhesive All purpose non-sag sealant Bonds to insulation boards
APPLICATION Wood, metals, primers, ceramic Gelcoat, fiberglass, metal & wood Deck, interior, fittings, vent Joints, fillets, windows & more Wall, floor, trim, window, door PVC, metal, wood, stone, glass
ADVANTAGES Elastic, non-corrosive, paintable Fast cure, paintable, excellent bond Long open time, paintable, sandable Odorless, jet fuel resistant Flexible, paintable, resistance UV stable, non corrosive, durable
COLORS White, Black, Aluminum Gray Black, White Black, White, Mahogany White, Limestone White, Limestone White, Dark Bronze
PACKAGING 10.1 fl. Oz 3 fl oz, 10.1 fl oz 10.1 fl. Oz 10.1 fl. Oz 10.1 fl. Oz 9 fl.oz.

Product Description

Sikaflex-221 is a high-quality multi-purpose non-sag 1-c polyurethane sealant/adhesive that cures on exposure to atmospheric humidity to form a durable elastomer. Sikaflex-221 bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength. Suitable substrate materials are wood, metals, metal primers and paint coatings (2-c systems), ceramic materials and plastics.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Sika

Sika Sikaflex-221, White, multi-purpose sealant/adhesive, polyurethane fast curing sealant, 10.1 fl. oz Cartridge


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What's in the box

  • AP Products 017-90891 Sikaflex-221, White
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    Sika Sikaflex-221, White, multi-purpose sealant/adhesive, polyurethane fast curing sealant, 10.1 fl. oz Cartridge
    Sika Sikaflex-221, White, multi-purpose sealant/adhesive, polyurethane fast curing sealant, 10.1 fl. oz Cartridge
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    Details
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    Added to Cart
    Price$19.26$8.97-31% $10.28
    List:$14.95
    $14.99$29.99$8.65
    Delivery
    Get it as soon as Wednesday, Apr 3
    Get it as soon as Thursday, Apr 4
    Get it as soon as Wednesday, Apr 3
    Get it as soon as Wednesday, Apr 3
    Get it as soon as Wednesday, Apr 3
    Get it as soon as Wednesday, Apr 3
    Customer Ratings
    Adhesion
    4.4
    4.6
    4.5
    4.8
    4.5
    4.7
    Easy to use
    4.2
    4.5
    4.2
    4.8
    4.7
    4.1
    Value for money
    3.7
    4.2
    4.1
    4.8
    4.5
    4.0
    Sold By
    Amazon.com
    Amazon.com
    Amazon.com
    Berkland Goods
    Berkland Goods
    Amazon.com
    material
    Polyurethane
    Polyurethane
    Polyurethane
    Urethane
    Polyurethane
    Polyurethane
    form
    Oz
    Liquid
    Fl
    Strip
    Paste
    Fl
    surface suggestion
    Window
    Roof
    Doors
    compatible material
    Wood
    Wood
    Metal
    Metal
    Metal
    Plastic
    stain resistant
    water resistance
    waterproof
    waterproof
    waterproof
    waterproof
    weight
    0.8 pounds
    9 ounces
    10.1 ounces
    1 pounds
    style
    Compact
    Compact
    Crack Flex Sealant
    Compact
    Compact
    Compact

    Looking for specific info?

    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    1,974 global ratings

    Customers say

    Customers like the quality, flexibility, and adhesion of the caulk. For example, they mention it's a solid sheet, it sticks well, and it has good elasticity. Some appreciate the ease of use and sealant. That said, some complain about the color and ease of removal. Opinions are mixed on value.

    AI-generated from the text of customer reviews

    104 customers mention83 positive21 negative

    Customers like the quality of the caulk. They say it's good, holds up well, and is engineered to meet the need. Some mention that the tubes are mislabeled. Overall, customers are satisfied with the product's quality and performance.

    "...Been using this product for 10 years now and have never had a leak on any repair that I have done..." Read more

    "...full width, solid sheet. it was soft enough to spread out with a normal culk gun. the bead came out well, stayed proud, and did not sag or drip...." Read more

    "Works as advertised." Read more

    "I tried to use to fix some leak on my patio roof but it didn't fix the leak. Very hard to apply...." Read more

    35 customers mention29 positive6 negative

    Customers like the adhesion of the caulk. They mention that it sticks like crazy, is an amazing adhesive, and sticks stuff together. Some say that the product is easy to apply and has a tight bond.

    "...no leaks, wind force from driving has no effect. it seems to have bonded very well." Read more

    "It has a nice consistency, but it is almost impossible to get it out of the tube.I wished it was a bit thinner...." Read more

    "...It sticks so well that once I tried to pull a bracket off and pulled the top layer of gel coat off the fiberglass! It is always my go to adhesive" Read more

    "Sticks really well and hardens harder then normal caulk but slightly softer then actual automotive seam sealer...." Read more

    25 customers mention18 positive7 negative

    Customers find the caulk easy to work with. They mention it adheres well, sets quickly, and is resistant to UV rays. Customers also say that one tube goes a long way.

    "This stuff is incredible , goes on easily, seals window frames on RVs perfectly. Water tight ...." Read more

    "...You have to put effort into cutting it with a blade.Easy to use, this stuff can stain so wear proper protection including gloves...." Read more

    "...It is important to follow the instructions and wear gloves to keep it off your skin, it is difficult to remove." Read more

    "...This stuff works. Can be applied down to 40F, and sets up in 24Hrs, fully cures 7 days" Read more

    20 customers mention20 positive0 negative

    Customers are satisfied with the sealant. They mention that it works well, is strong, and is an excellent choice for RV/Camper sealing. Some say that it's a good product for sealing gaps and window frames in RVs. Overall, most are happy with their purchase and recommend it to others.

    "This stuff is incredible , goes on easily, seals window frames on RVs perfectly. Water tight ...." Read more

    "...I use it as a cheap seam sealer anyways in certain locations, seals awesome. Recommended" Read more

    "...It levels and fills voids and stops leaks. Ask me how I know? Cause I had a leak and I fixed it with this goop!..." Read more

    "...It went down nicely and seems likely to seal well for many years...." Read more

    8 customers mention8 positive0 negative

    Customers like the flexibility of the caulk. They mention that it sticks very well and remains flexible. Some say that it has very good elasticity and is not rigid like liquid nails.

    "...It’s flexible, so it won’t crack and it doesn’t peel. You have to put effort into cutting it with a blade...." Read more

    "...Very strong, good flexibility." Read more

    "...Have been able to paint it after drying also. Sticks very well and remains flexible , only downside is the cost." Read more

    "...The Sikaflex hardens into something that resembles tough rubber. It flexes and is not rigid like Liquid Nails...." Read more

    11 customers mention7 positive4 negative

    Customers are mixed about the value of the caulk. Some mention that it's a good price and a very good investment, while others say that it is over priced.

    "...I would assume it’s a decent price, I just don’t have anything to compare to. Would definitely buy again.. and have." Read more

    "Price is high" Read more

    "...A very good investment." Read more

    "...The price was discounted and I was able to use it so I can't say it was misrepresented." Read more

    20 customers mention0 positive20 negative

    Customers are dissatisfied with the color of the caulk. They mention that it was white and not black as requested, there is no color indication on the product, and wine discolors the white color.

    "This is a great product but unfortunately the tubes were mislabeled white but are really black." Read more

    "Sikaflex 221 is excellent, but Amazon does NOT label the colors correctly...." Read more

    "Like several other reviewers, I received the wrong color. I ordered white. Plastic overwrap says white but the tube says gray...." Read more

    "...it as black, but when I broke the seal and went to use it the contents were white...." Read more

    14 customers mention0 positive14 negative

    Customers find the caulk difficult to remove. They mention that it spreads easily and is hard to remove from the tube. Some say that the cauk is very thick and hard to squeeze out of the tube, making it impossible to extract.

    "It has a nice consistency, but it is almost impossible to get it out of the tube.I wished it was a bit thinner...." Read more

    "...It can be tough to remove but with some solvent you just take a little at a time an it eventually comes loose...." Read more

    "...instructions and wear gloves to keep it off your skin, it is difficult to remove." Read more

    "It was tough to get out of the tube (compared to caulking) but the repair is strong and not going anywhere. I'll buy it again if ever needed." Read more

    Do not use if you want to remove it later
    5 Stars
    Do not use if you want to remove it later
    I found this to be an excellent product. It was easy to apply and tool for a nice look. I used it to attach fenders to a sub-structure and believe the fender would break before the adhesive fails. It is important to follow the instructions and wear gloves to keep it off your skin, it is difficult to remove.
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    Top reviews from the United States

    Reviewed in the United States on March 21, 2024
    Color: WhiteStyle: CompactVerified Purchase
    Reviewed in the United States on October 7, 2023
    Color: BlackStyle: CompactVerified Purchase
    4 people found this helpful
    Report
    Reviewed in the United States on February 27, 2024
    Color: WhiteStyle: CompactVerified Purchase
    Reviewed in the United States on March 27, 2024
    Color: Aluminum GrayStyle: CompactVerified Purchase
    Reviewed in the United States on March 13, 2024
    Color: WhiteStyle: CompactVerified Purchase
    Reviewed in the United States on February 3, 2024
    Color: WhiteStyle: CompactVerified Purchase
    One person found this helpful
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    Reviewed in the United States on February 25, 2024
    Color: WhiteStyle: CompactVerified Purchase
    One person found this helpful
    Report
    Reviewed in the United States on March 18, 2024
    Color: BlackStyle: CompactVerified Purchase

    Top reviews from other countries

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    Vera R.-Toronto
    5.0 out of 5 stars Excellent product.
    Reviewed in Canada on February 8, 2024
    Color: BlackStyle: CompactVerified Purchase
    alvaro
    5.0 out of 5 stars Excelente adhesión
    Reviewed in Mexico on August 3, 2023
    Color: BlackStyle: CompactVerified Purchase
    One person found this helpful
    Report
    Kym Healy
    5.0 out of 5 stars sikaflex is the BOMB
    Reviewed in Australia on November 27, 2023
    Color: BlackStyle: CompactVerified Purchase
    Jamie Rowe
    5.0 out of 5 stars Best sealant
    Reviewed in Canada on December 3, 2023
    Color: BlackStyle: CompactVerified Purchase
    One person found this helpful
    Report
    César Téllez
    5.0 out of 5 stars Excelente
    Reviewed in Mexico on July 31, 2023
    Color: BlackStyle: CompactVerified Purchase