TotalBoat Seal Marine Sealant
Sikaflex 291
Sika Sika
  • Sikaflex 291
  • Sikaflex 291 - Small

Sikaflex 291

Sika 291 is a Professional grade Marine Adhesive/Sealant used by boat builders and yards to bond and bed boat components structurally. Fast strength build-up overnight. Use above and below the waterline. Comes with nozzle. All purpose adhesive sealant, bond to hull & structural members. Bedding Compound, light bonding, fast cure polyurethane sealant.

NOTE: SIK-291201W is a 20oz. Sausage Pack, which is NOT compatible with standard caulking guns.

 
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Tech Spec Product Info User Generated Content
    Technical Specifications
  • Density: 10.3 lbs per gal
  • Tack Free Time: 60 min.
  • Rate of Cure: 1/4-in x 1/4-in bead 9 days at 40F/30% R.H.
    1/4-in x 1/4-in bead 4 days at 73F/50% R.H.
    1/4-in x 1/4-in bead 3 days at 73F/70% R.H.
    1/4-in x 1/4-in bead 1 day at 100F/75% R.H.
  • Shore A Hardness (ASTM D2240): 45-50
  • Elongation at Break (ASTM D412): >600%
  • Tensile Strength (ASTM D412): 221 PSI
  • Lap Shear Strength (ASTM D1002): 165 PSI
  • Peel Strength: 35 lbs/in on fiberglass, 25 lbs/in on gelcoat
  • Application Temperature: 40F to 110 F
  • Service Range: -40F to 190 F
  • Color: Black, White
  • Sandable, paintable and is waterproof
  • Below Water Line (yes/no): Yes
    BRAND: Sika
    Material: Polyurethane
    Rate Of Cure: Fast
    Strength: Good
    Type: Adhesive
    Usage: Bonding
    4.8 13

    Rebeding Deck Screws

    4

    Was not packaged well by Jamestown , almost not usable!!!

    Cap'n Ed

    Toms River, NJ

    Perfect sealant

    5

    Use this sealant to install thru hulls and seacocks.

    DAVIDL

    WINTERVILLE, NC

    Yes

    USED FOR EXHAUST DUCT ON STERN

    4

    VERY THICK STUFF MAKE SURE ITS WARM BEFORE USE

    PEN YAN

    BOAT IN LAKE ONTARIO

    If it's good enough for Marshall Marine.

    5

    This stuff is fantastic. Fairly priced and very effective. It sticks and ages very well. I use it mostly for betting deck hardware.

    tennesseejed3

    Stow, MA

    Yes

    Works as described

    5

    I use it for trim around any hardware I put on my boat as well as over the bolts to keep down saltwater corrosion.

    ESM

    Qatar

    Yes

    GOOD STUFF!!

    5

    Used this to re-caulk decking on my boat prior to applying deck paint. Sika products are all I use when caulking.

    ADEggman

    Agua Dulce, California

    Yes

    Sikaflex for bonding Treadmaster

    5

    Used Sikaflex to bond Treadmaster non-skid material onto a rebuilt bridgedeck. Used a trowel to spread evenly - an easier task than I thought it would be. Sikaflex was less "runny" than I anticipated so clean-up was a breeze as there was little mess.

    Distant Star

    Milwaukee, WI

    Yes

    Usages Galore

    5

    Not only for marine applications but for interior as well for bathroom, kitchen, washroom...perfect to keep woods dry from termites. In the trash goes that old hardware store caulking. The reliability and longevity of this caulking is GREAT !!

    Kandoo Mike

    San Jose, CA

    Yes

    great fix for plastic boats

    5

    I used it to make a repair on an old coleman canoe. It is as easy to use as silicone, but much more durable. I have been trying different things on this boat for years, and I finally found something that works.

    leaky canoeman

    Pueblo Co.

    Yes

    Just what we were needing :-)

    5

    we knew the type of product we needed but didn't know what we needed... Chatted with someone on line telling them our needs and this was the product that we were looking for...perfect match guys.. the boat is coming along great..standing up under water and still staying fexable... helps seal the screws perfect for what we needed

    Dan

    Ohio

    Yes

    Sikaflex 291

    4.813

    100.0

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