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Old 14 February 2012, 16:55   #11
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That silkaflex might stop someone nicking your engine kerny even if they cut the bolts Yam 90 transom bolts was well sealed with sika. Removed the bolts, nothing happened, engine did not move. Tried to lift the engine a litle, boat followed....Had no other option than to separate the engine from the transom with a chisel ? Sika is pretty strong stuff..
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Old 22 February 2012, 14:12   #12
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am i right in saying that a general silicone sealent is no good for the job and you have to use sikaflex?
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Old 22 February 2012, 14:14   #13
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am i right in saying that a general silicone sealent is no good for the job and you have to use sikaflex?
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Old 22 February 2012, 14:18   #14
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Disagree actually. Whilst Sikaflex is far better as an adhesive, properly applied quality silicone would be just as good, possibly even better as it has a much lower modulus and will therefore accomodate more twisting, flexing or stretching before it parts company. I would say either sealant is fine so long as it is well applied and the surfaces it was applied to were clean.
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Old 22 February 2012, 14:43   #15
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Disagree actually.

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Old 12 April 2012, 02:32   #16
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On fitting my new elephants trunk yesterday I used a Marine sikaflex to seal the hole I had drilled with the hole saw applied with a finger (gloved finger) prior to gently tapping the pipe into the hole and sealing at both ends. Prob a better seal than a bolt but the main thing I would say is getting plenty pf sealant in there so when the bolt is pushed through there is still sufficient sikaflex in there to coat the surfaces to create a good seal. Bargain for the Sikaflex 291i at my local 'Scott Bader' 5.51 +VAT for a 300ml cartridge.
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Old 12 April 2012, 02:35   #17
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The sika 291i looks like the perfect stuff for the job:


Applications for Sikaflex 291i 300ml- Marine Sealant.
  • Bedding of Deck Hardware
  • Sealing & Bonding Above and Below the Water Line!
  • Can be used as a general sealant
  • Sealing plumbing and sanitary equipment sealing joints including keel/hull, stern shaft tube, bonding deck to hull
  • Excellent for bonding anti-slip man-made decking materials including Marine Deck 2000
Advantages & Benefits of Sikaflex 291i 300ml Marine Sealant:
  • Use above and Below the Water Line
  • Resists Salt Water
  • Fast Strength Build up
  • Stable
  • Paintable
  • Sandable
  • Excellent Bond Strength
  • May be squeezed or brushed into place
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Old 12 April 2012, 05:56   #18
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Originally Posted by Divertris View Post
The sika 291i looks like the perfect stuff for the job:


Applications for Sikaflex 291i 300ml- Marine Sealant.
  • Bedding of Deck Hardware
  • Sealing & Bonding Above and Below the Water Line!
  • Can be used as a general sealant
  • Sealing plumbing and sanitary equipment sealing joints including keel/hull, stern shaft tube, bonding deck to hull
  • Excellent for bonding anti-slip man-made decking materials including Marine Deck 2000
Advantages & Benefits of Sikaflex 291i 300ml Marine Sealant:
  • Use above and Below the Water Line
  • Resists Salt Water
  • Fast Strength Build up
  • Stable
  • Paintable
  • Sandable
  • Excellent Bond Strength
  • May be squeezed or brushed into place
So..Chris was Right in the first place!
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Old 12 April 2012, 12:22   #19
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The Sikaflex 291i(i-cure) is IMHO very different from the stuff before i-cure times... The old stuff bonded stronger. This can be good or bad, pending on application. As a sealant guess its even better as easier to remove case needed.

Hope that 292i (i-cure) have not lost the original properties of 292 that much.
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