Which Sikaflex

C

crown22

Well-Known Member
Joined
19 Jul 2004
Messages
292
Location
Manchester
Visit site
Hello
I need to fix some replacement hardwood strake to my deck hull joint.Is there a Sikaflex product that I should be using?The strake will be screwed as well but I imagine that some adhesion will help while I am screwing.There is a moderate curve to overcome but I am hoping to get away without steaming the sapele. The use of ratchet straps under the boat to hold the wood in place While gluing and screwing has also been suggested . Might be able to use G clamps .Boat is out of the water.Thanks again.
 
crown22 said:
Hello
I need to fix some replacement hardwood strake to my deck hull joint.Is there a Sikaflex product that I should be using?The strake will be screwed as well but I imagine that some adhesion will help while I am screwing.There is a moderate curve to overcome but I am hoping to get away without steaming the sapele. The use of ratchet straps under the boat to hold the wood in place While gluing and screwing has also been suggested . Might be able to use G clamps .Boat is out of the water.Thanks again.
Click to expand...

Sikafex 291i is probably the most appropriate adhesive sealant from the Sikaflex marine range

but see the following

https://www.bluemoment.com/downloads/sikaflexusersguide.pdf

https://www.bluemoment.com/downloads/sikaflexmarinehandbook.pdf

https://ita.sika.com/dms/getdocumen...ika Marine Application Guide 2012_low_low.pdf


You may be able to save a little money by using something similar from the Sika industrial or construction ranges or something readily avaialble from toolstation or screwfix.

Puraflex 40 is a similar adhesive polyurethane sealant from Everbuild, one of the Sika group companies. https://www.toolstation.com/shop/p85566?searchstr=puraflex
 
crown22 said:
Hello
I need to fix some replacement hardwood strake to my deck hull joint.Is there a Sikaflex product that I should be using?The strake will be screwed as well but I imagine that some adhesion will help while I am screwing.There is a moderate curve to overcome but I am hoping to get away without steaming the sapele. The use of ratchet straps under the boat to hold the wood in place While gluing and screwing has also been suggested . Might be able to use G clamps .Boat is out of the water.Thanks again.
Click to expand...

If you haven't already, have a GOOD look at a trade product called CT1 from Ireland. It's packed like Sika, looks like Sika, feels like Sika, smells like Sika. BUT.... In the last 6 or 7 years I've been using it aboard for almost everything, its done a MUCH better job than Sika. In recent years, I've been very disappointed with the results obtained with various types of Sikaflex. Especially the UV item for sealing hatches and windows etc. I won't even begin to list what I've repaired with CT1 on the boat and at home. Seriously, watch their YouTube promo videos. I was extremely sceptical when I did. Believe what they say - it does EXACTLY what is say on the tin!
And no, I have nothing to do with them;-) I'm just an extremely happy customer. Let me know if you want any more details.
 
may have to try that. looks about the same price as Sika, but i always find sika a waste, it always sets in the tube after its been used. i recently bought a small tube for £10 as thats as dear as getting a normal tube that sets after short use
 
Dougal said:
If you haven't already, have a GOOD look at a trade product called CT1 from Ireland. It's packed like Sika, looks like Sika, feels like Sika, smells like Sika. BUT.... In the last 6 or 7 years I've been using it aboard for almost everything, its done a MUCH better job than Sika. In recent years, I've been very disappointed with the results obtained with various types of Sikaflex. Especially the UV item for sealing hatches and windows etc. I won't even begin to list what I've repaired with CT1 on the boat and at home. Seriously, watch their YouTube promo videos. I was extremely sceptical when I did. Believe what they say - it does EXACTLY what is say on the tin!
And no, I have nothing to do with them;-) I'm just an extremely happy customer. Let me know if you want any more details.
Click to expand...

But is a silicone co-polymer unlike Sikaflex 291 which is a polyurethane

Everbuild ( a Sika group company) StixAll is similar to CT1 https://www.toolstation.com/shop/p77137?searchstr=Stixall
 
I have also used Puraflex 40 instead of Sika in the last few years and have no complaints. Remember to keep a packet of baby wipes to hand when applying it. A great way to clear up the inevitable mess.
 
I'm also still using three colours of CT1 that I OPENED last year, and are still perfectly useable. I could never do that with Sika, however well I sealed it. All I do with the CT1 is place a tiny dab of clear silicon grease over the end, and screw on a cap. I've used used clingfilm, but not to such good effect. The brown tube I'm currently using has been open for over 18 months.

Oh, and did I tell you, it can be applied (and still work), under water:-))) I now also use it in place of Butyl tape. Had no leaks yet.
 
Not tried CT1, but use a lot of Sika 11FC, a PU mastic glue. They originally sold it as a glue for Roman type roof tiles, to stop them sliding down the roof, so it sticks to damp unglazed pottery. It really sticks to anything I have tried, except a type of poly plastic I used for a small roofing project. And, it really sticks to skin...
 
Dougal said:
If you haven't already, have a GOOD look at a trade product called CT1 from Ireland. It's packed like Sika, looks like Sika, feels like Sika, smells like Sika. BUT.... In the last 6 or 7 years I've been using it aboard for almost everything, its done a MUCH better job than Sika. In recent years, I've been very disappointed with the results obtained with various types of Sikaflex. Especially the UV item for sealing hatches and windows etc. I won't even begin to list what I've repaired with CT1 on the boat and at home. Seriously, watch their YouTube promo videos. I was extremely sceptical when I did. Believe what they say - it does EXACTLY what is say on the tin!
And no, I have nothing to do with them;-) I'm just an extremely happy customer. Let me know if you want any more details.
Click to expand...

+1
 
Sika 11FC is good, I use it a lot but CT1 is more user friendly. Tube life of CT1 is months with the cap on, Sika 11FC is weeks and the tube is solid. CT1 works well in the wet, Sika likes it dry. Only down side is that CT1 is a pain to get a neat finish as it sticks to fingers and lolly sticks, fairy or not. You have to use the CT1 solvent spray if you need a really neat bead.
 
UK-WOOZY said:
may have to try that. looks about the same price as Sika, but i always find sika a waste, it always sets in the tube after its been used. i recently bought a small tube for £10 as thats as dear as getting a normal tube that sets after short use
Click to expand...

Store in the deep freeze.

Mot of these adhesives suggest clean up with soapy water, its not very user friendly and turps is much quicker - never use turps - it seeps under the sealant and reduces bond strength. Again - many of these adhesives set off with water - o water cleanup i advantageous.
 
CT1 is what you are after. Franchises in England and Scotland now. My friend owns the Scottish one. Great stuff. I’ve even repaired a leak on the tubes of my inflatable dinghy with it. Incredible.
 
The old goto Sikaflex 291i (and the identical Puraflex) are not that great it turns out. Now that we're in high UV regions, the black stuff is chalking off frighteningly fast, some of it after just 6 months. The white one less so, but it seems excessively easy to rub off with just my finger and dirt sticks to it a lot more than I like.

I've had a cartridge of Sabatack 750XL which I've used for some similar jobs and that seems to stand up to the sun a lot better. It's a MS polymer I believe, rather than PU. My future caulking purchases would therefore prefer that sort of thing, although often it's down to whatever the local chandlery has in stock at the time you need it. We do carry a box of various goops in the bilge, which keeps them relatively cool and durable (our bilge is not wet, usually), and I tend to conjure half-spent tubes back to life with corkscrews, screwdrivers and grim determination.

Sika is good under the waterline though, where UV is less of a problem. Did all the new plastic seacocks with it and no issues whatsoever.
 
You must log in or register to reply here.

Share this page

Top