CT1 adhesive sealant??

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bluedragon

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Our local chandler is promoting this product http://www.ctecuk.co.uk/ct1_info.pdf as a possible replacement for Sikaflex in marine applications. Has anyone ever heard of it / used it? Main features of interest are a) can be used in wet conditions or even underwater b) supposedly has a lot longer usable life once opened (though it doesn't claim that on the data sheet). Costs about £10 per cartridge. Wouldn't mind giving it a try to seal around a wooden coaming, but has anyone any experience of it??
 
[ QUOTE ]
APPLICATIONS
• For all applications, including bathrooms and general building maintenance CT1 replaces: mounting, wood and P.U. adhesives, silicone sealants,, sanitary silicone sealants, acrylic sealants, butyl rubber sealants.

[/ QUOTE ]Sounds like "builders silicone" to me so why not use one of the £2.16/tube range from you local builder's merchant or online at www.toolstation.com /forums/images/graemlins/grin.gif
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Artificial Intelligence is no match for Natural Stupidity
 
I don't think Cliff is right in suggesting that it is the bog standard builders silicone. That would fail to do many of the things claimed for C·T·1. The data sheet says it is an MS polymer. MS standing for Modified Silicone.

But what that is I don't know. There seems to be a wide range of adhesive sealants around that are MS polymers. Presumably they are a step up on the "builders silicone" which certainly does not have any great bonding properties.

I think it would be interesting to try C·T·1 in an application where you might just use a silicone but would prefer something better before using it as an alternative for a Sikaflex product.

Report back with your experiences !
 
I spoke to their local rep before trying it, have also used it as sanitary sealer (my work).
It does what it says, so far so good on marine side, major benefit besides colours is you can over paint it and it does not go hard.
 
I have been using Evostick "Sticks like S**T" at work and last year took a tube to the boat,using it to fix rubber fendering to the stern (grp) It did indeed stick as advertised ,and is still doing the business this year. After a winter the tube was still usable,it had not gone off ,and best of all it is about a fiver a tube from your local Builders merchants. So may be worth considering as an alternative to Sikaflex,which has virtually no shelf life after you open the tube,and is expensive.
 
/forums/images/graemlins/laugh.gif

Still sounds to me like "Builders Silicone" even be it MS type. There is quite a range of MS builders silicone / caulking available these days.

I am still of the mind it falls under the category of ...........

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Only way to know for sure is to try a tube or two /forums/images/graemlins/grin.gif
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Artificial Intelligence is no match for Natural Stupidity
 
Yes, the usable life of an opened Sikaflex cartridge is a real gripe for me. I don't mind paying £10 if it lasts a year, but the only way it keeps is in the freezer (which isn't much good on the boat). Generally I avoid silicone for many applications for paintability and surface contamination reasons.
 
Ok so this is an old post but thought I would add some info, Last year I used CT1 to seal around a new bolt on the rudder stock, this year I replaced the bush and the other 2 bolts, when i removed the bolt sealed with CT1 the sealant was still in place, flexible and had kept water out. The best bit though was that I am still using the same tube!
 
It's amazing stuff. It does work underwater, sticks to anything, acts as an adhesive as well, has no VOCs (doesn't give off nasty volatile compounds) so safe on food surfaces, wipes easily off fingers leaving no residue and stays flexible. Comes in loads of colours, including clear (and I mean CRYSTAL clear).

You can get it online delivered from some retailers for about £8. Mine has remained usable without any hardening in the tube at all. Phenomenal stuff.
 
It is good stuff but it doesn't go hard like sikaflex it also stays White for longer, not sure I would use it underwater due to the fact it doesn't go hard. The thing I really like about it is that a week after you used it you can still clean up easy.

I get mine from city electrical factors, is fairly cheap. It's not a replacement for sik but above water it does.
 
ct 1

Very good stuff and works underwater extremely well, used for sealing leaks in swimming pools.

Also been used in MOD establisment in Hampshire to seal joints in very large water tanks.

TRhe clear version is actually clear you can see through it without distortion.

Saw it being used to stick a 3ftx3ft slab to a wall and a very strong lad being asked to pull said slab from wall. The slab is still there I believe! Just 4 blobs to stick it.


J
 
Not resistant to chlorine - don't use in pools.

joha said:
for sealing leaks in swimming pools.
Click to expand...

hi there - I just wanted to say - do not use CT1 for sealing swimming pools!

I was sucked in to the marketing and used it to repair a temperature related crack in a pool that hadn't been used for a while - on their datasheet here: http://www.ct1ltd.com/phocadownload/new ct1 tech data sheet 18-06-2012 master.pdf

they say it has 'moderate' resistance to chlorine, but I can assure you it does not, it has terrible resistance to chlorine! It barely lasted a month.
sure it's fine for salt-water which I guess most of this forum's users are looking at it for, just:

DO NOT USE CT1 SEALANT IN SWIMMING POOLS!

hope this helps someone out...
 
Not resistant to chlorine - don't use in pools.

joha said:
for sealing leaks in swimming pools.
Click to expand...

hi there - I just wanted to say - do not use CT1 for sealing swimming pools!

I was sucked in to the marketing and used it to repair a temperature related crack in a pool that hadn't been used for a while - on their datasheet they say it has 'moderate' resistance to chlorine, but I can assure you it does not, it has terrible resistance to chlorine! It barely lasted a month.
sure it's probably fine for salt-water which I guess most of this forum's users are looking at it for, just:

DO NOT USE CT1 SEALANT IN SWIMMING POOLS!

hope this helps someone out...
 
Just wanted to contribute to some thread necromancy, as I used this last weekend.

I wanted to bodge repair a speed log through hull, but could only have her out for about 5 mins.

I lifted the edge, and squirted a load of CT1 into the gap, and within 5 minutes, lowered her back into the water, with completely uncured CT1 sealing it.

This week, I pulled her out again, and the CT1 looked perfect, it had completely gone off, but still felt rubbery and flexible, like silicone..

if it all alls off in 6 months, I'll let you know!
 
I've been using CT1 for several years now and have posted on here before now about how good it was instead of Sikaflex. It sticks to just about anything and even if it is wet too so you can actually apply it underwater which you cannot do with Sika.

I always used Sika for the joint betweem my bilge keels and the hull, which needs a bit of flex, and the Sika had to be raked out and replaced every year. I put CT1 in four years ago and it is still as good as new.
 
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