Silicone sealant

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itsonlymoney

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Is there a marine grade white sealant to use on my rubbing strake ?
Made the mistake about 2yrs ago to use white silicone sealant but its gone black and looks a mess.
Ian
 
Forget silicon. It has no place in the marine environment - as you have discovered! Use a Polysulphide type sealant such as Sikkaflex - its much stronger, more durable, and comes in several colours - black, white grey or brown! Quite a few of us have been to the local Builders merchants and find building grade Polysulphide works fine above the waterline (and often below too) at about 1/3rd the cost of having the word 'Marine' printed on the tube!
 
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Forget silicon. It has no place in the marine environment

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WHAT A LOAD OF OLD TOSH!!

It all depends what silicone sealent you use, if your gona go to B&Q or your local builders merchants then yes forget silicone sealent!!
BUT
If your clever and actualy do a little reaserch into the different types and grades off silicone sealent availible......
Hey Presto you will find exactly what your looking for!
The Name - Silicone Marine Sealent
Uses- Above and below the water line
High modulus - so it wont go mouldy or black
Approval - BS 5889 and ISO 11600
Make - Rhodorsil
Distributer - Marine & Industrial LLP
Telephone - 01692 406822

Easy when you know how!!
 
Regarding polysulphide....I used this to fix the replacement perspex into a hatch ..I did this three days ago ,however the stuff still is very soft and sticky.I would like to trim the excess away ..Can anybody tell me how long it normally takes to cure?? It is" Evostick one part polysulphide"
 
Temp probably too low to cure it properly at the moment. Can you warm it with a hairdryer?
 
There's no problem with silicone rubber from a builder's merchant provided is is one which evolves acetic acid (vinegar smell) on curing. It is a bit more expensive, but the acetic acid etches the surface microscopically and gives a good bond. They normally sell this as well as "odourless" bath sealant. Make sure it says acetic acid on the pack.

By the way, high modulus has nothing to do with mould or discolouration - it defines the non-slump properties.
 
Thanks for your reply Col..I have been keeping it in the warmth since I did the job,but it seems to be takung forever to cure.
 
The very best is 3m UV4000 it self etch primes to stainless (no other white sealent does this) its strong wont go yellow and wont crack. It isnt that much more expensive than sikaflex either.

Its def the best out there. Rick P used some recently so he can give you a good idea.

Dom
 
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