www.fixtech.com.au/

FixTech FixSeal MSP15 - White has worked well for my boat

Can someone please remind me why we cant use Roof & Gutter silicone on boats?. the grey one has excellent UV resistance (far better than sika291).

If the reason is because nothing sticks to silicone(or where it has been), im still not seeing a problem as silicone lasts for 20yrs when applied right.
cheers

DAMA said..
www.fixtech.com.au/

FixTech FixSeal MSP15 - White has worked well for my boat

+1

BlueMoon said..
Can someone please remind me why we cant use Roof & Gutter silicone on boats?. the grey one has excellent UV resistance (far better than sika291).

If the reason is because nothing sticks to silicone(or where it has been), im still not seeing a problem as silicone lasts for 20yrs when applied right.
cheers

Because it has silicone in it. Silicone is good for fish tanks and some engine gaskets but otherwise should not get near a boat.

Been using T-REX adhesive sealant for a while now, sticks like s#!t to a blanket ! So far anyway

If the sealant is going to be in compression between the base plate and the deck (ie. strong adhesion not needed), then pretty much any compound that will NOT HARDEN over time should make a seal if you apply it nicely.

I think Sika 291 and Fixtech will work much the same in that application, so if I had one I would use it instead of buying another.

Silicone will also work since it remains nice and soft (maybe even more so that the others), but once silicone has touched that area of deck, we all know it would be difficult to get paint or even an epoxy repair to stick to that area in future. So nothing wrong with the performance of silicone in a compression seal like that, just the risk that you may want to remove it and get anything else to stick to that surface in future would put most boat owners off using it.

But isn't Butyl it a tape?
I need a paste so it will squeeze down the holes and seal around the screws/bolts.

keensailor said..
But isn't Butyl it a tape?
I need a paste so it will squeeze down the holes and seal around the screws/bolts.

Butyl can also be had as a mastic.

Did an experiment a few years ago using butyl, (not the proper stuff you can buy for yachts, but the stuff you bed down kitchen sinks with...it might be the same stuff??)
I detailed the process(same as FreeRadical posted) here : www.tophatyachts.com/viewtopic.php?f=6&t=588

wow that was over 4& a half years, checked it the other day & no leaks! (the alloy cleat has aged a lot tho'!), as with all methods I think the key is to counter-sink the hole.

Ok, so can anyone tell me where to get butyl tape in Australia please....?
regards,
Allan

I'm now thinking I might give the Butyl tape a go with the countersunk method. Otherwise Fix it 15 for sure.

Yeah I used SIKA 291 to seal around the deck hatch when I replaced it. It does'nt leak and I think it was good for this role.

However I used it around the anchor light wires which disappear down into a hole in the mast foot and it has gone real chatty and started to leak. I think in this case it was too exposed so am I unsure how UV resistant it actually is.