Sealants Again

[Torquemada]

Any recommendations for inner wing sealing? I used Polycell exterior squeezable a few months ago, but it is turning brittle with the heat, and the rivers are flowing again.
Can Thompsons Gutter Seal take the underbonnet heat long term, or is a higher spec marine sealant worth going for?
Thanks in advance for any advice.

[incorrigible]

Sicafex or Tigerseal poyleurothane sealant (not silicone)

I've used this extensively over the years and think it's brilliant, although some people have hade application problems

Someone else was recommending a marine silicone sealant, although I reckon that's better at combating the effect of sea water rather than high temperature (based on no evidence at all I hasten to add)

Personally I don't like silicon, beacause of the paint reactions it causes

[zippy500]

this is good stuff apparently, I got it from a previous post on a similar thing.

www.decoratingdirect.co.uk/viewprod/b/BITHA6/

[K3NJW]

Can thoroghly recomend the goo on the above link, I found the stuff in the first place. Having put my rear lenses on with it a while agao, and liberally smeared under the bonnet I can vouch for its effectiveness. As above, can make no comment on its temperature resistant qualities, other than it's around my brake fluid resevoir and has shown no degeneration under there.

I can confirm that the gutter sealant is positively NOT the route ..... it doesn't cure.

[Torquemada]

Thanks for the help. Anyone know if the HA6 RTV sealant is available other than mail order? £5 p&p on a £2.10 tube ??
Thanks

[swilly]

I used bog-standard black silicon sealant form B&Q back in November and have found it to 1) do the job required 2) stay in good condition ie firmly flexible ?! with no hint of hardening/brittleness due to the heat 3) maintained the seal.

Also during application a big bead of sealant was used, and then the edges of said bead where protected with smaller beads leaving no open edges.

[simon.b]

I also use standard B&Q silicon, cheap and readily available in lots of nice colours.

I know there are issues with over-painting and supposedly damage to adjacent painted surfaces. However I don’t know where or why you would want to over paint (not on my Griff any way) and have never personally experienced adjacent paint damage.

Cheers,

Simon.

[Torquemada]

Dropped into the local yacht chandler and picked up something called Sikaflex 291 Polyurethane Marine Sealant. Wondering if I've made a mistake - anyone tried this? It's described as an elastic adhesive sealant - the 'adhesive' bit is putting me in two minds as to whether to return it. Sounds as if it may be too permanent?

[plipton]

Torquemada said: Thanks for the help. Anyone know if the HA6 RTV sealant is available other than mail order? £5 p&p on a £2.10 tube ??
Thanks

I bought some of this last month - frikking brilliant (but gets everywhere). I have used Sikaflex before - just as good (IMHO) but pricier. I got 4 tubes of HA6 and saved a few quid over the cost of Sikaflex.

BTW - are you a Marillion fan perchance?


>> Edited by plipton on Friday 28th February 16:23

[Torquemada]

Thanks for the info Plipton. Marillion? ....errr, you've lost me there, must be showing my age.

[andy43]

Halfords do a lime green tube of black silicone specifically designed for automotive applications, it costs about a fiver and doesn't need a gun - flexing the nozzle allows the sealant out. Done round my brake fluid reservoir and other bits and pieces(screen etc) and it seems like it sticks pretty good - recommended!