Sealant below alloy mast step:

[Krusty]

I have a cracked alloy mast step being repaired by welding (bolted to a steel jig to keep its shape and dimensions!)
Next comes its re-fit, and I would welcome advice on the best sealant to use between it and the coachroof: to be both stiff and watertight when cured.
I'm sure there must be good experience out there. Thanks, in anticipation.

 

[graham]

Sikaflex is generally regarded as a good sealant. Dearer than ordinary Silicon but good stuff.

 

[Talbot]

trouble with Sika is the great difficulty in getting it apart.


I much prefer Wurth adhesive sealant.

 

[cookjwm]

We use that at work .....very good stuff - the only way we can get it apart is to cut the joint. No solvents either

 

[Krusty]

Thanks for inputs.
I have used some Sikaflex and know it bonds well: too well!
The mast step may have to come off again sometime, which is why I am looking for a seal which is watertight but not too difficult to separate.
Maybe the best bet is a neoprene gasket and a water-repellent synthetic grease?

 

[Aja]

I have just spent 3 (three) days separating my cockpit sole which was bedded on sealant.

I managed not to damage the gelcoat too much! When separating sealant it adheres so much that it binds to the grp. Incredible properties!

Be careful/sparing if you use Sika. You dont need much.

Donald