polyurethane car seam sealer

[europe172]

Has anyone here used polyurethane car seam sealer insted of silkiflex?
If so how did you find it?
what is the life in marine enviroment?

 

[CAPTAIN FANTASTIC]

No, I have not tried car polyurethane, but I have tried Marineflex which is excellent stuff, and good value.

 

[TimBennet]

http://www.toolstation.com/shop/Adh...e+PU40+Sealant+310ml+White/d180/sd2350/p67949

 

[smeaks]

I have used Pu sealants from building merchants for years. Used it to fix and seal a plywood deck plate to fibreglass. Mad a good job and is still good years later... Though more than can be said for the paint I used on the wood!

 

[antares]

ct1 sealant

I used CT1 sealant on the hull to keel joint which had been problematic with all sorts of sika and 3m 5200 in previous years . Excellent results with that stuff

 

[europe172]

Thanks for the feedback
So if I have it correct
Polysulfide sealants are hard rubber
Polyurethane sealants are soft plastic

Final question
What could be used to clean up polyurethane overspill

 

[Tranona]

No. That is too simplistic. Generally Polysulphides do not set solid and are sealants. There are many different types of Polyurethane both adhesives and sealants. You need to consider the application and choose your sealant or adhesive to suit.

 

[vyv_cox]

http://www.toolstation.com/shop/Adh...e+PU40+Sealant+310ml+White/d180/sd2350/p67949

I have used this quite a lot now, in UK and in Greece. It seems indistinguishable from Sikaflex 291 to my eyes, at well under half the price. Unfortunately it's just as messy to use.

I intend trying CT1, which has the big advantage that it can be used on wet surfaces.

Polysulphide and polyurethane are both elastomers. Polysulphide is supposedly better under water and in some cases can accommodate more movement. You have two choices for cleaning up, either wiping with a rag or paper before they cure or waiting and cutting off the hardened material afterwards. Depends a little on the surfaces, on smooth grp or glass I usually do the latter.

 

[PCUK]

Wonder wipes remove just about everything before it cures, from surfaces and hands!

 

[gljnr1983]

I have found automotive panel wipe to be the best for cleaning up mess,while the sealant is still wet.

 

[savageseadog]

What I have found from using some, it sets more quickly than the standard marine Sikaflex I've used and the white tended to go yellow in the sun. This may not apply to other automotive PU's.