seam sealant

[holy85]

I was wonder what properties should a seam sealant have to be used on a car?, as I was wondering if there is an alternative sealant from the building trade that can be used at a cheaper cost that does the same thing?

What does PU in seam sealant mean?

Thanks

 

[holy85]

The sealants I'm looking at are

Tiger seal
Sikaflex
grip fill
master seal
final systems
starchem seam sealer

Does anyone know of any alternatives at a cheaper cost?

 

[Delgado]

I've only ever used Tiger Seal and Sikaflex and don't really have much to do with car panal repairs, but the PU stands for 'Polyurethane', so I'd guess that any Polyurethane Sealant would do a similar thing (although perhaps wouldn't be as good)?

 

[steveo3002]

tiger seal and sikalflex are good , halfords do upol grey stripe brush on which is ok

id not try and save a fiver by using building store sealer , will cost more in the long run when the job needs doing twice

dont forget to prime the seams first

 

[molten]

May not be the best in the world but I used this:
http://www.toolstation.com/shop/Adh...e+PU40+Sealant+310ml+White/d180/sd2350/p67949

cheap alternative. Not had any issues yet.

Cheers
scott

 

[philsmin]

May not be the best in the world but I used this:
http://www.toolstation.com/shop/Adh...e+PU40+Sealant+310ml+White/d180/sd2350/p67949

cheap alternative. Not had any issues yet.

Cheers
scott

can it be overpainted?

 

[Balders]

Bodyline PU sealer from Brown Bros, 'bout £4 a tube last time I bought some (2 months ago).

How much cheaper do you want it :-/

 

[graffian]

I used tigerseal/sikkaflex, I just tried the toolstation stuff and
it works great.

 

[the snooper]

as this is a disscusion on sealant its worth noting that some seam sealers should not be used directly on top of acid etch primers as any residue acid can weaken the bond and cause it to fail

 

[holy85]

thanks for the reply guys. I ended up buying tiger seal in the end. To be honest it didn't seem anything special. The seal didn't go hard as I was expecting it would. Next time I will try the seal molten mentioned just to compare results.

Also I was surprised to see that Tiger Seal contained Isocyanate.

 

[Omniata]

thanks for the reply guys. I ended up buying tiger seal in the end. To be honest it didn't seem anything special. The seal didn't go hard as I was expecting it would. Next time I will try the seal molten mentioned just to compare results.

Also I was surprised to see that Tiger Seal contained Isocyanate.

Was it a one part mixture or two parts? ie: A and B??

 

[holy85]

It was one part, like normal sealant you get in the tube. Do they come in 2 parts as well?

 

[steveo3002]

the whole idea is it stays like rubber so that it can flex with the car and not crack

 

[Omniata]

It was one part, like normal sealant you get in the tube. Do they come in 2 parts as well?

If it contained isocyanates as was 1 part it will be a 1 part moisture curing resin...
2 part types are available but not as easy to work with with isocyanates as the curing time tends to be very rapid for high strength resins, we're talking seconds not minutes...
Generally that's why epoxys are preferred as you alieviate the isocyanate risk as well and they are more viscous...


The 1 part systems are similar to what they use to glue the rubber granules together on kiddies playgrounds...


I spent a couple of years working for a manufacturer designing new ones that are common place on today's market and in use worldwide...


The strength of some of the resins is unbelievable, I still have some original test samples I created from 10 years ago and they haven't changed...

 

[Chickenjohn]

I was wonder what properties should a seam sealant have to be used on a car?, as I was wondering if there is an alternative sealant from the building trade that can be used at a cheaper cost that does the same thing?

What does PU in seam sealant mean?

Thanks

Go to your proper auto paint factors and get the proper seam sealer! It is designed for the job. PU means Poly Urethane, it is the polymer plastic contained in the sealer.

 

[Weldinator]

So do their sealers do a better job compared to Tiger seal ?

 

[Chipper]

In short, no.

 

[sprayerDrew]

I use two types of tubed sealer. A sealer on top of the epoxy primer to seal panel joins which have been welded, i.e isnide or underneath repairs this sealer goes fairly hard. And pu sealer ontop of my final primer but under the top coat in the outer body seems so the top coat flexes with the body