Seam sealer .

[BIG DOG]

What's a good brand seam sealer ? I know anything that is made today is probably better than the 30 year old stuff I scraped off.All the auto and paint places here have a different type Pro form,Ap,UAP brand ......I would like it in a tube as I want to make a nice sealer joint/line where my floor pans meet the frame connectors.This will be on the bottom of the car painted but I want it to stay there forever.Is one any better than the other?Some are made to take some flexing where others recommend against it.I would think that the one that takes the flexing would be a better sealer .I would also like to use it on the top side along the floor seams .I believe that I will be able to brush it along with a stiff brush after I squeeze it out . Any info or input would be appreciated!
Thanks!

[eldubb440]

i like anything made by 3M ........
http://solutions.3m.com/wps/portal/3M/en_US/3MAutomotive/Aftermarket/Products/Product-Catalog/?PC_7_0_53BC_root=GST1T4S9TCgv&PC_7_0_53BC_output=html&PC_7_0_53BC_gvel=6DTWTJQPBBgl&PC_7_0_53BC_vroot=GSLPLPKL4Xge&PC_7_0_53BC_node=GSWMS8NB1Nbe&PC_7_0_53BC_theme=en_US_aad_portal&PC_7_0_53BC_command=CustomizePageHandler

[doug 371]

i'm using 1 now called sikaflex (SP) i like it, doesnt seem to shrink like some of the cheaper ones