The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1947 - 1959 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-08-2018, 06:45 PM   #1
Matt_50
Registered User
 
Join Date: Jul 2017
Location: Joshua, Texas.
Posts: 1,303
Seam sealer

I'm getting my floor all done and I'm wondering if I need seam sealer. I butt welded as best I could, is seam sealer only for lap welds?

Would I be fine spraying primer and coating it? I was thinking of undercoating the bottom of the cab, and rhinolining the inside. Might be a while until I get carpet and I would think roll on rhino liner would be just fine under it.

Always open to advice. You guys have more experience than me.
__________________
1950 Build
Matt_50 is offline   Reply With Quote
Old 05-08-2018, 07:32 PM   #2
Daze57
Registered User
 
Daze57's Avatar
 
Join Date: Jul 2011
Location: Las Vegas - Nev. aka Sin City
Posts: 1,835
Re: Seam sealer

i would use seam sealer just for piece of mind ---you can never tell about pinholes or small separations --- just my opinion -- i used it on my 57 then used a good sealer on top of the whole floor ---- do it once and your good to good --- good luck on project
Daze57 is offline   Reply With Quote
Old 05-08-2018, 07:33 PM   #3
Matt_50
Registered User
 
Join Date: Jul 2017
Location: Joshua, Texas.
Posts: 1,303
Re: Seam sealer

Over bare metal?
__________________
1950 Build
Matt_50 is offline   Reply With Quote
Old 05-08-2018, 08:17 PM   #4
joedoh
Senior Member
 
joedoh's Avatar
 
Join Date: May 2007
Location: Doodah Kansas
Posts: 7,746
Re: Seam sealer

I use liquid nails fuze-it as seam sealer. it bonds anything to anything, in fact I use it to install the window felts, glass in the channel, everything. I used to use F26 construction adhesive but the fuze-it is superior.
__________________
the mass of men live lives of quiet desperation


if there is a problem, I can have it.

new project WAYNE http://67-72chevytrucks.com/vboard/s...d.php?t=844393
joedoh is offline   Reply With Quote
Old 05-08-2018, 08:44 PM   #5
Matt_50
Registered User
 
Join Date: Jul 2017
Location: Joshua, Texas.
Posts: 1,303
Re: Seam sealer

No kidding? Over primer too?

And whichever one I use, I need to do both inside and outside of the welds right? In cab and underneath?
__________________
1950 Build
Matt_50 is offline   Reply With Quote
Old 05-08-2018, 09:01 PM   #6
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,557
Re: Seam sealer

most seam sealer needs to have at least a coat of primer underneath....
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Old 05-08-2018, 09:16 PM   #7
MARTINSR
Registered User
 
MARTINSR's Avatar
 
Join Date: Dec 2000
Location: Boise, Idaho
Posts: 5,989
Re: Seam sealer

The typical application is prime it, then apply a seam sealer. You can step it up with a 2K seam sealer where it cures because it has a hardener. Or a 1k would be one that doesn't use a hardener. http://www.evercoat.com/product-deta...ber/100821/us/

The only 2k that I know of that doesn't require a special (not cheap) gun is Evercoat.
http://www.evercoat.com/product-deta...ber/100822/us/

Brian
__________________
1948 Chevy pickup
Chopped, Sectioned, 1953 Corvette 235 powered. Once was even 401 Buick mid engined with the carburetor right between the seats!
Bought with paper route money in 1973 when I was 15.

"Fan of most anything that moves human beings"
MARTINSR is offline   Reply With Quote
Old 05-09-2018, 10:26 AM   #8
Foot Stomper
Registered User
 
Foot Stomper's Avatar
 
Join Date: Oct 2015
Location: Calgary, Alberta
Posts: 1,252
Re: Seam sealer

Bare steel always and only needs epoxy primer. Any kind of seam sealer designed for automotive is best, and as Brian mentions, a 2K is best.

A single stage urethane paint would suffice as a top coat. I wouldn't use any kind of a bed liner product inside the cab because it serves no purpose, adds cost and is hard to remove should you want to. Unless your planning on throwing garden equipment, a yard of gravel or anything that can damage paint inside your cab, paint is all you need.
__________________
So when is this "Old enough to know better" supposed to kick in?

My 1959 GMC build thread http://67-72chevytrucks.com/vboard/s...d.php?t=686989
Foot Stomper is offline   Reply With Quote
Old 05-09-2018, 11:50 AM   #9
68blackbird
Registered User
 
68blackbird's Avatar
 
Join Date: Nov 2016
Location: South Texas
Posts: 222
Re: Seam sealer

I have used this with very good results -

Dynatron Seam Sealer is a fast-skinning, permanently elastic, non-sagging formulation that is brushable and paintable. Provides excellent adhesion to bare metal or painted surfaces and is a non-staining, all-purpose autobody joint and seam sealer
Attached Images
 
__________________
Kel's 1950 GMC 1/2 ton build
68blackbird is offline   Reply With Quote
Old 05-09-2018, 12:13 PM   #10
MARTINSR
Registered User
 
MARTINSR's Avatar
 
Join Date: Dec 2000
Location: Boise, Idaho
Posts: 5,989
Re: Seam sealer

Yes, some do have recommendations for bare metal. I have to say, I mentioned 2k and yes that is the best. But something like this Dyatron on the interior seams is PLENTY good without a doubt. The 2k seam sealer would be the proper one to use on painted seams like the one along the back of the cab or roof, rain gutters, that sort of thing. But inside, and under the floor, that Dyatron is perfectly fine. Though, this is in sunny California if you really wanted to make a protected floor from the underside, a good coating of epoxy primer and then a 2k sealer and then a urethane paint would be my recommendation.

Brian
__________________
1948 Chevy pickup
Chopped, Sectioned, 1953 Corvette 235 powered. Once was even 401 Buick mid engined with the carburetor right between the seats!
Bought with paper route money in 1973 when I was 15.

"Fan of most anything that moves human beings"
MARTINSR is offline   Reply With Quote
Old 05-09-2018, 10:31 PM   #11
Softpatch
Registered User
 
Softpatch's Avatar
 
Join Date: Sep 2013
Location: Vashon WA
Posts: 969
Re: Seam sealer

Quote:
Originally Posted by 68blackbird View Post
I have used this with very good results -

Dynatron Seam Sealer is a fast-skinning, permanently elastic, non-sagging formulation that is brushable and paintable. Provides excellent adhesion to bare metal or painted surfaces and is a non-staining, all-purpose autobody joint and seam sealer
.
I totaly agree and it doesn't matter Clean metal or painted
Apply liberaly Fat and thick (Not for show)
__________________
My Spelling is Not Incorrect...It's 'Creative'
.
.
1966 C-20 .....Swap 91 G-30(5.7 FI)/4L80E
http://67-72chevytrucks.com/vboard/s...d.php?t=789617
59 Viking Revival .. http://67-72chevytrucks.com/vboard/s...d.php?t=632341
Softpatch is offline   Reply With Quote
Old 05-09-2018, 11:32 PM   #12
Matt_50
Registered User
 
Join Date: Jul 2017
Location: Joshua, Texas.
Posts: 1,303
Re: Seam sealer

I think I'm leaning towards this dynatron. Seems a bit more noob friendly. My welds are not the prettiest, and I was worried about my wire wheel missing bits here and there.
__________________
1950 Build
Matt_50 is offline   Reply With Quote
Old 05-14-2018, 10:00 AM   #13
gigamanx
Senior Member
 
Join Date: Sep 2016
Location: Hershey, PA
Posts: 1,004
Re: Seam sealer

Quote:
Originally Posted by 68blackbird View Post
I have used this with very good results -

Dynatron Seam Sealer is a fast-skinning, permanently elastic, non-sagging formulation that is brushable and paintable. Provides excellent adhesion to bare metal or painted surfaces and is a non-staining, all-purpose autobody joint and seam sealer
I used this same tube. Went on great. 24hours or so to dry [strike]cure[/strike] and it was all sealed up. Wear gloves as its a pain in the A to wash off.
__________________
Current Build Thread 1930 Ford Model A Modern Twist: Ford Model A Rat Rod With a Modern Twist

Build Thread Phase 1 "The Swap": 1949 3100 with S10 swap. Beginner build with ambition!

Build Thread Phase 2 "The Drop": Beginner Build with Ambition gets Air Ride

Last edited by gigamanx; 05-15-2018 at 01:07 PM.
gigamanx is offline   Reply With Quote
Old 05-14-2018, 01:35 PM   #14
Matt_50
Registered User
 
Join Date: Jul 2017
Location: Joshua, Texas.
Posts: 1,303
Re: Seam sealer

Alright, I think I'm definitely buying this. I'll wire wheel all my seams just in case, apply the sealer, wait a day or two then prime and paint the floor. Sound right?
__________________
1950 Build
Matt_50 is offline   Reply With Quote
Old 05-14-2018, 02:14 PM   #15
Foot Stomper
Registered User
 
Foot Stomper's Avatar
 
Join Date: Oct 2015
Location: Calgary, Alberta
Posts: 1,252
Re: Seam sealer

Quote:
Originally Posted by MARTINSR View Post
if you really wanted to make a protected floor from the underside, a good coating of epoxy primer and then a 2k sealer and then a urethane paint would be my recommendation.

Brian
What Brian said. You can sub the Dynatron for the 2k sealer if you like.
__________________
So when is this "Old enough to know better" supposed to kick in?

My 1959 GMC build thread http://67-72chevytrucks.com/vboard/s...d.php?t=686989
Foot Stomper is offline   Reply With Quote
Old 05-14-2018, 02:24 PM   #16
MARTINSR
Registered User
 
MARTINSR's Avatar
 
Join Date: Dec 2000
Location: Boise, Idaho
Posts: 5,989
Re: Seam sealer

Quote:
Originally Posted by gigamanx View Post
I used this same tube. Went on great. 24hours or so to cure and it was all sealed up. Wear gloves as its a pain in the A to wash off.
I don't want to be picky correcting this statement but I want it to be clear so everyone understands the differences.

This Dynatron sealer is a "1K" product and doesn't "cure" at all, it simply "dries."

There is a big difference and I just want to sure everyone understands. "Curing" is a chemical transformation like with an epoxy, it literally becomes another material with the bonding of molecules in it between the hardener and the sealer, or clear or primer or whatever becoming a completely different material than either of the two were alone. "Curing" only happens with a 2K. I don't want to say "only" because there are some freaky 1k products out there that "Cure" in a sort, window Urethane sealant for instance, it's a "moisture cure."

But a sealer like this Dynatron is a 1k that "dries" by the solvents leaving it, which is why if you apply it too thick it sometimes won't dry and it will be soft in the middle. It's "drying" like house paint, it's that simple.

1k products are typically soluble after they dry and an be melted with a product like lacquer thinner. Where as a 2k is as said another material once cured and insoluble.


Brian
__________________
1948 Chevy pickup
Chopped, Sectioned, 1953 Corvette 235 powered. Once was even 401 Buick mid engined with the carburetor right between the seats!
Bought with paper route money in 1973 when I was 15.

"Fan of most anything that moves human beings"
MARTINSR is offline   Reply With Quote
Old 05-14-2018, 02:38 PM   #17
Matt_50
Registered User
 
Join Date: Jul 2017
Location: Joshua, Texas.
Posts: 1,303
Re: Seam sealer

You guys are always very helpful and informative. I'm learning a lot through this project. The differences in seam sealers being one. For now I'm concentrating on the inside, and it sounds like this dynatron would be best for me at the moment. When I get to the exterior, it sounds like I need to use a 2k product. I'll be asking plenty of questions once I get to the exterior, I've helped with bodywork, but I've never done the painting myself, that'll all be new to me.
__________________
1950 Build
Matt_50 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 03:35 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com