Fiberglass resin, primer and paint questions - Fiberglass RV
Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-03-2017, 11:03 PM   #1
Senior Member
 
Johnny M's Avatar
 
Name: John
Trailer: '71 Boler, '87 Play-Mor II
Deep South
Posts: 1,213
Fiberglass resin, primer and paint questions

Does anyone here know if the fiberglass resins used in the early 70's Boler's were polyester based or were they epoxy based?

Reason I ask is I am building a custom wet bath in ours and the question arose today as if I should use polyester or epoxy resin. I was told the epoxy would bind better to the wood in the wetbath, but would not work with matte as it could delaminate and to use cloth. Several questions were also raised as to the compatibility of primers with the polyester vs epoxy and if one resin would bind to the other existing resin if using two different ones.

Then there was also the question of epoxy paint vs urethane paint for the final top coat of the wetbath. Urethane is suppose to have the best UV resisting properties as well as colorfastness. I have considered using the epoxy based primer and paint for garage floors sold at the big box stores as epoxy is suppose to bind to just about anything and the garage floor epoxy paint certainly is a lot more cost effective.

Also considered using just a modified alkyd oil based top coat and primer instead of the epoxy or urethane paint/primers.

So many questions and not sure which direction to go with...
Johnny M is offline   Reply With Quote
Old 03-03-2017, 11:28 PM   #2
Member
 
Name: Vince
Trailer: Trillium
British Columbia
Posts: 42
Others here could probably confirm but I'm fairly certain Bolers, Trilliums, and similar trailers used polyester resin, due to cost compared with epoxy. I chose epoxy for my trailer repairs. Lots of good info here on using it:

Epoxy by the Leading Epoxy Manufacturer | WEST SYSTEM Epoxy

I agree about using fiberglass cloth, not mat, with epoxy. The mat has a binder that won't dissolve in epoxy resin.

For paint, marine topcoats seem to be a popular choice. Many here have used Interlux Brightside or Rustoleum Topside. I used the Rustoleum and am very happy with the results.
VB_in_BC is offline   Reply With Quote
Old 03-04-2017, 06:32 AM   #3
Senior Member
 
Johnny M's Avatar
 
Name: John
Trailer: '71 Boler, '87 Play-Mor II
Deep South
Posts: 1,213
Quote:
Originally Posted by VB_in_BC View Post
Others here could probably confirm but I'm fairly certain Bolers, Trilliums, and similar trailers used polyester resin, due to cost compared with epoxy. I chose epoxy for my trailer repairs. Lots of good info here on using it:

Epoxy by the Leading Epoxy Manufacturer | WEST SYSTEM Epoxy

I agree about using fiberglass cloth, not mat, with epoxy. The mat has a binder that won't dissolve in epoxy resin.

For paint, marine topcoats seem to be a popular choice. Many here have used Interlux Brightside or Rustoleum Topside. I used the Rustoleum and am very happy with the results.
Thanks I will check that link out. Being this is for the wetbath my main concern with resin, primer and top coat is water penetration and delamination
Johnny M is offline   Reply With Quote
Old 03-04-2017, 09:13 AM   #4
Senior Member
 
D White's Avatar
 
Name: Dave
Trailer: Trails West Campster, CampStar, Uhaul, Fiberstream
Washington
Posts: 184
Quote:
Originally Posted by Johnny M View Post
Does anyone here know if the fiberglass resins used in the early 70's Boler's were polyester based or were they epoxy based?

Reason I ask is I am building a custom wet bath in ours and the question arose today as if I should use polyester or epoxy resin. I was told the epoxy would bind better to the wood in the wetbath, but would not work with matte as it could delaminate and to use cloth. Several questions were also raised as to the compatibility of primers with the polyester vs epoxy and if one resin would bind to the other existing resin if using two different ones.

Then there was also the question of epoxy paint vs urethane paint for the final top coat of the wetbath. Urethane is suppose to have the best UV resisting properties as well as colorfastness. I have considered using the epoxy based primer and paint for garage floors sold at the big box stores as epoxy is suppose to bind to just about anything and the garage floor epoxy paint certainly is a lot more cost effective.

Also considered using just a modified alkyd oil based top coat and primer instead of the epoxy or urethane paint/primers.

So many questions and not sure which direction to go with...

Epoxy was never used on Bolers or any other trailer in the 70's and it isn't used on any that I know of now. Epoxy is for boats. You don't need or want it anywhere on your trailer. You don't get delamination or water penetration on your trailer exterior do you??? Water penetration is also only a problem for boats. I would build it out of Polyester mat, not cloth and then prime and paint with which finish system you choose. I would personally use bondo, polyester high build primer, epoxy sealer and then epoxy tub paint...all properly prepared before application of each step and using all safety precautions. Good luck on how ever you choose to do it...you can do it!!!
Fiberglass Dave
D White is offline   Reply With Quote
Old 03-04-2017, 09:38 AM   #5
Senior Member
 
Johnny M's Avatar
 
Name: John
Trailer: '71 Boler, '87 Play-Mor II
Deep South
Posts: 1,213
Thanks Fiberglass Dave! You are just the person who I was hoping would respond to this thread, glad to see you are still on this forum . Your expert advice here is highly valued by myself and many others.

That is what I am gonna do then. I will post pics of the process maybe it will be useful to others also.
Johnny M is offline   Reply With Quote
Old 03-05-2017, 06:01 AM   #6
Senior Member
 
Name: J Ronald
Trailer: Currently shopping
North Carolina
Posts: 236
Polisher and epoxy

Boats are made of polester resin, epoxy too expensive. New polester will not adhere to cured poly. epoxy will adhere to cured poly. and most anything else. Read the West System info. that was mentioned earlier. We have lived aboard a fiberglass boat for years. FRP, fiberglass reinforced plastic systems are the same where ever they are used. Polisher and epoxy are plastics and very weak unless reinforcement is added such as fiberglss. Interlux Brightside is my paint of choice unless you are a pro painter. Ron
J Ron is offline   Reply With Quote
Old 03-05-2017, 09:03 AM   #7
Senior Member
 
D White's Avatar
 
Name: Dave
Trailer: Trails West Campster, CampStar, Uhaul, Fiberstream
Washington
Posts: 184
Quote:
Originally Posted by J Ron View Post
Boats are made of polester resin, epoxy too expensive. New polester will not adhere to cured poly. epoxy will adhere to cured poly. and most anything else. Read the West System info. that was mentioned earlier. We have lived aboard a fiberglass boat for years. FRP, fiberglass reinforced plastic systems are the same where ever they are used. Polisher and epoxy are plastics and very weak unless reinforcement is added such as fiberglss. Interlux Brightside is my paint of choice unless you are a pro painter. Ron

This notion that polyester does not stick to polyester and that you must use epoxy is a total lie that has been perpetuated by the West people and other epoxy repair boat people. ARGUING THIS FACT is why I don't post here anymore. We have been fixing fiberglass with fiberglass for 40 years...SO PEOPLE YOU CAN MAKE A LIFELONG REPAIR TO YOUR TRAILER WITH READILY AVAILABLE FIBERGLASS MATERIALS. YOU CAN'T NECESSARILY MAKE A LIFELONG REPAIR TO YOUR FIBERGLASS BOAT THE SAME WAY. Please try it with fiberglass and not let statements like above scare you away from trying it. If it doesn't work the way you wanted, grind it away and try it until it does. IT WILL STICK. You can do it....Fiberglass Dave
D White is offline   Reply With Quote
Old 03-05-2017, 09:14 AM   #8
Senior Member
 
Name: Michael
Trailer: Li'l Hauley
Oklahoma
Posts: 5,892
I wouldn't worry much about UV resistance for the interior. I mean, it wouldn't be at the top of my priority list.
Mike Magee is offline   Reply With Quote
Reply

Tags
paint


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can fiberglass resin go bad? Uncle Cereal Problem Solving | Owners Helping Owners 6 03-08-2016 08:29 PM
Fiberglass Resin Recommendations? Seth and Desiree Modifications, Alterations and Updates 46 01-26-2015 08:01 PM
Fiberglass/resin prices? frank_a General Chat 2 07-29-2013 11:04 AM
Curing Fiberglass resin Per Walthinsen Problem Solving | Owners Helping Owners 9 02-22-2006 12:07 AM

» Upcoming Events
No events scheduled in
the next 465 days.
» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 01:48 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.