Forum Discussion

Casinojunkie's avatar
Casinojunkie
Explorer
Jan 01, 2014

Sealing fiberglass exterior

What product do I use to seal the seams on the fiberglass exterior of my camper?
Also what product should I use to clean the exterior surface?
Thank you, Dallas
Seeking Advice
  • Veebyes's avatar
    Veebyes
    Explorer II
    Jan 02, 2014
    For cleaning before laying down a fresh bead of silicone rubber, use either acetone or laqour thinners.

    The 3M 4200 is a bonding product & is almost as nasty as 5200. Once on it is near impossible to remove. Way overkill if the object is waterproofing not bonding.
  • Casinojunkie's avatar
    Casinojunkie
    Explorer
    Jan 02, 2014
    RVUSA wrote:
    Casinojunkie wrote:
    prichardson wrote:
    Depends on the seams. If they are fiberglass to fiberglass, metal, or other hard materials I would use 3M 4200. If it is the fiberglass to rubber roof seam you need to use sealant compatable with the roof material. For maintaining the exterior use the same thing to wash that you use on your vehicle. I prefer Starbrite marine products for waxing and polishing.

    Thanks for the input but
    not looking for a maintaince product but one to clean surface before applying caulk, or eternabond.


    Most dealer shops use acrysol. You can get it thru them. I carry a can with me all the time. You know, in case I tear the roof on a limb and have to fix it in the boonies.,
    Thanks

  • RVUSA's avatar
    RVUSA
    Explorer
    Jan 02, 2014
    Casinojunkie wrote:
    prichardson wrote:
    Depends on the seams. If they are fiberglass to fiberglass, metal, or other hard materials I would use 3M 4200. If it is the fiberglass to rubber roof seam you need to use sealant compatable with the roof material. For maintaining the exterior use the same thing to wash that you use on your vehicle. I prefer Starbrite marine products for waxing and polishing.

    Thanks for the input but
    not looking for a maintaince product but one to clean surface before applying caulk, or eternabond.


    Most dealer shops use acrysol. You can get it thru them. I carry a can with me all the time. You know, in case I tear the roof on a limb and have to fix it in the boonies.,

  • Casinojunkie's avatar
    Casinojunkie
    Explorer
    Jan 01, 2014
    prichardson wrote:
    Depends on the seams. If they are fiberglass to fiberglass, metal, or other hard materials I would use 3M 4200. If it is the fiberglass to rubber roof seam you need to use sealant compatable with the roof material. For maintaining the exterior use the same thing to wash that you use on your vehicle. I prefer Starbrite marine products for waxing and polishing.

    Thanks for the input but
    not looking for a maintaince product but one to clean surface before applying caulk, or eternabond.
  • tatest's avatar
    tatest
    Explorer II
    Jan 01, 2014
    You can use the sealant or caulk selected by the manufacturer, which is often different seams. The manufacturer's service manuals should have product specifications and part numbers. Many RV dealers carry these products in 3M and Dicor brands, manufacturers often use products not branded for retail. Any servicing RV dealer can help you select for each seam application.

    Alternatively, a number of RV owners advocate taping over seams with Eternabond products, which are also different for different applications.
  • prichardson's avatar
    prichardson
    Explorer
    Jan 01, 2014
    Depends on the seams. If they are fiberglass to fiberglass, metal, or other hard materials I would use 3M 4200. If it is the fiberglass to rubber roof seam you need to use sealant compatable with the roof material. For maintaining the exterior use the same thing to wash that you use on your vehicle. I prefer Starbrite marine products for waxing and polishing.

About RV Tips & Tricks

Looking for advice before your next adventure? Look no further.25,115 PostsLatest Activity: Feb 27, 2025