NorthernLimits
Michigan
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Joined: 11/17/2011
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I can't find anything that sticks good to fiberglass sides of my rig.
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SH
Lynden, WA
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Joined: 09/27/2006
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NorthernLimits wrote:I can't find anything that sticks good to fiberglass sides of my rig.
I'm pretty sure THIS
will, provided it is not going over areas that have had silicone sealants prior!Like the data sheet says..."Once cured, the product exhibits tenacious adhesion and has the ability to be subjected to stress and vibration as well as expansion and contraction within a joint."
2011 Heartland Big Country 3450TS 
2007.5 Chev LMM Duramax/Allison
2010 FLHTC Electra Glide Classic Red Hot Sunglo
Heartland Owners Club - Washington Chapter Leaders
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mapguy
Puget Sound
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Joined: 09/02/2007
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NorthernLimits wrote:I can't find anything that sticks good to fiberglass sides of my rig.
3M 4000UV Sealant. A marine product with UV stabilizers.
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bingford
Utah
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Joined: 09/25/2011
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Regarding ability of sealants to stick to RV fiberglass:
Wax and road grime have a negative effect on bonding to fiberglass and gelcoat.
Any of the polyurethanes will achieve very high bond strength to a clean surface (exceptions are some plastics life polyolefin). Use a wax-cutting cleaner before sealing.
The solvent-based sealants may bond to a dirty surface. The solvents "cut throught" the wax and grime to reach the fiberglass surface. In the the end, the contamination will effect strength and longevity.
Silicone is sensative to dirty surfaces and provides only moderate strength on clean surfaces.
* This post was
edited 02/07/12 04:22pm by bingford *
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ExRocketScientist
Laurel, MD
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Joined: 11/11/2010
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bingford wrote:Regarding ability of sealants to stick to RV fiberglass:
Wax and road grime have a negatove affect on bonding to fiberglass and gelcoat.
Any of the polyurethanes will achieve very high bond strength to a clean surface (exceptions are some plastics life polyolefin). Use a wax-cutting cleaner before sealing.
The solvent-based sealants may bond to a dirty surface. The solvents "cut throught" the wax and grime to reach the fiberglass surface. In the the end, the conatmination will affect strength and longevity.
Silicone is sentaive to dirty surfaces and provides only moderate strength on clean surfaces.
Good points. Funny thing is when we apply Eternabond tape we clean everything real good, but when we apply caulk, we have a tendency to just go put it on.
ERS
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mapguy
Puget Sound
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ExRocketScientist wrote:bingford wrote:Regarding ability of sealants to stick to RV fiberglass:
Wax and road grime have a negatove affect on bonding to fiberglass and gelcoat.
Any of the polyurethanes will achieve very high bond strength to a clean surface (exceptions are some plastics life polyolefin). Use a wax-cutting cleaner before sealing.
The solvent-based sealants may bond to a dirty surface. The solvents "cut throught" the wax and grime to reach the fiberglass surface. In the the end, the conatmination will affect strength and longevity.
Silicone is sentaive to dirty surfaces and provides only moderate strength on clean surfaces.
Good points. Funny thing is when we apply Eternabond tape we clean everything real good, but when we apply caulk, we have a tendency to just go put it on.
Preparation is the key. If it is not squeaky clean why bother.....it will still leak after you are done.
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