Preventative maintenance is important to keep your RV in the best condition possible. Many such tasks are not as difficult as they are tedious and time consuming. But the alternative is an expensive trip to the shop to get it done—or worse yet, an even more expensive trip if you don’t do them! Case in point: re-sealing the exterior seams on your RV.
Why Dicor Instead of Caulk?
On our previous rig, I had once used silicone caulk to seal an exposed area of trim that was allowing moisture into the wooden wall. I regretted that later when I had to remove it and do the job right.
Yes, silicone caulk is waterproof. But it will eventually dry hard and crack over time. And it is a serious bitch to clean off!
Dicor Lap Sealant will never harden. It remains flexible and water-tight as it ages. It can, however get ugly and dirty, and after many years it may have a tendency to shrink and separate. That’s why it’s important to frequently inspect all exterior seams—around all trim and any vents or light fixtures.
Depending on the RV manufacturer, Dicor is often applied rather sloppily. Once you are fed up with the droopy looking brown goop, take the time to remove it and replace it with the right stuff.
Caulking tools or some sort of dull plastic blade is great for removing the bulk of any old Dicor. Use a rag or sponge and some alcohol to get rid of remaining residue.
Make sure you have plenty of Dicor on hand before you get started. I used four tubes to reseal our rig, and always like to have some on hand for any emergency repairs.
Be sure to use the right type of lap sealant too! Dicor is the most popular brand name. It is available in a few different shades, but there are two kinds you want to pay attention to when ordering Dicor.
Self Leveling Dicor is more fluid, it is best used on the roof or flat surfaces where even spreading of the sealant is desired.
Non-Leveling Dicor is best for trim on vertical surfaces since it will not sag as much. Like so…
See what I mean by sloppy application?
TIP: Use a steady hand with a 3/8″± bead of sealant and apply long smooth strips at a time. Do not try to smooth out the sealant with your finger, as you might when applying caulk. Before it dries, Dicor is very sticky!
Resealing the trim on your RV is a time consuming job, but the reward is a clean looking rig without the potential for water damage.