DICOR vs SIKAFLEX vs PROFLEX? | What RV Sealants should I use? 

Thanks for watching! We have more content like this coming down the pipe soon!

We'll be covering this in more depth in a future video! There was an amazing brush/roll on product in a cab from Proflex as well but it was recently discontinued. We're planning a test of all the main products out there to demonstrate the reliability of each of them, stay tuned!

I am revealing my windows. What is your thoughts??

Happy to help! Stay tuned for more videos like this!

Eternabond is an amazing product! Sticks to pretty much anything and in our testing is the longest lasting! Good choice.

Happy to help! For the roof trim on fiberglass/metal units, our go to combo is Alpha putty tape and Sikaflex 221 sealant to run a bead around.

Thanks for watching! All polyurethane sealants are a bit of a pain to remove, but we find that Sikaflex is generally easier to get off after a length of time than Proflex and a lot of other polyurethane based sealants!

Thank you! For EPDM or TPO we recommend the Dicor part 1 and part 2 system

With that style of roof/coating, you can use the Sikaflex and Proflex products. There is also a brush-able product made Hengs but we've had much better success in our shop using the Proflex and Sikaflex in the tubes. Let us know if you have any other questions!

Thanks for watching! For this I would lean towards either Sikaflex 221 or Proflex. Great adhesion and longevity, and it isn’t self leveling so it won’t drip down the side.

Sikaflex 715 is very new to the industry and our techs don't have a great deal of experience with it quite yet, but it is specifically designed and safe to use on EPDM and TPO roofs. For aluminum roofs, I’d recommend the 221.

Behind the rain gutter you should use putty tape (I'll be covering this in a video very soon) and then to seal the edges of the gutter I'd use Sikaflex or Proflex!

Our techs use spray foam to close off any larger sections and Sikaflex 221 or Proflex for smaller areas!

We find the 227 has very similar flexibility to the 221, but a much faster curing time!

@@edmontonrv Struggling to find a warm enough dry two days right now, that's valuable information! Thanks!

Typically we use Sikaflex 221 for this task! We find it bonds the best to the materials that the slide wiper and D seals are made from. Silicone works temporarily, but doesn't bond as well and gets brittle/falls off sooner.

@@edmontonrv thanks I’ll try tat next time. I used some proflex and it wanted to pill up while trying too tool, we used mineral spirits like they suggested, but still didn’t want to tool very smooth

You can go over old sealant so long as it’s not completely deteriorated and falling off. Make sure to completely encapsulate the old sealant, avoid doing small dabs or partial touch ups.

@edmontonrv can you also do the same with pro flex?

Absolutely! The same applies for Dicor, Sikaflex, Proflex, Alpha, and other RV polyurethane sealants.

The cap sealant is used for any sealant application that doesn’t touch a rubber roof - doors, windows, hatches, etc.

That product is very new to the industry and our techs don't have a great deal of experience with it quite yet, but it is specifically designed and safe to use on EPDM and TPO roofs. Avoid using any other products not specifically for a rubber roof though (such as Sikaflex 221), as they can cause issues!

@@edmontonrv I have a small experiment going on right with this product. I’ve replaced some aging self leveling sealant around my ladder to roof attachment with the 715. I like it’s initial workability and texture when cured. It appears to be holding well to the roofing material. so far the only downside I’ve noticed is I had vultures on my roof early in the morning one day and they picked at the new sealant and left the old alone!

We've found the best product for that is Sikaflex 221. It adheres better and for longer than other products, and it's also a lot easier to smooth out after applying and make look nice!

​@@edmontonrvsikaflex doesn't come in clear or cream color like the one on my rv.

3M does make some really good goop! The only thing to keep in mind when using these products, especially the 5200, is that most are designed to be a permanent seal. So if a tree falls on your roof vent/skylight and you have to replace it, you won’t be getting that vent flange off without seriously damaging the roofing all around it. But otherwise it is definitely a solid product being that it’s designed for marine applications and has been around for a long time!

@@edmontonrv Hahah!! Well youre 100% right about that, I only glued down a skylight with it once and a few years later a tree broke it and I had to use a fairly aggressive flapper wheel to clean it up lol As a result I have been using it since for permanently sealing front and rear caps as well as the perimeters of skylights and penetrations, basically any fiberglass, glass, plexiglass, or aluminum. Its insane how long it lasts...14 years on my motorhome and going on 8 years on my Travel Trailer. I scraped and cleaned up the factory cap sealer on the TT then resealed and reglued with 5200 and its like new to this day. On the motorhome I went over the factory sealer because it seemed to be a very stout material. and was only a year old. I usually use Solar Seal to glue anything down these days, its the best product Ive found to work on the Sunrooms I build as well. Cheers!!