Dicor vs ProflexRV for sidewall seams??

Look for Tremco proglaze. It has an aquamarine colored lable and says One ,part, high modulus, high performance silicone sealant.
It is easier to work with than Proflex Rv, remains flexible. Good stuff used by a few RV manufacturers.

OhhWell wrote:

westend wrote:

OhhWell wrote:
Proflex does claim to be silicon free but it acts just like a silicone caulk for better or worse.

Geocel ProflexRV is a Tripolymer sealant. It's formulation contains no silicone. Here's the MSDS.
The only commonality with a silicone caulk is that it comes in a 10 oz tube and seals against water when cured. It's properties are much different, Technical data sheet

Sure but it applied and acted like silicone sealant. Perhaps it sounded like I was casting doubt on the claim that it did not contain silicone. I was not.

Your first post and the use of the words "claim" and "for better or worse" might lead some to believe that the product was similar to silicone caulk. It is not. I've found that the viscosity of uncured Geocel Tripolymer sealants is much greater than silicone and it's application is dissimilar. It also has greater bond strength, more elongation, greater durability in weather, and can be painted.

The Dicor non-sagging Lap Sealant has somewhat similar properties but it is a Silaprene product, probably using EPDM as the polymer and contains quite a bit of Naptha. Dicor is pretty mute about the product's technical specifications but it seems to work well for a lot of users on this Forum.

westend wrote:

OhhWell wrote:
Proflex does claim to be silicon free but it acts just like a silicone caulk for better or worse.

Geocel ProflexRV is a Tripolymer sealant. It's formulation contains no silicone. Here's the MSDS.
The only commonality with a silicone caulk is that it comes in a 10 oz tube and seals against water when cured. It's properties are much different, Technical data sheet

Sure but it applied and acted like silicone sealant. Perhaps it sounded like I was casting doubt on the claim that it did not contain silicone. I was not.

Last year I replaced my range hood vent using Dicor non-sag sealant. It was easy to work with and has held up well. I would use it again.

OhhWell wrote:
Proflex does claim to be silicon free but it acts just like a silicone caulk for better or worse.

Geocel ProflexRV is a Tripolymer sealant. It's formulation contains no silicone. Here's the MSDS.
The only commonality with a silicone caulk is that it comes in a 10 oz tube and seals against water when cured. It's properties are much different, Technical data sheet

Proflex does claim to be silicon free but it acts just like a silicone caulk for better or worse.

When I use proflex, I don't run my finger down the bead like I would with a more traditional caulk - instead I kind of push it into the seam like a putty with my wetted finger. It seems to work pretty well for me.

I just did all of the windows and appliance seams on my new trailer with ProFlex (don't think it was RV, but it was silicon free). It was a bit of a pain to work with but it sticks well. I masked around where I was going to apply it so it would look a lot neater. I'd lay a bead, finger-smooth it, then remove the tape before it cured. As mentioned, it does NOT clean up with water, I used mineral spirits.

From my experience with Proflex I will never use it again. I tried it on some seams in the side. Very hard to lay a bead, impossible to smooth and horrible to try and clean up after. Same seams with Dicor resulted in much better results. I know lots of people swear by the stuff, but I am not one of them.