Which type of NON-silicone for caulking after installing window?

Never use anything with the word "silicone" on your RV. Ever.

First of I will say that our first rig had clear silicone on the top and a few inches down on all the window frames and the entry door, but, our current rig had no sign of silicone except, on the window that had been removed for repair and reinstalled with some black goop and not the butyl tape. None of the openings leaked before they were R&R by well recommended guys.

Winnebago calls out a specific butyl tape and ours shows no sign of squeezing out like the Bounder did. I am certainly not an expert on sealing windows and doors in RVs but the first window that was repaired and the two that I had repaired now have a caulk and it oozes out and makes a mess. I am going to remove them and use the tape called out by Winnebago to seal them. I can only assume that all Winnebago's are assembled this way, am I wrong?

I had an old time RV body guy put me on to DAP 40 year ALEX PLUS, clear. I've been using it for 22 years with out a failure. Price is right, easy to find, stays flexable, don't crack and sticks. NOT FOR EPDM!

Richard

As you can tell, we don't use the "s" word around here much :B

The putty turns black and ugly around the exposed edges. So does the usual silicone get ugly after a while, and it can't be cleaned back to white with anything.

I agree with waiting till the putty settles, then scrape it back and use that stuff mentioned above that supposedly (many claims for that--not always correct "depending") it does not turn black after a while.

We get a lot of mould here over the wet winter, but other places it might not be so bad. Bleach is the usual cure, but it has no effect on silicone where the mould is underneath it.

Good advice above...from wrgrs50s and Nutinelse2do .
I sure would not use silicone..

Proflex RV clear is what we used on a replacement window.

Sika Flex 505 with UV protectant works very well. Available at camping world or online. It's a high quality sealant and don't mildew like cheaper caulk.

Tip: Use windex or soapy water, dip finger and smooth the bead. It's a very tacky caulk and takes a little finess at first but is extremely durable.

I would give the tape a couple of days to squeeze out fully before caulking.

If the design allows a white caulk, you might consider Geocel Proflex (RV), which is well respected, and preferred by many over silicone. If you want a clear silicone, then I've always had good success with GE Silicon II Window and Door.