Sikaflex-521UV

In several posts you've asked where to find this product recommended by Heartland for Sealing "non-roof" joints, seams and along the channel at the bottom of slides.

First, here's the technical stuff:

http://www.tbpconverting.com/products/productsPDFs/sika%20521.pdf

Here are some sources:

http://www.jamestowndistributors.com/userportal/show_product.do?pid=3517

http://tweetys.com/sikaflex-521uv-sealant.aspx

http://compare.ebay.com/like/250783...e26d28a&itemid=250783272899&ff4=263602_309572

http://www.jmsonline.net/sikaflex-521-uv-white-145-oz.htm

This product, in my experience drys "hard" but remains flexible. By "hard" I mean it doesn't come off on your hand or other objects it passes across but flexible if the joint moves...as we all know ALL joints on our rigs move.

I do not believe this is a roof product, however, for thru-roof fittings.

Thank you for the list!

Now, one more question. Heartland told me they use Sikaflex 505UV. Does anyone know the difference between 505UV and 521UV? I do know the 505UV is available in both gray and white. Not sure about the 521UV.

Just found this at one of your web sites:

Sikaflex-505UV is suitable for use on a wide variety of substrates; including aluminum, steel, glass, marble, wood and many different types of plastic.


Sikaflex-505UV is a one-component silane terminated polymer (STP) with <NOBR>excellent</NOBR> UV and weathering resistance, and excellent adhesion to a wide variety of substrates. It has a nine month shelf life when stored unopened at or below 77 degreesF. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.
Note: Replaces Sikaflex 521UV.