Help with Cuben Fider

[Stir Fry]

I have a Cuben Fiber tarp that I used a feld seam on the ridge. I sealed it with silicon but it still leaks a little. I bought some 3m VHB tape and plan to use a 3 " piece of Cuben over the seam. Question is what can I use the prep the Cuben before puting the tape on so the adheasion is good.

[sodakgrrl]

I used 3M '94 Primer' when I put my tarp together. Use it outside if you can!