If you want to seam seal your Silnylon / Silpoly tarp, or any other silicone-treated fabrics, you've found the right product! Gear Aid's Seam Grip Sil is a tarp/tent seam sealing that is easy to use and works with just one application. Use the included brush and follow the instructions on the package to prevent your silicone-treated tarp / tent from leaking! This silicone seam sealer also works great for minor to moderate repairs of silicone-treated products, so it may come in handy out in the field. Keep the rain outside your tarp / tent, where it belongs.