Grip StripUse behind chinking and caulking in joints larger than 1 4 in. wide including between logs, around door and window trim, at foundation sill plates, in wall joints cracks, and anywhere else you use caulk chinking Trapezoid Shape Water Resistant repels water to protect the joint from damage Saves Money Fills joints so you use less caulk Fully compatible with all substrates and Sascho chinking and caulking products