Seam Sure Is A Fast Drying, Water Based Urethane Formula Designed For Sewn Seams On Synthetic Fabrics And Breathable Laminates. It Has A Unique Brush Tip Applicator To Work Into Needle Holes, Sewn Joints, Corners And Under Lap-felled Seams. Freeze/thaw Stable And Washable/dry-cleanable. It Is Ideal For Tents, Packs, Rainwear, Garments And Tarps.