Are there any products for increasing the waterproofness of packs or shelters?
Yes and no, depending on the fabric from which the pack or shelter is made. Packs. Water can enter packs in three ways: through the seams, the fabric, and the openings. To seal the seams of your pack, please refer to the FAQ on that subject. All of the fabrics GoLite uses in its packs (Dyneema, Velocity, and SilLite) are initially waterproof, though they start to become less so with use and UV exposure. The waterproofness of polyurethane-coated fabrics (like Dyneema and Velocity) can be partially restored by using a treatment like Nikwax Tent and Gear Proof. For the treatment to work effectively the product must first be clean, so please check out the Product Care instructions first. Unfortunately, the waterproofness of SilLite cannot be restored once the silicone-impregnation begins to break down. Shelters. GoLite shelters are made with SilLite, except the floors, which are made with PU-coated nylon. The waterproofness of SilLite cannot be restored once the silicone-impregnation begin