LubeTube is a multi-purpose lubricant-sealant suitable for O-rings on swimming pool/spa equipment & plumbing. LubeTube lubricates and seals with a barrier of PTFE. It is safe on metals, plastics and painted surfaces. It is waterproof, odorless, non-toxic, non-staining, non-flammable, non-corrosive, non-rusting, and biodegradable. It’s environmentally safe with a USDA H-1 listing. It will not melt, dry out, form gummy deposits, separate, crack, evaporate, run or drip. Viscosity remains the same in hot or cold temperatures with a range of -65º to 500ºF.