Seal with confidence using Oatey Great Blue Pipe Joint Compound, your go‑to paste for strong, leak‑proof threaded joints in both metal and plastic plumbing. Its flexible, non‑hardening, non‑separating blue formula glides easily onto threads up to 2″ in diameter, working neatly with PVC, CPVC, ABS, polyethylene, iron, steel, copper, brass or brass fittings. Rated to withstand up to 10,000 psi for liquids (from ‑50°F to 500°F) and 3,000 psi for gases (from ‑50°F to 400°F), it handles harsh conditions without breaking down. Plus, it’s low‑odour, non‑toxic, and cleans up easily — no mess left behind. Certified by NSF, IAPMO, and CSA for water, steam, natural gas (except oxygen), air, caustics, and dilute acids, this compound gives you the quality pros demand.