WinterProof™ All Purpose Water System Antifreeze with BurstGuard™ Guarantee -50°C provides you with peace of mind against harsh Canadian winters. Our ready to use formula helps protect your most valuable properties' plumbing from cracking, bursting and other freeze damage. Safe to use for metal and plastic pipes. Formulated for recreational vehicles (RV), cottages, swimming pools, boats (waterlines only), and more.