Poorly maintained rubber slide-out seals or gaskets can cause deterioration and cracking that allows water, dirt, wind, and even rodents to enter RVs. Contains UV inhibitors which help prevent cracking and fading. Long lasting water resistant formula reduces friction and wear. Extends the life of rubber slid-out and other seals when used regularly. Also works to protect other RV rubber seals including those on windows, doors, compartments and hatches. Great for conditioning rubber seals on RVs, boats, cars, and other vehicles. Safe to use on rubber, metal, vinyl and plastic.