Get primed and ready for action. This long lasting, waterproof liner from Urban Decay glides on smoothly to prime and defineÃ¢â‚¬â€for long lasting lip colour and clean lines. Smooch. Pout. Smack. Nibble. Lick. 24/7 stays put through everything (yes, everything) you do. When you use this liner to fill in your lips completely, it primes them for lipstick or gloss, grabbing on to colour to help it last.