As soon as you're sure that the latex outside is going to STAY outside, you rush to your kitchen to try and deal with the latex inside. Lifting your leg and placing it on the table, you rip your pantleg open to get a look at it. All up and down its length, you can see the stuff wriggling and gyrating, shifting about as it morphs and twists, no doubt seeking a shape to take and maybe even trying to spread further. It doesn't seem to be moving any further than the top of your leg, but as you look at your ankle you can see it trying to force its way down into your socks and to your foot. You'll have to work fast.
Given what happened last time it would probably be best if you were careful dealing with the substance, but given your current situation you know that's not really a option. Running to the kitchen counter, you grab a steak knife out of a drawer and then return to the table, placing your leg back on its surface. You take off your shirt, wrapping it around the hand holding the knife to protect it from any attempts by the latex, then throw caution to the wind and try to slice an opening into it so that you can tear it off. You watch in surprise as the blade swiftly cuts through it, and are amazed when it soon has an open cut running down its length. Then, without warning, the stuff twists around your leg and rushes to your chest (which you'd left exposed when you took off your shirt), coating it instead. Using your free hand, you grasp at it and try to tear it off, pulling with all your might. As you do, it quickly shifts position again, leaving your chest to crawl up your hand and across your arm, stopping at your shoulder. The entire arm begins to twitch as you feel strange sensations shooting through it, the latex working far more quickly to take a definite shape this time. You don't waste a second ripping the shirt from your other hand with your teeth, and manage to just as the coated arm forms a cat-like pawish hand at its end, the rest of the arm visibly bloated from the excess latex. Completely out of control, the paw - your paw - lunges to grab your face, and you barely manage to react in time, grasping it at the wrist. You manage to hold it back, but then the paw twists around and stops trying to grab your face, instead clutching your unchanged wrist. You watch in horror as the excess latex on the indigo arm rushes down it, pouring onto your unchanged arm and rushing up to its shoulder. The sensations come to it far more quickly, and then the twitching, and then finally motionlessness as it takes on the same cat-like configuration as the first.
Both the arms look fairly slender now, and it doesn't look like there's enough latex on either of them to coat any other part of you now. You try flexing your hands- er, your paws, and find that both are back within your control. Looks like you've learned a few important things about this stuff: specifically, that it doesn't seem interested in moving from place to place unless you try to remove it and that it's finite - it can't coat your entire body with just a small amount of itself. Unfortunately, that doesn't seem like the sort of thing that's going to come in handy when dealing with the mass that's still waiting for you outside.