Three Problems With Using Expired Canned Insulation

Posted on: 12 December 2019

Canned spray insulation is a valuable tool to have around the house. It's useful for a number of jobs, including adding insulation around window frames, exterior elements such as hose fittings, and more. Whether you're buying a new can of insulation for a job around your house or you're digging through your shelves to find a can that you bought some time ago, it's critical to check the best before date on the bottom of the can. Just as you don't want to eat food that is expired, you don't want to tackle any job with insulation that has passed its best before date. Here's why.

Lots Of It Won't Come Out

An insulation can that has passed its best before date will often lose some of its internal pressure. This can mean that as you're pressing down on the trigger button, you may not be able to get all of the insulation out. It can be frustrating to have a job to finish — and to be pretty sure that you've got enough insulation in the can — only to realize that the can doesn't have enough pressure to expel all of the insulation. When you buy a newer product, you can be confident that you'll be able to use the contents until the can is empty.

Poor Insulation Consistency

Another concern with attempting to use an expired can of spray insulation is that it might have a poor consistency. For example, some of the insulation that comes out of the nozzle will be runny and thus not effective in your intended task. You might also notice chunks in the insulation, rather than the smooth consistency that you're looking for. A can of insulation that hasn't reached its best before date, meanwhile, will have a smooth consistency that makes it very easy to work with.

Issues With Messiness

Working with spray insulation from a can doesn't have to be a messy job, but when you're working with a product that is too old, that's exactly what can happen. For example, the can can sputter and send a bit of insulation out in a rapid manner, causing it to splatter outside of your target area. Then, you might struggle to get any insulation out until you shake the can vigorously — only to have more insulation splatter out when you press the button. A can that hasn't expired will be much cleaner to use for any job.

To learn more about spray foam insulation, consult a resource in your area.