Bethany, if your IR drytop has a latex neck or wrist gasket then check out his thread on how to replace them:
[
www.americanwhitewater.org]
If the drytop has the soft, neoprene neck gasket I'm not aware of any non-IR replacement methods. However if so, then don't worry as IR has ALWAYS been a great company when it comes to the quick (and cheap or free) repair of their gear.
barryg