Flexispan differs from other crack fillers or sealents in two major ways. First, Flexispan eliminates the use of messy expoxy injections and instead seals the crack with a flexible sealent that will stop water seeping through the crack. The other key factor in our Flexispan system is that it doesn't end with sealent. Our system uses an additional step to make sure that no seepage will make it pass the sealent. A second layer of beveled foam is used, which would drain any small amount of additional seepage down into your drainage system or into a small drywell created under the basementfloor.