<PAGE>
Rule 497(d)
Registration No. 333-68601
SUPPLEMENT DATED SEPTEMBER 28, 1999
TO
PROSPECTUS DATED AUGUST 25, 1999
FOR
FUTURITY VARIABLE UNIVERSAL LIFE INSURANCE
A FLEXIBLE PREMIUM COMBINATION FIXED AND VARIABLE UNIVERSAL LIFE INSURANCE
POLICY
ISSUED BY SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)
The sample hypothetical illustrations contained in Appendix C to the prospectus
include several tables that illustrate the way in which a Policy's death
benefit, Account Value and Cash Surrender Value could vary over an extended
period of time based on certain assumptions described in the appendix. The
second column of each table shows the amount which would accumulate if an amount
equal to each premium were invested and earned interest, after taxes, at 5% per
year, compounded annually. For Table 2 and Table 4, the amounts shown in the
second column for Ages 60, 65, 70 and 75 should be disregarded and replaced with
the following:
<TABLE>
<S> <C>
Age 60 32,926
Age 65 74,949
Age 70 128,581
Age 75 197,032
</TABLE>
