The sealing rings are synthetic resin with chamfered ends. Check the condition of the sealing rings, and replace them only if they are worn, distorted, or damaged.
For a better fit, squeeze sealing rings together slightly before installing them.

Apply ATF to the new sealing rings, then install them on the secondary shaft.

After installing the sealing rings, verify the following:
The rings are fully seated in the groove.
The rings are not twisted.
The chamfered ends of the rings are properly joined.
Transmission End Crankshaft Oil Seal Installation - In Car
Special Tools Required
Driver Handle, 15 x 135L 07749-0010000
Oil Seal Driver Attachment, 96 mm 07ZAD-PNAA100
Remove the transmission.
M/T model
A/T model ...
Reporting Safety Defects (U.S. Vehicles)
If you believe that your vehicle has a defect which could cause a crash or could
cause injury or death, you should immediately inform the National Highway Traffic
Safety Administration (NHTSA) in ...
Floor Mats
If you remove a floor mat, make sure to re-anchor it when you put it back in
your vehicle.
A non-Honda floor mat may not fit your vehicle properly. This could prevent the
proper operation of th ...