The product would be one of Tegaderm, Duoderm, Second Skin, and others. These dressings allow the wound to stay moist while allowing the wound to breathe through semipermeable plastic layers. It's expensive stuff, but these bandages are resistant to showers and can stay on the wound for up to a week.
To treat road rash:
- Clean the wound thoroughly by flushing it with clean water and mild soap or saline solution. Scrubbing the wound can increase the trauma.
- Do not apply antiseptics such as hydrogen peroxide or iodine washes -- these can harm the exposed tissue. Even topical antibiotic creams can interfere with wound healing, so medical professionals now advise against this for road rash.
- Apply a "moist" dressing like the hydrogel and hydrocolloidal dressings I mention above.
In over 20 years of serious cycling, I've had more than a few episodes of road rash. The new magic dressings are an absolute Godsend -- no scabbing, no nasty pus-filled infected sores, and it even seems to keep the scarring down. These specialty bandages can be hard to find even in drugstores -- I order it online and keep it in my First Aid Kit at home.