As gelcoat surfaces wear, the chemicals wash out which creates microscopic pores. As a result, the surface looks white or faded. Gelcoat Rejuvenator penetrates, fills & seals these pores restoring surface color & fighting future damage. Unlike other products, PRESTO! GCR is so durable it lasts for years - not weeks. PRESTO! GCR will not wash away like wax, silicone or oil-based products. Because PRESTO! GCR penetrates surfaces so effectively, as little as one coat can restore the showroom-like appearance of your vehicle.