Will Superior-Lock prevent bunching?

In theory, it depends on how thick your carpet is. With thinner, berber style carpets, Superior Lock works extremely well and helps prevent rugs from bunching or wrinkling. With thicker rugs on top of thicker carpets, such as shag, it makes it more difficult to keep the rug anchored and prevent bunching & creeping. We have tested several similar products and found there isn’t really anything on the market that works with heavy carpeting.