Against the background of rising raw material costs, and with immediate effect, Henkel is implementing a price increase for certain product groups of its industrial adhesives. Increase amounts will vary based on market segment and technology. On average, the price increases will range from 10 to 25 percent. The price increase is attributable to ongoing escalation of raw material costs over the last 15 months, especially affecting oil and natural gas based products, the company said. Continuous spikes in global demand, coupled with capacity constraints in primary chemical, rosin and resin feed stocks, have further tightened supply, have driven raw material prices upward. For this reason, Henkel said further price increases will become necessary in the following categories: hotmelts, polyurethane, water-based adhesives and surface treatment products.