Medium viscosity, toughened, undiluted, epoxy resin with excellent physical properties, an internal mold release and proprietary air release system making it an ideal resin for pultrusion applications. Fast wetting of reinforcement materials. Use 1391-R1-PV where resistance to cracking and increased impact resistance is desirable. 1391-R1-PV contains 100% solids, highly resistant to crystallization in cold environments. No VOCs and DOT non-regulated.