Primal® (Rhoplex) WS 24 is a conservation grade alternative to PVA which is less susceptible to cracking, yellowing and becoming brittle over time. Primal (Rhoplex) WS 24 is used particularly for preservation of mammoth tusks/teeth and ice age vertebrate remains that require consolidation. It is also used as a consolidant in the excavation and recovery of fossils in damp, wet or waterlogged environments.