Flexible Polyurethane Casting Resin — Cast Elastomer System

Cast urethane elastomers are poured at low pressure into simple moulds, so a bushing, roller cover or wear pad can be produced without a steel tool. They typically outperform conventional rubbers on abrasion and load capacity for the same hardness, which is why maintenance shops cast replacement parts rather than waiting on moulded ones.

Hardness is the primary specification and drives everything else: soft grades absorb shock and conform, hard grades carry load and resist deformation. Selecting from the duty — load, deflection, impact, abrasion, and whether the part must return to shape — is more reliable than copying the hardness of the part being replaced, which may itself have been a compromise.

As with all urethane systems, water is the enemy. Damp moulds, humid air and moist fillers cause foaming and voids that ruin load-bearing parts. Components are kept sealed and dry, moulds are dry and at working temperature, and pressure casting is used where internal voids are unacceptable.

Many cast elastomer parts are bonded to a metal core — rollers, wheels, mounts. That requires the correct surface preparation and a bonding agent suited to the elastomer; without it the elastomer separates in service. State whether inserts are involved so the appropriate system and preparation are confirmed.

Working properties are configurable options within this canonical product, not separate products. Depending on the family, that can include grade, viscosity, mix ratio, pot life and demould time, hardness, colour, particle size or fibre length, and pack format. No configuration is presented as stocked or approved until it is confirmed against the supplier's technical data for the exact material offered. Supplier grade names, factory codes and manufacturer brands are not published here.

Send the part function and loads, the required hardness or the behaviour you need, part size, whether metal inserts are bonded in, and the quantity per run.