If lumps are discovered in a newly opened bag of castable, what action should be taken?

When lumps are discovered in a newly opened bag of castable, discarding the material is the most appropriate action. The presence of lumps often indicates that the castable has been exposed to moisture or has otherwise deteriorated, which can compromise the integrity and performance of the material when used. Utilizing castable with lumps could lead to inconsistent properties in the final product, resulting in weak spots or failed repairs.

Keeping the lumps in the material can affect the bonding and curing process, leading to potential failures in applications where structural integrity is critical. Therefore, ensuring that only quality, uncontaminated materials are used is essential for optimal performance in casting and repairs. Taking the step to discard the compromised castable prevents future issues and upholds safety and performance standards.