LN 252 Fly Ash Brick Hardener is a chemical additive used in the manufacturing of fly ash bricks to enhance their strength, durability, and overall quality. It helps in reducing water absorption, making the bricks more resistant to moisture. The hardener is designed to improve the compressive strength and hardness of fly ash bricks. These bricks are made from fly ash, a byproduct of coal combustion, along with other materials like cement, sand, and water. LN 252 Fly Ash Brick Hardener contains chemicals that have environmental implications. Choose products with eco-friendly formulations when possible.