FORTA CAST-MASTER® is an easy-to-place, fully oriented, 100% virgin homopolymer polypropylene fibrous reinforcement and is a fiber specifically designed and engineered by FORTA® for the precast industry.

FORTA CAST-MASTER is used to reduce plastic and hardened concrete shrinkage, improve impact strength, reduce handling stresses, and increase fatigue resistance and concrete toughness. This extra heavy-duty fiber offers optimum bonding power, maximum long-term durability, sharper edge control, and quick and uniform fiber distribution by incorporating a unique twisted-bundle fiber technology with a fibrillated pattern and long length fiber option. Non-corrosive, chemically inert, and 100% Alkali Proof!


FORTA CAST-MASTER can improve every precast product and is compatible with all precast production manufacturing technologies. It is used to reduce slumping, cracking, and fallouts during precast stripping procedures – it increases production. FORTA CAST-MASTER meets all A.S.T.M. C-1116 requirements and is safe to use.

Requires No Mix Design or Placement Changes!


Recommended dosage rate of FORTA CAST-MASTER is 1.6 lbs. per cubic yard (1.0 kg. per cubic meter) of concrete added directly to the concrete mixing system during, or after, the batching of the other ingredients, and mixed at the time and speed recommended by the mixer manufacturer (usually four to five minutes).

FIBER EXPERTS ON STAFF Ready to Answer Questions & Aid in Technical Support

What makes FORTA CAST-MASTER® special?

The twisted-bundle configuration allows for quick mixing and even distribution, even at longer fiber lengths, which is valuable to the toughness of many precast products.

What are the benefits of this fiber?

FORTA CAST-MASTER is a unique twisted-bundle fibrillated (net-shaped) fiber that mixes quickly and evenly in most all precast concrete mixing systems. Due to the heavy-duty nature of this fiber, FORTA CAST-MASTER is a viable alternate to non-structural handling steel reinforcement in a wide variety of precast products.

What are the features of this fiber?

The FORTA 4-C’s Fiber Characteristics for FORTA CAST-MASTER are:

Configuration — heavy-duty twisted-bundle fibrillated (net-shaped) fiber
Chemistry — 100% virgin polypropylene natural white in color
Contents — typically dosed at 1.6 lbs. per cubic yard of concrete
Correct Length — available in 3/4″, 1-1/2″, 2-1/4″, and 2-1/2″ lengths

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