Rapid Set® FIBER: Increases impact resistance and controls shrinkage cracking

For projects requiring secondary reinforcement, FIBER is your solution. Use with Rapid Set® cement products and most other packaged hydraulic cement products, FIBER reinforcing additive increases impact resistance and controls shrinkage cracking in concrete, mortar and grout mixes.



The Datasheet explains the performance and technical characteristics of Rapid Set® FIBER.  It also shows how to use FIBER.


The Material Safety Data Sheet (MSDS) outlines information and procedures for handling and working with Rapid Set® FIBER.  It includes physical and chemical property information, potential hazards, emergency procedures and CTS’s contact information.


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Standard Practices

Q: What is FIBER?
A: It is a synthetic fiber used to reduce shrinkage cracking and increase impact and abrasion resistance in cement mixes.

Q: How much is in a packet?
A: Each packet contains 40 grams (1.41 ounces).

Q: How much do I need to use?
A: Add 1 to 4 packets to achieve the desired reinforcement.

Q: How do I add it to my mix?
A: Add FIBER to your material and water mixture and mix until thoroughly distributed for about 2 minutes.

Q: Can I use it with other additives?
A: It can be used with other Rapid Set® Concrete Pharmacy® items or certain approved additives.

Q: Can I add it to other portland cement products?
A: FIBER can reduce the shrinkage cracking in other portland cement products, however a trial batch is recommended to determine your requirements.

Jobs & Applications

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Leed Product Evaluation

TechnicalSupportWhether you’re working on a time-sensitive project and need answers, or evaluating and choosing the right cement products, or looking to achieve specific results, we are here to help. Get answers to your questions from our technical support team. Find and download useful information from our website. Ask us to help get your construction team up to speed by requesting a jobsite demonstration or educational seminars.

ConcreteCalculatorLearn how Rapid Set’s strength, speed and sustainability help you get better results and finish your jobs sooner. These Charts will show you how.

ProductEvaluationLEED product evaluations summarize a product’s ability to contribute to a variety of LEED credits. These credits include Solar Reflectivity (SS7), Regional Materials (MR4), Recycled Content (MR5), VOC Content (EQ4) and Innovation in Design (ID1).

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