UNIQUE® High Performance Fast Setting Mortar – FAQs

Answers to frequently asked questions about UNIQUE® Fast Set concrete patching materials.

You’re wondering about UNIQUE® high-performance, fast-setting mortar: Questions about packaging, pavement preparation, preferred applications, placement limitations, curing times, and much more. We’ve got answers.

What type of product is UNIQUE HPFS repair mortar?
UNIQUE High Performance Fast Setting Repair Mortar is a blend of hydraulic cement, graded silica sand and performance-enhancing additives.

What are the preferred applications for UNIQUE HPFS repair mortar?
UNIQUE HPFS repair mortar can be used for repairing concrete on roadways, bridge decks, sidewalks, parking garages, curbs, footings, loading docks, and industrial floors.

How deep or shallow can UNIQUE HPFS repair mortar be used?
UNIQUE HPFS repair mortar can be used from featheredge to 2″ and 2″+ to 6″ deep when extended.

What are the placement limitations for UNIQUE HPFS repair mortar?
Do not use UNIQUE HPFS repair mortar applications on unsound concrete or like surfaces. Not intended for applications over 6″ deep. For deeper applications use UNIQUE® Highway DOT Performance Fast Setting Concrete.

What should I do prior to using UNIQUE HPFS repair mortar for an overlay?
For overlay applications at least one section should be prepared to evaluate the suitability of the materials and procedures.

Can you extend UNIQUE HPFS repair mortar to achieve deeper patching?
Yes with a washed 3/8″ gravel. If you are patching from 2-4″ you should extend it by 25% and from 4-6″ you should extend it up to 50% by weight.

Do I need to add any curing agents or other additives to UNIQUE HPFS repair mortar?
All you need to do is just add UNIQUE HPFS repair mortar to the pre-measured water.

What is the curing time for UNIQUE HPFS repair mortar?
UNIQUE HPFS repair mortar can be opened to foot traffic in 1 hour and vehicular traffic in 2 hours.

How can I delay or speed up the set time for UNIQUE HPFS repair mortar?
You can extend the cure time of UNIQUE HPFS repair mortar by using cold or ice cold water and speed up the set time by using warm or hot water.

What is the best way to cure the UNIQUE HPFS repair mortar?
Damp cure all UNIQUE HPFS repair mortar installations. Begin curing as soon as the surface has lost its moist sheen. Keep exposed surfaces wet for a minimum of 1 hour. When experiencing extended setting times, due to cold temperature or the use of retarder, longer cure times may be required. The objective of damp curing shall be to maintain the continuously wet surface until the product has achieved sufficient strength.

Do I need anything special to clean my tools or other items?
No, UNIQUE® concrete products are water soluble prior to drying. Clean container and tools with water prior to the material drying.

What are the compressive strengths of UNIQUE HPFS repair mortar?
1 hour strength is 2,500 psi. 1 day strength is 5,500 psi. 7 day strength is 6,900 psi. 28 day strength is 8,400 psi.

What is the coverage rate of UNIQUE HPFS repair mortar?
50 pounds of UNIQUE HPFS repair mortar yields approximately 0.44 cubic ft of finished product when mixed with 3.4 quarts of potable water.

What type of packaging is available for UNIQUE HPFS repair mortar?
UNIQUE HPFS repair mortar is available in 50, 20 and 10 pound plastic pails and in 50 lb. poly lined paper bags by special order.

What is the shelf life for a pail of UNIQUE HPFS repair mortar?
Two years if stored in an unopened pail according to ACI Guidelines.

Features and Benefits

Fast Setting – High early strength, Open to foot traffic in 1 hour, open to vehicle traffic in 3 hours

Excellent Adhesion – To concrete surfaces

Durable – Freeze-thaw resistant, Sulfate resistant, Exceeds 300 freeze/thaw cycles

Versatile – Applicable to virtually every horizontal concrete application from featheredge to 6″

UNIQUE® is a registered trademark of UNIQUE Paving Materials Corp.


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