OnePass®: Wall Repair Material & Joint Compound

Use OnePass® for general construction and repair of wallboard, cement board, magnesium oxide board, plaster, smooth stucco, masonry, some wood repair applications and many other surfaces. OnePass is formulated with premium-grade hydraulic cement, high-performance polymers and quality, finely ground aggregate.  It is a fast-setting, weather-resistant and mold-resistant construction material that works well in wet areas.  Apply OnePass on many types of interior and exterior surfaces, from featheredge to 1-inch deep in a single, full-depth application. Paint in 90 minutes and complete your job the same day.  One 25-pound bag covers approximately 77-square feet at 1/16-inch deep.  One 9-pound box covers approximately



The Datasheet explains the performance and technical characteristics of Rapid Set® OnePass®.  It also shows how to use OnePass (i.e. surface preparation, mixing, placement and curing).

The Spanish Datasheets are also available here.


General construction and repair of wallboard, cement board, magnesium oxide board, plaster, smooth stucco, masonry, some wood repair applications and many other surfaces


Q: Can I use OnePass® over a painted surface?
A: Yes, but any chipped or cracked paint should be removed first. The painted surface should be sanded with heavy grit sandpaper first to give the OnePass something to mechanically bond to.

Q: What color is OnePass?
It is an off-white color that when dry will roughly match the color of the drywall.

Q: How much working time do I have with OnePass?
A: At normal temperatures, OnePass will start to stiffen up after about 20 minutes and will reach initial set in about 45 minutes. Cold water and material will slow down the set time, and warm water and material will speed up the set time.

Q: If OnePass is supposed to be set after 45 minutes, why does it still look wet?
A: If the patch is deep, the OnePass may take slightly longer to cure. This may cause the color to be slightly darker even though the material is completely cured.

Q: What coverage can I expect from a 25-lb. bag of OnePass?
A: Each 25-lb. bag of OnePass will cover an area of 77 square feet at 1/16-inch depth (skimcoat).

Q: Is OnePass waterproof?
A: OnePass is a weatherproof indoor/outdoor repair material and will stand up to moist conditions, however, OnePass will not create a waterproof barrier.


Safety Information

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

Calculations and Charts
Leed Product Evaluation

TechnicalSupportWe are here to help. If you want to know which Rapid Set products to use for your project, how to set a post, how to fix something that didn’t turn out the way you expected, if we have a product for you to repair something that went wrong with someone else’s product, and where to find our products, let us know. Contact us at DIYSupport@ctscement.com or 800-929-3030.

ConcreteCalculatorFind out how much concrete to use before starting your project so that you’re not left with excess material. Use our Concrete Calculator to quickly and easily determine the amount of product you need.

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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