Simpson CI-PO Paste-Over and Structural Repair Epoxy from Simpson Strong-Tie is a fast-curing, two-component, high-modulus, high-solids, moisture-tolerant, thixotropic epoxy formulated for securing injection ports at the concrete surface prior to injection repair, as well as for general structural concrete repair applications. Its gel-viscosity consistency holds in place without sagging, making it equally effective on vertical and overhead surfaces, while its NSF-listed formulation confirms it is safe for potable water applications. This 3-gallon bulk kit includes two 1-gallon cans of Component A and one 1-gallon can of Component B, and is compatible with both standard Crack Injection dispensing tools and metered pressure-injection equipment for flexible, professional-grade use on the jobsite.

Key Features

• Chemically bonds with concrete for structural repair - delivers a true load-bearing fix, not just a cosmetic surface patch, so repaired cracks regain structural integrity.
• Gel-viscosity, moisture-tolerant formulation - adheres reliably to both dry and damp concrete surfaces, eliminating the need to wait for full surface drying before beginning repairs.
• Non-shrink formula - maintains consistent volume as it cures, preventing voids or gaps that could compromise the repair over time.
• Freeze-thaw resistant - retains performance through repeated temperature cycling, making it suitable for exterior and cold-climate concrete repair applications.
• Dispenses with standard Crack Injection (CI) dispensing tools - works with existing equipment most concrete repair professionals already own, reducing the need for additional tool investment.
• Compatible with metered pressure-injection equipment - supports high-volume bulk dispense workflows, saving time on larger commercial or infrastructure repair projects.
• Meets ASTM C881 and AASHTO M235 standards - independently verified compliance (Type I, Grade 3, Class B and Type I/IV, Grade 3, Class C) gives specifiers and inspectors the documentation they need for regulated projects.
• NSF-listed safe for potable water - qualified for use in water-contact applications, expanding the range of environments where this epoxy can be specified with confidence.

Why This Product

• One epoxy, multiple critical roles - the CI-PO handles port-securing, crack paste-over, and structural concrete repair in a single product, streamlining procurement and reducing the number of materials crews need to manage on the job.
• Works when surfaces aren't perfectly dry - the moisture-tolerant, gel-viscosity design means repairs don't have to be delayed for surface conditions to improve, keeping projects on schedule even in humid or damp environments.
• Built for verified, regulated applications - dual compliance with ASTM C881 and AASHTO M235 along with NSF potable water listing means the CI-PO can meet specification requirements on municipal, infrastructure, and commercial projects where third-party standards are mandatory.
• Flexible dispensing for different project scales - compatibility with both standard CI dispensing tools and metered pressure-injection equipment means the same bulk kit can support targeted crack repairs and larger-scale injection repair workflows without switching products.

Specifications

• Brand: Simpson Strong-Tie
• MPN: CIPO3KT
• Capacity: 3 gal.
• Components: Two-component epoxy (Part A and Part B)
• Substrate Temperature Range: 40 deg.F (4 deg.C) to 90 deg.F (32 deg.C)
• Viscosity: Gel (thixotropic)
• Standards: ASTM C881 & AASHTO M235, Type I, Grade 3, Class B; ASTM C881 & AASHTO M235, Type I/IV, Grade 3, Class C
• NSF Listed: Yes - safe for potable water (refer to NSF listing for NSF 61 - listed application)
• Country of Origin: United States

Approved Applications

• Securing injection ports at the concrete surface prior to injection repair
• Paste-over of cracks up to 1/4" (6 mm) in width
• Structural repair of concrete
• General concrete repair applications
• Use on dry and damp concrete surfaces
• Compatible with metered pressure-injection equipment for bulk dispense

What's Included

• (2) 1 US gallon (3.8 L) cans of Component "A" (CIPO1A)
• (1) 1 US gallon (3.8 L) can of Component "B" (CIPO1B)

Frequently Asked Questions

What substrate temperatures are acceptable for using the CI-PO epoxy?

The CI-PO is suitable for general concrete repair applications when substrate temperatures are between 40 deg.F (4 deg.C) and 90 deg.F (32 deg.C). Use outside this range is not recommended.

Can the CI-PO epoxy be used on wet or damp concrete surfaces?

Yes. The CI-PO features a gel-viscosity, moisture-tolerant formulation that allows it to be used on both dry and damp concrete surfaces without compromising adhesion or performance.

Is the Simpson CI-PO epoxy safe for use in potable water applications?

Yes. This product is NSF-listed safe for potable water. Please refer to the NSF listing for the specific NSF 61 - listed application details.

What standards does the CI-PO epoxy meet?

The CI-PO meets the requirements of ASTM C881 & AASHTO M235, Type I, Grade 3, Class B and ASTM C881 & AASHTO M235, Type I/IV, Grade 3, Class C, confirming its suitability for structural concrete repair applications.

Downloads and Resources

• Epoxy Crack Injection Guide
• CI-PO SDS Material Safety data Sheets