Best Two Part Epoxy for Concrete: Top Picks for Anchoring and Crack Repair
Choosing the right two-part epoxy for concrete depends on project type, environmental conditions, and required strength. The following five products represent popular, high-performing options for anchoring threaded rods, bolts, and dowels, as well as repairing cracks and filling gaps in concrete and masonry. This guide contrasts features, application ranges, and suitability for indoor and outdoor use to help you decide which epoxy best fits your job—whether you’re restoring a foundation, securing structural supports, or performing DIY repairs.
Summary of selected products:
| Product | Brand | Use | Size |
|---|---|---|---|
| PC-Concrete Epoxy Adhesive Paste for Anchoring and Crack Repair | PC Products | Anchoring and crack repair | 8.6 oz cartridge |
| PC-Masonry Epoxy Adhesive Paste | PC Products | Masonry crack filling and repairs | 32 oz (two jars) |
| PC-Concrete Epoxy Adhesive Paste (102 oz) | PC Products | Anchoring and crack repair | 102 oz (two pails) |
| Gorilla 2 Part Epoxy, Clear | GORILLA | General repairs, gap filling | 0.85 oz syringe (pack of 2) |
| FixMaster Multi Purpose 2-Part Epoxy | FixMaster | Anchoring and crack repair | 9.5 oz |
PC-Concrete Epoxy Adhesive Paste for Anchoring and Crack Repair
This two-part epoxy paste is designed to fill cracks and anchor threaded rods, bolts, and dowels into concrete, grout-filled block, and unreinforced masonry. The formulation features a high-tack paste that resists moisture, making it suitable for damp environments and vertical applications. It supports indoor and outdoor use with an application temperature range from 35 to 115 degrees F and a service temperature range from -20 to +115 degrees F, meeting common construction and repair needs across a variety of climate zones.
Applications: Ideal for structural anchors, crack repairs, and rebar dowels in concrete and masonry. The moisture-resistant properties help prevent loss of adhesion in humid settings, while the paste consistency aids in vertical installations where gravity would otherwise challenge a liquid epoxy.
Considerations: For best results, clean and roughen the surface as needed, follow curing guidelines, and be mindful of working time in relation to temperature. The product’s versatility makes it a reliable choice for both professional and DIY projects.
PC-Masonry Epoxy Adhesive Paste
This two-part masonry repair epoxy paste is designed to replace missing concrete or fill cracks in deteriorating masonry. It resists moisture and can be applied to both wet and dry surfaces, making it suitable for indoor or outdoor use. The product supports a broad application temperature range of 35 to 115 degrees F and a service range from -20 to +200 degrees F, enabling stability across extreme conditions. It can be a practical option for restoring foundation blocks, brick walls, and other masonry components where structural integrity is a concern.
Considerations: It’s important to match the epoxy’s strength to the load expectations of the repair. For large cracks or structural repairs, consider additional reinforcement or professional assessment. The paste form can be advantageous for uneven surfaces or confined spaces.
PC-Concrete Epoxy Adhesive Paste for Anchoring and Crack Repair (102 oz)
This two-part epoxy adhesive paste is intended for anchoring threaded rods, bolts, and dowels into concrete and for crack repair in concrete and masonry. Like other PC-Concrete products, it offers moisture resistance, enabling use in damp environments, and can be applied in vertical positions. The expanded size (102 oz in two pails) provides a practical option for larger projects, offering extended work time and coverage for substantial repair tasks. It supports indoor and outdoor applications at a temperature range of 35 to 115 degrees F and a service temperature range of -20 to +115 degrees F.
Applications: Suitable for major anchoring jobs, rehab projects, and structural repairs in concrete, grout-filled block, and unreinforced masonry. The two-pail format helps maintain consistency across large jobs and reduces mid-project material changes.
Gorilla 2 Part Epoxy, Clear
Gorilla’s two-part epoxy resin cures clear, delivering a clean finish and strong bond suitable for household and automotive repairs. Its 5-minute set time allows for quick repositioning and adjustments, making it practical for smaller or time-sensitive projects. In addition to bonding, the epoxy functions as a gap filler, accommodating irregular surfaces and aiding in vertical bonding where consistency is crucial. Although designed for general repairs, its clear finish provides a visually discreet option for visible concrete repairs or decorative installations.
Considerations: While convenient for rapid repairs and cosmetic applications, check required load-bearing performance for structural tasks. The fast set time is advantageous for small repairs but may require swift handling and precise alignment.
FixMaster Multi Purpose 2-Part Pure Epoxy
FixMaster offers a high-strength two-part epoxy designed for anchoring and crack repair in concrete and masonry. It is described as ICC-approved and compliant with ASTM C881 Type IV, Grade 3, Class A, B, C—indicating strong performance for structural applications. The product is suitable for interior and exterior use across horizontal, vertical, and overhead installations, and it emphasizes maximum structural load values and holding power within the 2-part epoxy category. An extra nozzle is included to extend usability for multiple jobs.
Applications: This epoxy is positioned for demanding anchoring tasks and crack repairs where durability and code compliance matter. It’s suitable for a range of substrates, including concrete blocks, masonry, and natural stone, making it a versatile option for contractors and DIY enthusiasts tackling larger repairs or new installations.
Buying Guide
Key purchase considerations include bond strength, cure time, temperature range, moisture resistance, and applicable substrates. For anchoring, prioritize products with high early strength and moisture tolerance, especially in damp or wet environments. For crack repair, choose epoxies formulated for masonry and concrete with good gap-filling properties and resistance to shrinkage.
Temperature and cure: Temperature affects working time and final strength. In cooler environments, select products labeled for low-temperature application. In hot conditions, ensure the epoxy will not overheat during mixing or application. Always follow surface preparation guidelines—clean, dry, and roughen if needed—to maximize adhesion and longevity.
Packaging and size: Larger pails or jars are cost-effective for bigger projects but require proper storage. If you’re working on small repairs, consider smaller cartridges to minimize waste and ensure fresh mixture. Check for included nozzles or mixing tools, since some products come with extra nozzles or reusable components that reduce costs over time.
Code and compatibility: For structural anchoring and building code compliance, verify ICC and ASTM approvals noted by the product. Consider substrate compatibility—some epoxies work better with concrete, while others perform well on masonry or grout-filled blocks. If repairing historical or exposed concrete, look for a clear epoxy option to maintain aesthetics while preserving strength.
Summary: For small, quick repairs, Gorilla 2 Part Epoxy offers speed and gap filling. For larger anchoring and crack repair tasks, PC-Concrete and PC-Masonry products provide robust moisture resistance and wide application ranges, with substantial kit options for bigger jobs. FixMaster presents a high-strength, code-compliant alternative for professional-grade projects, while DCP Quickmast and similar systems offer versatile, rapid-setting solutions for rebar and threaded-rod anchoring in concrete. Evaluate project scale, environmental conditions, and required strength to select the best epoxy for your concrete work.