SpecPrep SB 
Structural concrete bonding agent/anti-corrosion reinforcement coating
SpecPrep SB is a three-component, long open time, cement/epoxy bonding adhesive and anti-corrosion rebar coating. It offers a 24-hour open time and provides a structural bond for fresh concrete or repair mortars to existing concrete. Additionally, it serves as an anti-corrosion protective coating for steel rebar in concrete restoration, effectively resisting water and chloride penetration without forming a vapor barrier after curing.
- Provides a long open time up to 24 hours for flexible application.
- Bonds fresh concrete to hardened concrete and bonds steel to fresh concrete.
- Suitable for use both interior and exterior, above or below grade.
- Provides an anti-corrosion coating for steel reinforcement.
- VOC compliant and solvent-free.
Application
Surface Preparation:
- Ensure surfaces are clean and structurally sound.
- Remove all oil, grease, dirt, laitance, rust, and curing compounds.
- Abrasive blast cleaning and mechanical removal methods are recommended to achieve a Concrete Surface Profile (CSP) of CSP 5-7 per ICRI Guideline # 310.2-1997.
Mixing Instructions:
- Ready to use; do not thin with solvents.
- Condition materials to a minimum of 60°F before use.
- Mix 1 part of Part A with 1 part of Part B for 1 minute using a low-speed drill with a Jiffy mixer or paddle.
- Slowly add the pre-measured Part C to achieve a smooth, lump-free consistency over 3 minutes.
- Mix only what can be applied within the pot life.
Application:
- Apply SpecPrep SB to the saturated surface damp (SSD) substrate using a stiff brush or hopper gun.
- For bonding, apply at a rate of 65-75 sq ft per gallon to a minimum thickness of 20 mils.
- The material can act as an effective bonding agent for up to 24 hours at approximately 65°F.
Packaging
Available in 1-gallon units and 3.75-gallon units.
Test Data
- Compressive Strength (ASTM C109): 3 days: 3,200 psi; 7 days: 6,200 psi; 28 days: 8,250 psi.
- Flexural Strength (ASTM C348): 28 days: 1,285 psi.
- Bond Strength (ASTM C882): 7 days with 1-hour open time: 2,490 psi; 24-hour open time: 2,550 psi.