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. SpecPrep SB offers up to a 24 hour open time and a structural bond for fresh concrete or repair mortars to existing concrete. SpecPrep SB also provides an anticorrosion, protective coating for steel rebar in concrete restoration. SpecPrep SB will resist penetration of water and chlorides but will not form a vapor barrier after cure.
- Bonds fresh concrete to hardened concrete.
- Bonds steel to fresh concrete.
- Anti-corrosion coating for steel reinforcement.
- Breathable for exterior on grade applications
- long open time up to 24 hours
- Easy to apply by spray or brush
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.
Standards
- VOC Compliant/Solvent Free = 0 grams per liter