SpecPrep SB Structural Concrete Bonding Agent

SpecPrep SB is a three-component bonding adhesive that creates a structural bond between fresh and existing concrete, and doubles as an anti-corrosion coating for rebar

SpecPrep SB offers up to a 24-hour open time and resists penetration of water and chlorides, though it won't form a vapor barrier after cure. It's suitable for bonding fresh concrete or repair mortars to existing concrete, and for protecting steel reinforcement during restoration.

Key Features & Benefits

• Long, up to 24-hour open time
• Bonds fresh concrete to hardened concrete and steel to fresh concrete
• Anti-corrosion coating for steel reinforcement
• Resists water and chloride penetration
• Ready to use — do not thin with solvents

Application Instructions

• 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.

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.

Packaging

Available in 1-gallon units (also offered in 3.75-gallon units).

Supporting Documents

Safety Data Sheet (SDS)

Technical Data Sheet (TDS)

Standards

• VOC Compliant/Solvent Free = 0 grams per liter