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Stop It® Pipe Repair System

Stop It® AP 125 – Adhesion Promoter

Leak Sealing Products

Stop It® AP 125 - Adhesion Promoter

Better adhesion for plastic and fiberglass pipes.

Our adhesion promoter is a two-part acrylic-based adhesive (1:1 ratio by volume) that can bond many low surface energy plastics, including many grades of polypropylene, polyethylene, and TPOs without special surface preparation.

It enhances the bond between STOP IT® resin and plastic or fiberglass pipes and will be required for applications involving these substrates.


  • Ability to bond dissimilar substrates
  • Ability to structurally bond polyolefins
  • Room temperature cure
  • Excellent water and humidity resistance
  • Very good chemical resistance
  • One-step Process – no pre-treatment of the polyolefin substrates needed
  • Solvent-free adhesive system
  • Convenient hand-held applicator system
  • Available in Bulk


  • One-person application
  • Minimum surface preparation
  • Short cure time
  • Fully compatible with STOP IT® PIPE Repair System

AP125 Adhesion Promoter for PVC and Fiberglass Pipes

Shelf Life: Two years from date of purchase when stored at 40° to 83°F (5° to 28°C)
Color: White or black
Tensile Strength: 24,950 PSI / in width/172 MPa
(ASTM D 3039).

Flexural Strength: 12,005 psi/82.77 MPa (ASTM 790)
Durometer Hardness: 63 (Shore D) (ASTM D 2240)
Pressure Retaining Capability: Recommended for pressures up to 400 psi (28 kg/cm2)
Temperature Resistance: Continuous: -20° to 250°F (-29° to 121°C)
Intermittent: 250° to 500°F (121° to 260°C)
Set Time: 3 to 5 minutes at 50° to 80°F (10° to 27°C)
Cure Time: at 1/2`` thick (1.27 cm) - 30 minutes

Part No Description Case Quantity Case Wt. LBS
Stop It® AP 125 – Adhesion Promoter
AP125050K AP125 50 mL Kit 1 1
AP125400K AP125 400 mL Kit 1 2
Stop It® AP 125 – Dispenser Gun Sold Separately
DG050M Dispenser Gun – Dual Component, Manual, 50 mL 1 1
DG400M Dispenser Gun – Dual Component, Manual, 400 mL 1 5

Shelf Life: 6 months @40°F
Physical Form: Two-part, solvent-free resin system
Mixing Ratio: 1:1
Working Time: 6–8 minutes
Mixed Viscosity: 60,000 cps
Application Thickness: <0.02”
Coverage: Each 50 mL cartridge coats 250 in²
at the recommended thickness;
400 mL cartridge coats ~2000 in²
Water Resistance: High
Chemical Resistance: Very Good

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