GorillaPro® AR250 is a fast-curing, high-strength anaerobic adhesive designed for locking and sealing threads as well as retaining cylindrical parts. This formula enables larger machining tolerances, making it ideal for slip-fit applications. GorillaPro® AR250 exhibits exceptional resistance to heat, corrosion, vibrations, water, gasses, oils, hydrocarbons, and various chemicals.

Chemical Family: Urethane Methacrylates

Product Type: 1K (1 component) Adhesive, Anaerobic Adhesive, Retaining Compound

Application Area: Cylinders, Thread Sealing

Compatible Substrates & Surfaces: Metal

Features: Acid Resistant, Alcohol Resistant, Chemical Resistant, Corrosion Resistant, Fast Curing, Gassing Resistance, Heat Resistance, High Strength, Hydrocarbon Resistant, Oil Resistant, Slip Fit Retaining, Solvent Resistance, Vibration Resistance, Water Resistant

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Ready-to-Use Product Features
Product Benefits
  • Available in slip fit or press fit formulas
  • Best choices for non-threaded, cylindrical applications
  • Fills inner space between components
  • Cures into a hard thermoset plastic that resists loosening
  • Color coded for grab-and-go
  • Better load transmission and performance
Product Features

Reliable Retaining Compounds
Retaining compounds durably and reliably retain bearings, shafts, studs, and flanges. In general, the need to dismantle these joints is not required, and GorillaPro retaining compounds are designed for high strength to meet this requirement. They achieve uniform stress distribution throughout the joint, making it possible to withstand dynamic and static loads with equal ease.

  • Retaining compounds can fill small gaps within twomated assemblies which allows for less costly part designs
  • Friction corrosion is avoided
  • Replaces clamp rings, set screws, and snap rings, reducing annual maintenance spend

High-Performance MRO Solutions 
Proactive maintenance can help prevent costly unplanned downtime. It’s a challenge keeping up with maintenance activities while keeping teams trained, equipment operating, and driving productivity. With a full complement of maintenance adhesives, repair epoxies, lubricants, and sealants, GorillaPro retaining compounds can repair and improve the reliability of almost any piece of equipment or machinery.

Product Attributes
  • Multi Use: Best for retaining shafts, gears, pulleys, and cylindrical parts
  • Slip-Fit: Allows for more relaxd machining tolerances in slip-fit applications
  • Cost Saving: Replaces clamp rings, set screws, and snap rings

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Application Instruction

Surfaces to be bonded should be clean, dry and free of grease. Product should be applied in enough quantity to fill all engaged threads or gap. The product performs best in thin bond gaps. Very large gaps may create voids that will affect the cure speed and overall strength. Good contact is essential. It is recommended to confirm compatibility of the product with all substrates prior to use. This product is not recommended for use with strong oxidizing materials. Where aqueous washing systems are used to clean the surfaces before bonding, these aqueous washes can affect the cure and performance of the adhesive. This product is not normally recommended for use on plastics, users must check compatibility of the product with such substrates.

Curing Performance
The rate of cure will depend on environmental conditions and the substrates used. The gap of the bond line will affect set speed. Smaller gaps tend to increase set speed. Activators may be applied to further improve set speed, but may also impair overall adhesive performance.


Physical Form
Physical Properties
ValueUnitsTest Method / Conditions
Technology/BaseUrethane Methacrylate--
Type of ProductAdhesive and Sealant--
ComponentsOne Component--
CuringAnaerobic with Secondary Heat Cure--
ConsistencyViscous Liquid--
Viscosity (at 25°C)1500 - 2500cPsBrookfield SC4-27
Specific Gravity1.1--
Cured Mechanical Properties
ValueUnitsTest Method / Conditions
Locking StrengthHigh--
Pin/Collar Shear Strengthmin. 3500psiASTM D4562
Service Temperature-55. to 150°C-
Cured Properties
ValueUnitsTest Method / Conditions
Full Cure Conditions (at 25°C)24.0hours-
Cure AppearanceGreen Solid--
Uncured Properties
ValueUnitsTest Method / Conditions
Flash Pointmin. 93°C-
Gap Fill0.015inch-
Storage Condition20.0°C-

Technical Details & Test Data

Test Data

Set Time On Various Substrates
GorillaPro® AR250 - Test Data
Heating Aging

Aged at Temperature Indicated & Tested at 22°C
GorillaPro® AR250 - Test Data - 1

Hot Strength
%RT Strength, Tested at Temperature
GorillaPro® AR250 - Test Data - 2

Storage & Handling

Shelf Life
12 months
Storage Condition

Products should be stored unopened in a cool, dry place out of direct sunlight. Products may be refrigerated for improved shelf life, but should be brought back to room temperature before use.