• Sealing capillary tubes
  • Securing MicroTubes into CrystalCaps
  • Securing CryoLoops into MicroTubes


  • Fast setting
  • Excellent cohesive strength


Double/Bubble® Epoxy HR4-347 extra fast setting with a work time of 3 to 5 minutes. The preferred epoxy for cryocrystallography. Sold as a pack of 5. Hardman Double/Bubble Fast-Setting Epoxy is an extra fast setting, two part, room temperature curing epoxy adhesive. It has a convenient mix ratio, excellent cohesive strength and bonds to most substrates including metal, wood, concrete, ceramics and many plastics. The Double/Bubble package is a handy, dual-pouch, one-shot, job-size packaging concept. Fills gaps, will not shrink. Contains no solvents. Two part epoxy in a single, dual-pouch 3.5 gram packet.

To use:
1. Fold Double/Bubble packet
2. Cut or tear to open end
3. Squeeze out adhesive
4. Mix parts A and B together with supplied spatula

Supplied as 5 packets with 5 spatulas.

Color/Appearance: Amber
Product Name: Hardman DOUBLE/BUBBLE Extra-Fast Set Epoxy Red Package 3.5 g Packet 1 part or 2: 2 part
Base Chemistry: Part A: Epoxy; Part B: Polymer
Handling strength: 15 to 30 minutes at 25°C
Cure Time: 24h at 25°C
Durometer/Hardness: 80 D at 25°C
Flash Point: Part A: 190.5°C; Part B: 132.2°C
Mix Ratio: 1:1
Peel Strength: 1.8 pli at 25°C
Service Temperature: Up to 82°C
Shear Strength Psi: 3,000 at 25°C
Specific Gravity: Mixed: 1.16 at 25°C
Viscosity Cp: Mixed: 40,000 at 25°C
Work Life/Pot Life: 3 minutes




Double/Bubble Epoxy


5 pack