Proper mixing and correct component proportions are extremely important to assure optimal results.
Two-part can kits
- Kits consist of the proper proportions of base compound (part B) and accelerator (part A). The entire contents of both containers are intended for mix at one time.
- Before using material, read and understand the process specification and the Material Safety Data Sheet (MSDS), which provides information on health, physical and environmental hazards, handling precautions and first aid recommendations.
- Carefully, remove the rim from Part B container.
- Thoroughly stir Part A in the original container with a flat metal spatula until an even consistency is obtained.
- Slowly stir the entire contents of Part A into the Part B container and thoroughly mix to uniformity for approximately 7 to 10 minutes.
- Scrape the sides and bottom of the container to include all compound in the mixture and assure uniform blending. The mixing spatula should also be scraped clean periodically.
Note: Slow mixing by hand is recommended. A high speed mechanical mixer should not be used as internal heat will be generated reducing application life and introducing air in mixture.
Injection style Semkit® package
- Before using material, read and understand the process specification and the Material Safety Data Sheet (MSDS), which provides information on health, physical and environmental hazards, handling precautions and first aid recommendations.
- Hold cartridge, grasp dasher rod, and pull back approximately one inch.
- Insert ram rod into hollow of dasher rod, break piston loose, and inject about one-third of the contents into the back third of the cartridge.Note: Use even pressure; do not use force, tap, pound, or jolt ramrod if piston does not break loose readily.
- Pull back dasher rod and inject one-third of the rod’s contents at the mid point, then pull back dasher rod and inject the last third one inch from the threaded end of the cartridge. Remove ramrod.
- To mix, hold cartridge and push dasher rod to the plunger end. Begin stroking the dasher rod in a spiral clockwise motion from the end of the cartridge to the plunger. Rotate the dasher rod approximately 90 degrees each stroke. A stroke is one complete in and out cycle. Mix material for the required number of strokes for hand mix, or for the required time for machine mix, as indicated on the instructions provided with the Semkit®.
- After mixing, remove bottom cap.
- Pull dasher rod back to the neck of the cartridge. Grasp cartridge firmly at the neck, unscrew dasher rod and remove.
- Screw nozzle into cartridge, insert into Semco® extrusion gun, and use as required. For hand extrusion, press used dasher rod against plunger to force material from cartridge.
Note: It may be desired to use a Semco Model 388 Automatic Mixer for mixing sealants packaged in cartridges. Mixer does not reduce the number of strokes required for complete mixing, it does allow the material to be mixed easier and faster.