How To Mix Phoscrete for Best Results on Every Job
Why Mixing Matters
Proper mixing is the foundation of every strong, fast-setting Phoscrete repair. Following the right steps ensures maximum bond, quick return to service, and a finish that lasts.
Step-by-Step Mixing Best Practices
1. Use Complete Kits: Never split bags or jugs, mix full kits only. Always add the activator first, then the dry mix.
2. Condition Materials for the weather
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- Hot Weather: Chill activator on ice (40°F/5°C), keep bags out of the sun.
- Cold Weather: Warm activator in hot water, keep bags indoors.
Pro Tip:
The right temperature means more working time and smoother finishes.
3. Use the Right Mixer:
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- For small jobs: Use a heavy-duty drill with a paddle or auger.
- For big jobs: Use a mortar mixer (for F1/F3) or the Phoscrete ShotPump for continuous-feed work.
4. Follow the Mixing Time:
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- F1 (MALP): Mix for at least 1 minute.
- F3 (MKP): Mix for at least 2 minutes (longer if cold).
- Stop when the mix is fully wetted and uniform, no dry powder!
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5. Admixtures for Set Control:
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- Fast-Set Admix: Use for colder jobs to speed up set.
- Slow-Set Admix: Use in the heat for more working time.
- Endure Admix: For durability and easy cleanup. See the full admixture chart for exact measurements.
6. Keep Buckets and Tools Clean Effortlessly: Phoscrete mixes clean and doesn’t stick to your paddles or buckets. There’s no need to rinse tools or buckets between batches. Just clean everything with water after the final mix of the day, including your work boots. Hands clean up is easy with soap and water.
Common Mistakes to Avoid
- Adding water or partial kits (throws off chemistry)
- Skipping temperature conditioning (leads to flash set or slow set)
- Under-mixing or over-mixing
- Mixing too much at once for your crew size
- Failing to clean tools (causes sticking and poor finish)
Troubleshooting: FAQs
- Mix setting too fast? Chill activator, use Slow-Set.
- Mix too slow in the cold? Warm activator, use Fast-Set.
- Lumpy mix? Add dry mix slowly, use correct paddle/auger, and mix longer.
Need Help or a Custom Checklist?
Contact your Phoscrete Sales Engineer or call our main office at 561 420-0595 for custom mixing guides, on-site training, or to troubleshoot a tricky job.
For more technical guidance, explore our full installation guides and best practices.
You can also use the live chat on our website or fill out the contact form below.