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Halftime Plaster Accelerator: A Time-Saving Tool for Plastering Projects

Need to speed up plaster setting times? Been in the middle of a plastering project and realised you're just waiting around for what seems like hours? Maybe you're working on a small area that needs to be finished quickly. In these situations, Halftime Plaster Accelerator can be a lifesaver.

What is Halftime Plaster Accelerator?

Halftime Plaster Accelerator is a chemical additive that speeds up the setting time of finishing plaster. It works by accelerating the formation of crystals in the plaster, which causes it to harden and set more quickly. This can be a huge advantage when you need to get the job done fast.

Benefits of Using Halftime Plaster Accelerator

  • Reduced plaster setting times: Halftime boasts a reduction in setting times by up to 60 minutes, depending on factors like temperature and humidity. This allows you to work more efficiently and complete projects faster.

  • Ideal for small areas: When working on small patches or repairs, halftime accelerator can be particularly useful. It allows you to apply the plaster, finish the job, and move on to the next task without waiting for hours.

  • Compatible with most finishing plasters: Halftime is designed to work with a variety of finishing plasters, so you can use it with your favourite product.

  • Tested and proven: Halftime is the only plaster accelerator that has been extensively tested by UKAS accredited laboratories to the latest British Standards to ensure a consistent setting profile. No measuring, experimenting or guess work required, just guaranteed results every time.

How to Use Halftime Plaster Accelerator

Using halftime plaster accelerator is a simple process:

  1. Prepare your mixing bucket: Fill it with clean, fresh water.

  2. Add the accelerator: Open a sachet of halftime and whisk it thoroughly into the water.

  3. Mix in the plaster: Gradually add your finishing plaster to the water mixture, whisking constantly until you achieve a smooth, lump-free consistency.

  4. Apply the plaster: Apply the mixed plaster as you would normally.

Important Things to Consider

  • Working time: While halftime reduces setting time, it also reduces your working time with the mixed plaster. Be prepared to work quickly and efficiently once you've mixed your plaster with the accelerator.

  • Ambient conditions: The effectiveness of halftime can be influenced by temperature and humidity. Colder temperatures and higher humidity will slow down the setting process, even with the accelerator.

  • Follow instructions: Always follow the manufacturer's instructions for proper use and dosage of halftime plaster accelerator.


Halftime plaster accelerator is a valuable tool for skilled plasterers. It can help you save time, improve efficiency, and complete your projects more quickly. Just be sure to use it correctly and consider the working conditions to ensure a successful outcome.


Halftime is available from Wickes, Travis Perkins, Selco, B&Q, Huws Gray, JT Atkinson, JT Dove, MKM, and online through TW Wholesale and Plasterers 1Stop Shop.

Browse our range of plaster additives and scrim here or contact us today for more information.



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