*Why Do Milk Paint and Chalk Style Paint Separate in the Can, Even After Stirring?*

The separation is a condition the paint industry calls "float." This is typical with specific colors, such as grays, because of the large variance in the gravities of the pigments required to create those colors. In gray, for instance, Ti02 (white) is 3.4 and black is 1.62. The lower density will float.

This phenomenon will not occur in colors with less variance in densities. Float is not unique to General Finishes products.

Always stir the paint well just BEFORE and DURING use. If there is any delay, the ingredients will start separating. If it is a large project, we recommend continuing to stir throughout use to keep color properties consistent.

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*Can An Oil Based Topcoat Such as Arm-R-Seal Be Thinned?

General Finishes Arm-R-Seal

Although Arm-R-Seal rarely needs thinning because of its low viscosity, it can be thinned with up to 10% mineral spirits - more than that may thin the solids content too much.

Thinned Arm-R-Seal will be diluted but can be stored without risk of separation.

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*Why did my remaining Arm-R-seal thicken in the can?

Oil-based topcoats are "oxidizing" products which means that the moment it is introduced to oxygen, a chemical reaction will cause the finish to begin to harden. As topcoat is used, the empty space in the can is filled with air, furthering the curing process. 

Tips to ensure your Arm-R-Seal remains in great working condition:

  1. Decant the amount of Arm-R-Seal you will need into a foil covered bowl or paper cup and reseal the can right away. Every minute the can is open, the stain is curing.
  2. Be sure to thoroughly clean the chime and the lid of the can to assure a tight seal.
  3. Add Bloxygen to remove excess oxygen from your can of finish before sealing. 
  4. Store your sealed cans upside down. The liquid creates a seal around the lid when stored upside down, preventing air from getting in. 
  5. Transfer any unused finish to a smaller container once finished with your project. StopLoss Bags® are a popular choice. 


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