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Reducer / Retarder Thinner & Extender


CrystaLac Viscosity Reducer / Retarder is designed for thinning and extending the dry time of CrystaLac Coatings.

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4.5 oz

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Get even more from your CrystaLac products

CrystaLac Viscosity Reducer / Retarder is designed for thinning and extending the dry time of CrystaLac Coatings.

Product Details


  • Fuller Spray Coverage – Enhances spray atomization and improves flow out and leveling. 
  • Your Non-Toxic Companion – Can be mixed into any of our CrystaLac Paints, Stains or Top Coats, which are always non-toxic and low VOC.


  1. Environment: Apply in an environment between 68-72ºF.
  2. Prep: Add approximately 1 oz. of the reducer per pint by slowly stirring into CrystaLac Paints, Stains or Top Coats.
  3. Dry Time: This product is intended to extend the dry time of our products. Adding more than 1 oz per pint, will significantly slow the dry time and extra dry time will need to be given between coats.


  • Store at room temperature in a dry place, out of direct sunlight.
  • Do not subject the product to freezing or hot temperatures.
  • CrystaLac products have a shelf life of 5 years after opening.
  • Use in an environment above 68ºF.

Safety info

  • Keep out of reach of children.
  • Do not allow children to use the product unsupervised.
  • If using a spray application method, wear proper eye and respiratory protection.

All of our products are water-based, low-VOC, making them non-toxic, environmentally friendly, and easy to use.

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Customer Reviews

Based on 4 reviews
Doug Otto
Really makes a difference

When spraying this really makes a difference. It lays down so nice and smooth it barely needs level sanding. Don't spray Britetone without it.

Philip Ingber
Excellent product. Makes a great product even better

This is my first time using Crystalac, so I’ve been experimenting with it. With the help of the great support from the people Crystalac, they suggested I try the reducer to give me a bit more time to reduce brush strokes. Fantastic. It worked beautifully and now I’m ready to proceed to the actual instrument, an acoustic guitar finished with turquoise trim.


Love, love, love Crystalac tumbler products!!


Works great