Extender is a wetting additive used to improve flow and leveling, and increase the drying time of any water-based stain, topcoat or glaze, which is helpful in hot, dry conditions.  




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General Finishes Enduro Extender, 16 oz Bottle


How To Use General Finishes Extender

General Finishes Extender is a water-based product that extends the dry time of all General Finishes water based topcoats, stains, and paints. Do not use with oil-based products. 

Extender Application Steps
Pour into GF water-based products as needed in small increments; start with 5%, increase up to 15% by volume. Stir well before use.

All mixes of General Finishes water-based products containing General Finishes Accelerator CAN be stored.

Cleanup of Water Based Products

Application tools and materials containing water-based products can be cleaned with soap and water or GF Brush & Gun Cleaner immediately after use.

Product Spills
Spills may be able to be removed from fabric and carpet if cleaned immediately with soap and water.

Storage of Additives

Life of Product
Water-based products do not last forever, even when unopened. General Finishes products are best used within 1 year of the manufacture date listed on the bottom of the bottle. The life of the product may be extended with proper care and storage.

Storage Tips
Water-based finishes crystalize and form a skin due to evaporation containers are open. The following best practices will increase the life of your product:

  1. Keep the bottle closed when not in use. Pour what you will use into a bowl, paper cup, or plate, and close the lid as you work.
  2. Store in moderate temperatures. Follow best practices by avoiding temperatures below 50°F/10°C or above 80°F/26°C. Our topcoat additives will not freeze due to the high solvent content; however, heat-damaged product cannot be revitalized. Temperature-controlled spaces, such as a basement, are ideal for storage. Do not store product in an attic, garage, in direct sunlight, or next to something hot like a water heater or furnace.

Storing Mixed Product
Mixes of General Finishes water-based products thinned with up to 15% General Finishes Extender or General Finishes Accelerator can be stored.

Warnings and Warranties

Compatibility: Do not use water-based products with Linseed Oils or Danish Oils.

Limited Warranty
General Finishes products must be tested to your complete satisfaction before using. General Finishes will not be responsible for color satisfaction, misapplication, nor compatibility with other manufacturers' products. General Finishes will be responsible only for the cost of our products, and not for costs such as labor, damage or project replacement. 

Contamination and Compatibility
Our finishes are engineered as a system and are compatible with each other. General Finishes cannot guarantee an ideal refinish when applying our products on top of or combined with another company's products or over surfaces that have been in contact with waxes, polishes or sprays containing contaminants such as silicone. Test for adherence and aesthetics before beginning. 

Danger: Contents are COMBUSTIBLE. Keep away from heat and open flame. Application materials or other waste soaked with this product may spontaneously catch fire if improperly discarded. Immediately after use, place rags, steel wool or waste in a sealed, water-filled, metal container. Dispose of in accordance with local fire regulations.

CAUTION: Contains ALIPHATIC HYDROCARBONS. VAPOR HARMFUL. Use only with adequate ventilation. DELAYED EFFECTS FROM LONG-TERM OVEREXPOSURE. Contains solvents which can cause permanent brain and nervous system damage. Intentional misuse by deliberately concentrating & inhaling the contents can be harmful or fatal.

If you scrape, sand, or remove old paint, you may release lead dust. LEAD IS TOXIC. EXPOSURE TO LEAD DUST CAN CAUSE SERIOUS ILLNESS, SUCH AS BRAIN DAMAGE, ESPECIALLY IN CHILDREN. PREGNANT WOMEN SHOULD ALSO AVOID EXPOSURE. Wear a NIOSH-approved respirator to control lead exposure. Clean up carefully with a HEPA vacuum and a wet mop. Before you start, find out how to protect yourself and your family by contacting the National Lead Information Hotline at 1-800-424-LEAD or log onto www.epa.gov/lead.

Do not swallow; first aid: drink water to dilute product. May cause eye and skin irritation; first aid: flush eyes thoroughly with water.

FIRST AID: In case of eye contact, flush thoroughly with large amounts of water for 15 minutes and get medical attention. For skin contact, wash thoroughly with soap and water. In case of respiratory difficulty, provide fresh air and call physician. If swallowed, do not induce vomiting. Get medical attention immediately. 

This product contains a chemical known to the State Of California to cause cancer and birth defects. Do not swallow; first aid: drink water to dilute product. May cause eye or skin irritation; first aid: flush eyes thoroughly with water.


Basic Features
Product Colors Clear
Base Type Water
Ambering No
Interior or Exterior Interior/Exterior
Type Performance/Additive
Application Method Add up to 15% to water based products.
Can Sizes 4 oz. bottles, 16 oz. bottles, Gallons, 5 Gallon pails
Technical Data
VOC 1.025 kg/L