What would cause latex paint not to dry?

Answer 1

Extremely humid conditions and perhaps water seepage ont he walls that were painted.

Answer 2

1. Choose a time of day when morning dew is gone and when sunlight is not direct -- if paint dries too fast, lap marks will show and heat blisters may appear if applied in direct sunlight.
2. New wood should be allowed to weather to open the grain of the wood and to remove the mill glaze. This will assure proper penetration of the finish. Weathering also bleaches out natural chemical extractives which cause staining.
3. When using latex paints, the temperature should be above 50 degrees F. - If used in cold weather, latex paint will not dry properly and as a result the paint film will chalk excessively. But if the temperature is above 70 degrees, it is best to paint in shaded areas, following the sun around the house so that the paint won't dry too fast.
4. Two topcoats are recommended to prolong the life of the coating. -- The first should be applied with a brush, rather than a roller or pad, to make sure an adequate film of paint is worked into the surface.
5. After thoroughly mixing, split full gallons of paint between two containers. -- It will be safer and easier to use.
6. Load your brush properly. -- Dip the bristles to half their length and remove excess paint by tapping (not wiping) the brush against the side of the container.
7. For siding, start at an upper corner and paint a deep strip, extending it horizontally to the next corner or to an intervening door or window. Next, starting below the first strip of paint, begin painting a new one, overlapping the dry area with the previously painted area.
8. After the main body has been painted, the next step is to paint wood trim and frames around windows and doors.
9. If possible, shutters should be removed before painting, and then painted on both sides.
10. With new siding or shingles, you may want to backprime before installing the siding. Moisture often attacks wood siding from the back due to condensation of water vapour generated from within the structure. The risk of moisture damage and staining can be reduced by backpriming.

Answer 3

Moisture is the first suspect. In the form of excess humidity on the exterior, or seepage from the surface that has been painted.

Chemical deterioration of the paint, or improper mixing, could also be a factor.

Temperature is a factor as well, but it's a little warm this time of year to suspect improper curing from the cold.

It is unlikely, but a film of oil or other petroleum-based product left on the surface could be a factor.

Try moving a lot of air across the surface, like with an electric leaf blower. If you don't see any curing, you're sunk. Off comes the paint, and you can follow the wonderful guidelines provided by the above answerer.

Answer 4

Lack of air circulation can delay drying. But if it won't dry at all, might have been frozen at some point or overheated, or it might just be really old or defective.

Answer 5

Excessive humidity.

Answer 6

excessive moistue in the air or on the painted surface