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Toxics Use Reduction Institute · Surface Solutions Laboratory
 
Toxics Use Reduction Institute




Surface Solutions Laboratory

Trial Report



Trial Number 7

(Client Number 244, Project Number 1)

Trial Purpose: To evaluate drying times for additional floor finishes.

Date Run: 06/21/05

Experiment Procedure:
The moisture content at the time of testing will influence results due to the hydroscopic nature of the base materials. Therefore, efforts must be taken to ensure that the moisture content and temperature remain constant during the evaluation period. Ideally, the sample floor should be kept at 65+/-1% relative humidity and 68+/-6 F.

During laboratory testing, conditions were slightly drier, 40% relative humidity, but the temperature was within the given temperature range ~70 F).

The flooring material supplied was Hardwood flooring made from Red Oak. The boards were ?? thick, 2 ?? wide and cut into 8? sections. Some pieces of the flooring had to be sanded prior to making initial thickness readings to remove residual packing tape adhesive.

Three coupons were coated with a supplied floor finish according to the manufacturers? specifications. The finish was applied using a 1? Pure Bristle 1500 paint brush. To ensure consistent coating application, the finish was leveled off using a 10 mils Precision Gage & Tool Co Dow Film Caster. Three coats were used for each floor finish as this was common number of coating layers suggested by the various manufacturers. Each coating layer was allowed to dry for 2 hours prior to the application of the next coat. Completed coupons were allowed to sit for a minimum period of 24 hours before performance evaluations were conducted.

During the sample preparation with floor finish, drying times were monitored. Observations were made after the first coat at every 10 minutes until the finish was dry to the touch. The amount of drying completed during each time interval was estimated and recorded. Subsequent coats were analyzed in the same manner. Drying times for each finish were compared to each other.

Trial Results
Observations made were based on the approximate area that looked and felt dry. 

Drying Times (minutes)      Observations % Dry  - qualitative visual assessment
First Coat                              10  20  30   40  50  60
Capitol Hydro 202 Satin                 60  80  97   100 
AFM Safecoat Polyureseal BP Satin       40  90  100
AFM Safecoat Polyureseal BP Gloss       20  60  85   95  97  100

Second Coat                             10  20  30   40  50  60
Capitol Hydro 202 Satin                 40  85  100
AFM Safecoat Polyureseal BP Satin       50  85  970  100
AFM Safecoat Polyureseal BP Gloss       25  80  95   100

Third Coat                              10  20  30   40  50  60
Capitol Hydro 202 Satin                 40  80  95   100
AFM Safecoat Polyureseal BP Satin       30  65  80   100
AFM Safecoat Polyureseal BP Gloss       40  65  85   100


Success Rating
A cleanliness study, addressing only various analytical techniques.

Conclusion
All three products had similar dry times. Only one product need over 40 minutes to dry during the first coating. Additional coats did not dry as fast as the products in the previous set of floor finishes.