ITW DEVCON ENGINEERED COATINGS - ITW Futura Coatings

8.0 TOPCOAT APPLICATION
8.1. Irathane 155 is a 65% solids by volume, two (2) component (1:1 mix ratio by volume) elastomeric
polyurethane coating that must be sprayed over Irabond UU 96 coated surfaces.
8.2. Recommended application equipment: 30:1 ratio or larger airless spray unit with a minimum
output of 2 ½ gallons per minute, Teflon packings and either nylon or Teflon lined material hoses.
Spray tip sizes can range from 0.015 to 0.031inches.
8.2.1. Purge all lines and equipment with clean Xylene or Toluene thinner prior to and after spraying
Irathane 155 to prevent a build up of material inside the spray unit and material hoses. Do not
use Ketones, such as MEK, MIBK or Acetone. The use of Ketones will severely affect the
cure of the Irathane 155.
8.3. Refer to the current Irathane 155 Product Data Sheet for mixing and application instructions.
8.3.1. Power mix the "B" component for a minimum of three (3) minutes before combining with the
"A" component in a single container.
8.3.1.1. The “A” component (iso) does not require mixing.
8.3.2. After combining the components, power mix for a minimum of five (5) minutes, scraping the
sides and bottom of the mixing container to blend any unmixed materials, and then "box" to
ensure good mixing.
8.3.2.1. “Boxing” is a method of mixing Irathane products. Following the initial mix in a large
mixing container, pour the mixed material back into the original “A” and “B” component
pails and power mix each for a minimum of one (1) minute. Re-pour these containers
back into the large mixing container and power mix for an additional two (2) minutes.
8.3.2.2. Box mixing assures proper mixing and proportioning of all components as well as
reduces hazardous waste since mixed and cured material can typically be disposed of
as non-hazardous waste.
8.3.2.3. All waste must be handled in accordance with all local, state and federal regulations.
8.3.3. Only full kits of Irathane 155 should be mixed. Do not mix partial kits.
8.3.4. Do not thin or cut the Irathane 155.
8.4. All coating work shall be preceded by a brush-applied, “stripe coat” application to welds, seams,
and edges of difficult to coat surfaces.
8.5. Irathane 155 shall be applied in two (2) or more build passes, using a cross-hatch spray
technique.
8.5.1. The first coat of Irathane 155 shall be applied utilizing a “tack coat” or “mist coat” technique
allowing a dry time of 5 – 15 minutes, followed by a multi-pass build coat of 20-40 mils wet film
thickness.
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04/10 Irathane 155 Steel