Ideally, polyurethane basecoats should receive Elasta-Tuff™ 6000-AL-HS as soon as the basecoat surface has cured sufficiently to walk on. In any event it should be topcoated before achieving total cure, which can vary from 2 to 7 days depending upon basecoat used and weather conditions at time of application.
When Elasta-Tuff™ 6000-AL-HS is applied directly to wood, fiberglass, asphalt, or concrete substrates, the following surface preparation procedures should be followed:
Wood Surfaces: Wood should be dry and clean, and free from any dirt, grease, oil, pollution fallout, or other foreign contaminants which could interfere with proper adhesion. Clean surfaces shall be primed with CPES (Clear Penetrating Epoxy Sealer) at the rate of 250 to 300 sq. ft. per gallon (6 to 7 sq. meters/liter). However, the amount of CPES required will vary, depending on the absorbency of the wood.
Old wood or restored wood should be clean and bare and free of any foreign contaminants. We strongly recommend a prime coating of CPES (Clear Penetrating Epoxy Sealer) if the wood shows any signs of deterioration, softness or rot. After the sealer has completely dried/cured, existing hairline cracks should be filled with Fill It Epoxy Filler or 3M™ 4200 or 3M™ 5200 polyurethane sealants. Sealants should be troweled flush with sufficient pressure to fill the cracks and joints completely. At least 2 generous coatings of Elasta-Tuff™ 6000-AL-HS are required on top of the primed surface. Each additional coat should be applied perpendicular to the original coating.
On large new plywood decks or platforms, all the joints must be backed and left with a 1/8" (3 mm) gap between sheets. 3M™ 4200 or 3M™ 5200 polyurethane sealant, or other pure polyurethane sealants, should be applied and troweled flush into the opening. After curing, the seams should have polyester reinforcing fabric embedded into a strip coat of Elasta-Tuff™ 6000-AL-HS.
Fiberglass Surfaces: Fiberglass shall be dry and clean, and free from any dirt, grease, oil, pollution fallout, or other foreign contaminants which could interfere with proper adhesion. All fiberglass surfaces should then be scuff sanded and wiped down with MEK or vacuumed to remove all dust.
Elasta-Tuff™ 6000-AL-HS achieves an excellent bond to fiberglass surfaces prepared in this manner with no primer required. If fiberglass is chalky or oxidized, apply a prime-coat of CPES (Clear Penetrating Epoxy Sealer) at the rate of 300 to 400 sq. ft. per gallon (7 to 10 sq. meters/liter).
Concrete Surfaces: Concrete should be dry and clean, free from any dirt, grease, oil, pollution fallout, smoke, wax, form release agents, surface chemicals, or other foreign contaminants which could interfere with proper adhesion. Surfaces should be free of sharp projections, ridges and loose aggregate.
Sandblasting of concrete will be required if the surfaces are contaminated to the point that acid, chemical cleaning or power washing is not sufficient for removal. Concrete surfaces having a smooth, steel troweled finish must be acid etched or sandblasted.
Prior to sealer application, all loose material, foreign objects, dirt and dust shall be removed by use of a power vacuum. Immediately after vacuuming is completed, concrete surfaces should be sealed with one (1) coat of CPES (Clear Penetrating Epoxy Sealer) or UNISEAL epoxy sealer. Sealer shall be applied by roller or airless spray at the rate of 250 sq. ft. per gallon (6 sq. meters/liter).
After sealer has completely dried, all cracks, control joints, cold joints and voids shall be filled with 3M™ 4200 or 3M™ 5200 or other pure polyurethane sealants. Cracks larger than hairline should be reinforced with polyester reinforcing fabric, embedded into a strip coat of Elasta-Tuff™ 6000-AL-HS. At the intersection of concrete walls and slabs, apply sealant in the same manner, extending a minimum of 1 1/2" (38 mm) vertically and horizontally. Elasta-Tuff™ 6000-AL-HS is not designed to bridge cracks greater than 1/32" (0.79 mm) in width. Sealant shall be allowed to cure a minimum of 24 hours prior to the application of Elasta-Tuff™ 6000-AL-HS.
Asphalt: All asphalt shall be allowed to age a minimum of 60 days prior to the application of Elasta-Tuff™ 6000-AL-HS. A test application is recommended over new asphalt to assure there is no bleed-through of the asphaltic oils. Asphalt surfaces should be primed only with Uniseal, a water-based epoxy sealer.
Prior to sealer application, all loose material, foreign objects, dirt and dust shall be removed by use of a power vacuum or compressed air. Immediately following final cleaning, asphalt surfaces shall be sealed with one coat of UNISEAL. After the sealer has completely dried/cured, existing hairline cracks should be filled by brushing with Elasta-Tuff™ 6000-AL-HS in sufficient quantity to totally hide the crack. All cracks larger than hairline should be considered as "moving" and be cleaned and filled with Fill It Epoxy Filler. The epoxy filler should be troweled flush with sufficient pressure to fill the cracks and joints completely.
Packing and Mixing
The second coat may be applied as soon as the first application is dry enough to accept the roller/brush or as soon as the surface can be walked on. If the first coating remains uncoated for longer than two weeks, it is recommended that the surface be wiped down with xylene before the second coating is applied.
Cure Time: In mild conditions (70°F/21°C, 50% Relative Humidity), cure time for light foot traffic is 24 hours. Cure time for heavy traffic is 72 hours. Cure time is dependent on humidity and temperature. Lower temperatures and lower humidity will lengthen cure time. For application in lower temperatures Elasta-Tuff™ Accelerator is recommended. Do not use Elasta-Tuff™ Accelerator in temperatures above 85°F (29°C).
Elasta-Tuff™ Accelerator: 3 ounces (89 ml) of Elasta-Tuff™ Accelerator should be added at 55°F (13°C). 6 ounces (178 ml) of Elasta-Tuff™ Accelerator should be added at 45°F (7°C). Elasta-Tuff™ Accelerator can be added in mild temperatures up to 85°F (29°C) if a quicker cure is desired.
Elasta-Tuff™ 6000-AL-HS should be applied at the coverage rate of 80-100 sq. ft./gallon (2-2.5 sq. meters/liter) which will theoretically yield 16-20 wet mils 12 ±2 dry mils. Actual gallon required on the job to achieve the minimum dry mil film thickness will depend upon the surface texture, technique of the applicator, and weather conditions at the time of application. It is the responsibility of the applicator to apply sufficient material to achieve the required dry mil film build.
Applications utilizing Elasta-Tuff™ 6000-AL-HS topcoat will normally require a minimum of two coats. All surfaces must be uniformly coated and free from voids, pinholes and blisters. Re-coat time is 24 hours in average temperatures.
Non-skid aggregate (spherical sand or pumice, rubber or cork particulates), if desired, should be broadcast into the second from last coat of Elasta-Tuff™ 6000-AL-HS, or blended into the final coat mix and roller applied to achieve a uniform fine texture finish. We supply silica sand in with your order upon request.
Elasta-Tuff™ 6000-AL-HS should not be applied when the ambient temperature is below 45°F (7°C), or if rain is anticipated within 24 hours of application. Minimum storage temperature of 40°F (4.5°C) is recommended. Store Elasta-Tuff™ 6000-AL-HS in a warm area prior to application for sufficient length of time to bring material temperature to 75°F (24°C).
If thinning is required for application, use xylene solvent sparingly, not more than 5% per volume. Clean equipment with MEK or methylene chloride.
Cleanup, Shelf Life and Storage
Elasta-Tuff™ 6000-AL-HS components are affected by moisture prior to catalyzation and must be protected from moisture contamination. Keep all containers tightly closed during storage. Containers are factory sealed to prevent contamination. After opening and if all components are not to be used, containers must be tightly sealed. Shelf life of an opened container is very limited.
Elasta-Tuff™ 6000-AL-HS and the Accelerator are hazardous products. Check the shipping options on the order form for details on shipping hazardous items.
The Rot Doctor, Inc.
P.O. Box 30612 • Seattle, WA 98113
Voice: 206.364.2155 • Fax: 206.364.4744
© 1997-2013 The Rot Doctor, Inc.
Our business hours are 6:30 AM to 5:30 PM Pacific Time, Monday-Friday.
Tech support is available over weekends.