ELASTUFF 120 is a highly cross-linked polymer coating, yielding a dense, tight finish. Its nonporous surface and excellent hydrolytic stability make ELASTUFF 120 an excellent barrier to wear and corrosion. The high tensile strength of ELASTUFF 120 contributes to its resistance to abrasion and tearing. This toughness, combined with its elongation properties, also results in outstanding flexibility and impact resistance. ELASTUFF 120 is a solventless system enabling fast, high-build coats without solvent entrapment. We supply it in a roller-grade version.
Typical applications include wood decks (boat and home), wood boat hulls, fiberglass deck and hull surfaces, wood or concrete steps, walkways, lanais, swimming pools, pool decks, tennis courts, parking areas, garage floors and concrete top surfaces.
The vertical hold attained by ELASTUFF 120 gives it the ability to uniformly cover coarse or pitted wood, concrete and other irregular surfaces.
All surfaces 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.
Wood: ELASTUFF 120 can be applied directly to clean new wood. To additionally protect the wood, one or more coats of CPES (Clear Penetrating Epoxy Sealer) can be applied first, including all seams and edges, and allowed to cure. All cracks larger than hairline should be considered as "moving" and be cleaned and filled with either 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 ELASTUFF 120 are required on top of the primed or unprimed surface. Each additional coat should be applied perpendicular to the original coating.
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 ELASTUFF 120 are required on top of the primed surface. Each additional coat should be applied perpendicular to the original coating.
Fiberglass: Fiberglass should be scuffed and cleaned with M.E.K. before ELASTUFF 120 is applied. The surface should be primed with CPES (Clear Penetrating Epoxy Sealer). At least 24 hours should pass between the application of the primer and the application of ELASTUFF 120. At least 2 generous coatings of ELASTUFF 120 are required on top of the primed surface. Each additional coat should be applied perpendicular to the original coating.
Concrete: Concrete which will be subject to immersion conditions must be blast cleaned. Concrete subject to non-immersion conditions can either be blast cleaned to roughen the surface or acid etched, so long as the etching provides an even profile of 5 to 8 mils. The surface preparation must remove all loose, weak or powdery concrete to expose all voids and provide the necessary profile for mechanical adhesion of the ELASTUFF 120.
Concrete surfaces which are contaminated with oil, grease, dirt, chemicals, etc. should be cleaned prior to blasting or acid etching with a biodegradable chemical cleaner and water. Cleaning should be accomplished using mechanical scrubbers and/or high pressure power washing equipment. Rinse thoroughly to remove all traces of the cleaner.
Acid etching should be done with a 10% Muriatic acid solution. The solution should be sprinkled onto the concrete surface. After the solution has stopped bubbling or foaming (normally 5 to 10 minutes) the area should be scrubbed thoroughly by hand or by using mechanical scrubbers. After scrubbing, all surfaces should be thoroughly rinsed with liberal amounts of fresh water to assure complete acid removal. Surfaces may require additional rinsing or a high pressure rinse to remove all traces of the acid solution.
Any resurfacing or repairs necessary to achieve a sound, consistent surface, free of bugholes, voids, cracks or spalling shall be completed prior to priming. After repairs are completed and adequately cured, concrete surfaces should be primed with one (1) coat of CPES (Clear Penetrating Epoxy Sealer) or UNISEAL epoxy sealer. Sealer shall be applied by roller, brush or airless spray at the rate of 250 sq. ft. per gallon (6 sq. meters/liter). Allow a minimum of 1 hour dry time at 75°F (24°C) between application of CPES or UNISEAL and the application of ELASTUFF 120. Colder temperatures will require additional dry time. The sealed surface should be topcoated within 24 hours and should under no circumstances be left exposed longer than 48 hours.
Asphalt: All asphalt shall be allowed to age a minimum of 60 days prior to the application of Elastuff 120. 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 Elastuff 120 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.
ELASTUFF 120 applied at the coverage rate of one gallon per 100 sq. ft. (2.5 sq. meters/liter) of the combined Part A and Part B will theoretically yield 16.0 dry mils (406 dry microns)*. The following dry mil thicknesses* are provided for guideline use only for typical applications:
*The theoretical mil thickness given for coverage per gallon is based on smooth, nonporous surfaces. Actual gallons required to achieve the minimum dry mil film thickness will depend upon the surface texture, ambient weather conditions and technique of the applicator.
Packing & Mixing
Shelf Life and Storage
ELASTUFF 120 components are affected by moisture prior to catalyzation and must be protected from moisture contamination. Keep all containers tightly closed during storage. Unopened containers are factory sealed with an inert gas to prevent contamination. After opening and if all components are not to be used, containers should be tightly sealed to protect components from moisture contamination. Storage under these conditions should not exceed 3 weeks, although this may vary depending on the amount stored and the ambient atmospheric conditions when the containers are closed.Precautions
Use only in a well ventilated area. If used indoors, provide mechanical exhaust ventalation. Avoid contact with eyes and contact with skin. Avoid breathing of vapor or spray mist. Use approved (MSHA/OSHA) chemical cartridge respirator with particulate filter.
WARNING: Elastuff 120 uses an isocyanate catalyst. While no exposure limits have yet been set, NIOSH recommends the use of a N95 or better particulate pre-filter, particularly if used in enclosed environments. Our prefilters are N95 rated.
Elastuff 120 is a hazardous product. Check the shipping options on the order form for details on shipping hazardous items. For additional information refer to the Elastuff 120 Material Safety Data Sheet.
The Rot Doctor, Inc.
P.O. Box 30612 • Seattle, WA 98113
Voice: 206.364.2155 • Fax: 206.364.4744
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