FLOOR COATINGS APPLICATIONS
PREPARATION AND HANDLING
Many High-Performance products are two component catalyzed or unique curing systems that demand strict adherence to all technical data and guidelines.
Below is a routine checklist of sound practices and procedures:
1) Before beginning, review all project specifications closely and read all technical data thoroughly.
2) Stage all materials before starting and double check that all the proper products, components, and quantities are on hand.
3) Make certain that all products are within the usable shelf-life dates.
4) Carefully follow all mixing instructions.
5) observe all mixing ratios, rates, and order of addition – i.e., Component B is added to Component A.
6) Provide efficient and thorough mixing of all products and allow for proper “sweat-in”or induction time.
7) Only mix enough material to be applied within the recommended working time or pot-life of the product.
8) Measure temperatures and make sure they are within allowable application ranges and note where cold or hot temperatures can slow or accelerate performance/application parameters.
9) If using thinners – only use recommended thinning agents.
10) Once the coatings are prepared make sure that the recommended application tools employed are high quality, clean and in good working condition.
APPLYING FLOOR COATING SYSTEMS METHODS:
Flooring system applications can be broadly grouped into two types; thin film (5-8 mls) and thick film (13-20 mls) systems.
Thin film applications are usually 2 coat systems; penetrating epoxy sealer/Pre-Prime and clear coats like moisture cure urethane finishes and lend themselves to brush, roll (3/8”nap max) and spray.
Thick film applications are normally 3 coat systems comprised of penetrating epoxy sealer/Pre-Prime, intermediate coat, and finish coat.
Tool requirements include brushes, squeegees and a variety of roller types; lambskin, phenolic core and porcupine.
Always refer to the technical data sheets for application recommendations for specific products and systems.
OPTIMAL 3 COAT – THICK FILM SYSTEM FIRST COAT – PENETRATING SEALER
The reaction of the epoxy sealer with the bare concrete performs a very important function of preventing “outgassing” with the subsequent topcoats.
Outgassing is a phenomenon where a liquid coating/topcoat reacts with unsealed concrete and gas is generated causing bubbles to form that become trapped in the finished film.The primer/sealer coat is poured or sprayed onto the floor and then evened out by brush, roller or squeegee.
All new or bare properly prepared concrete should receive a 100% solids epoxy Pre-Prime to provide a beginning foundation that forms a chemical bond within the concrete, satisfying the thirst and porosity of the substrate.
INTERMEDIATE AND FINISH COATS
Pour ribbons of the mixed coatings onto the floor then spread with squeegee, roller, lambswool applicator, or phenolic core roller. Lightly backroll with lint-free phenolic core roller perpendicular to the original squeegee orientation.
Avoid over rolling as it may cause appearance uniformity problems. Since many flooring systems are multilayer coats on large expansive areas, spiked shoes are routinely used by applicators so that they can walk into freshly coated areas to re-roll, even-out, lap, blend-in or broadcast aggregate or other materials into the finish while wet.
Porcupine rollers are used to smooth the surface coat and release entrapped air in the finish. Notched squeegees and rakes are used to apply high solids/ high build finishes at evenly controlled wet film thicknesses.
Hand broadcast aggregate to recommended profile approximately 2 lbs per 100 square feet up to one hour after application.
The Following items can effectively be addressed using the information provided in this article: