Preparation: Architectural wood surfaces should be sanded with a minimum of 80-grit, low stearate content aluminum oxide sandpaper to remove mill glaze and any excess material. The final sanding schedule should be reviewed based on the desired final finish. A maximum of 320-grit is suggested.
For application to ferrous metals it is necessary to apply an anti-rust primer such as
Tremclad Water Based Rust Primer prior to application of EM9300.
Surface must be clean, dry and free of any contamination by moisture, grease, oil or dirt. Remove contamination with denatured alcohol and water mixed in equal parts. If heavy grease or oil is evident use a biodegradable wood cleaner to remove the contamination, then follow up with water/alcohol wash down. Wood substrates should be kiln dried and not exceed 10% moisture content
Application: The EM9300 Waterborne Polycabonate Urethane can be applied by brush, roller or spray method. Back brushing with a poly-bristle brush is recommended for applications onto substrates rougher than 180-grit sanding schedule to ensure even surface penetration and film formation. Product may also be applied with a lint free roller and then back brushed into the substrate. Spray methods include Conventional, HVLP, Air-Assisted Airless & Airless sprayers. Consult with your spray equipment manufacturer to determine the appropriate gun set and air pressures based on coating viscosity and intended use.
A minimum of 4 coats of EM9300 Waterborne Polycabonate Urethane should be applied to obtain a durable film formation. All coats should be applied at 3-4 mils wet per coat on a (rough) wood substrate sanded 80g. Each coat should be allowed to dry completely for 1 hour @ 20C before recoating. Application temperatures must be above 10C° and relative humidity below 80%. Do not apply coating to substrates where the moisture content is over 10%. Excess moisture may cause film clouding, adhesion problems and premature film failure. Do not apply coating to exposed areas when rain is forecast or imminent within 24 hours.
Target Coatings EM9300 Waterborne Polycabonate Urethane can be tinted with water-soluble universal colorant and water-soluble dyes. Test each tinting method to ensure proper film formation and adhesion prior to commencing with the entire project.
- Synthetic bristles paintbrush
- Roller applicator
- Spray gun :
- Compressed Air HVLP: 1.3mm – 1.5mm needle
- Air-Assisted Airless: .09 - .11 tip set.
- Airless: Fine tip set.
Number of coats: Minimum 4 coats
Drying time: To the touch : 25 minutes / Between coats : 1 hour
Use only in well ventilated areas. Avoid inhaling spray mist. Wear a NIOSH/WMSHA approved respirator during spray applications.