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1.888.800.MESA
Surface Tolerant Liquid Epoxy
Description: Protal ST Epoxy Mastic is a two pack, high solids fast drying epoxy coating for application directly onto wire brushed rusty steel substrates to SSPC-SP2/3. Its good penetration and adhesive properties ensure excellent protection in long term exterior exposure.
Uses: Use wherever steel grit lasting is not possible. Protal ST Epoxy Mastic can be used alone or in combination with other topcoats for long term exposure to water in applications such as: structural steel, pipe externals, pipe racks, tanks, offshore platforms, locks, gates, and bridges.
· Minimal surface preparation (SSPC-SP2/3)
· Long term exterior protection
· Excellent water/sea water resistance
· Good resistance to acids and alkalis
· Good flexibility, hardness and adhesion
· Good impact resistance
· LowVOC’s
Prepare surfaces by removing all loose scale, rust or other foreign matter in accordance to SSPC-SP2 "Hand Tool Cleaning". High pressure water was of 3,000-7,000 psi is also suitable. This can be achieved using power brushing or machine grinding. If the surface is severely corroded, chipping hammers and needle guns will be required. The surface should finally be cleaned with a vacuum cleaner, clean dry with compressed air or a clean brush. The steel should then have a faint metallic sheen. Uses as supplied in pre-weighted packs Part A (base component) with Part B (hardener). Pour all of Part B into Part A and thoroughly mix with a power whip for at least 2 minutes.
The substrate temperature must be a minimum of 5°F (3°C) above the dew point temperature before proceeding with the coating operation. The first coat can then be applied by brush or spray to a wet thickness of 10 mils (8 mils DFT). Check the film thickness of the coating regularly with a wet film gauge during application. Minimum wait time for overcoating is 4 hours at 77°F (25°C)
Spraying is carried out using a 45:1 airless spray pump and a 21 to 31 thousands of an inch tip. Below 59°F (15°C) and 5% MEK. Apply the second coat at 10 mils wet film thickness in the same manner as the first. When dry, a final weather resistant top coat such as a water based acrylic or polyurethane can be applied by brush or spray.
