How to Guide

EPOXY TECHNICAL DATA SP-21
S71 WATER-BASED EPOXY PRIMER
Form: GDH-985
Rev.: 102915
1
.DESCRIPTION .
The S71 Water-Based Epoxy Primer is formulated for
spray application. It is a zero VOC, zero HAP, very low
odor, two component, water-based epoxy primer.
This water based epoxy primer is designed for adhesion
and corrosion resistance, and for general maintenance
use in moderate industrial environments for the corrosion
protection of equipment and other steel surfaces. This
coating is not suitable for continuous water immersion
service. Since this coating is very low odor during
application, it is ideal for use in warehouses, schools,
healthcare facilities, food service areas, office buildings,
hotels or in any area where odors are an issue.
This product is intended for application by spray. Use S70
Water-based Epoxy primer for application by brush or
roller.
Sierra S71 complies with USDA FSIS regulatory sanitation
performance standards for food establishment facilities.
This coating is impervious to moisture and easily cleaned
and sanitized.
.APPEARANCE .
Flat gray finish
.PRODUCTS .
1-Gallon 5-Gallon Description
208113 208114* Gray
208112 208559* Activator
* Made-To-Order only. Contact Rust-Oleum Customer
Service for details.
.COMPANION PRODUCTS .
RECOMMENDED TOPCOAT
S60 Epoxy Maintenance Coating
COMPATIBLE TOPCOAT
S37 MetalMax
®
S39 Beyond™
.PRODUCT APPLICATION .
SURFACE PREPARATION
ALL SURFACES: Remove all dirt, grease, oil, salt and
chemical contaminants by washing the surface with
Industrial Pure Strength 3599 Cleaner/Degreaser
®
,
commercial detergent or other suitable cleaner. Rinse
thoroughly with fresh water and allow to fully dry.
.PRODUCT APPLICATION .
STEEL: Scrape and wire brush or power tool clean to
remove loose rust, scale, and deteriorated coatings.
Abrasive blast to a minimum Commercial Grade (SSPC-
SP-6, NACE 3) for more severe exposures. Two coats of
primer must be used on abrasive blasted surfaces.
PREVIOUSLY COATED: Previously coated surfaces must
be sound and in good condition. Smooth, hard, or glossy
finishes should be scarified by sanding to create a surface
profile. The S70 Epoxy Primer is compatible with most
coatings, but a test patch is suggested.
MIXING
Premix the base component to re-disperse settled pigment
before adding the activator. Add in the activator and
thoroughly mix for 3-5 minutes.
APPLICATION
Apply only when air and surface temperatures are
between 50-100°F (10-38°C) and surface temperature is
at least 5°F above dew point. Ensure fresh air entry during
application and drying.
EQUIPMENT RECOMMENDATIONS
AIR-ATOMIZED SPRAY:
Method Fluid Tip Fluid Delivery Atomizing
Pressure
Pressure 0.055-0.070 12-16 oz./min. 40-60 psi
Siphon 0.055-0.070 — —
HVLP (var.) 0.043-0.070 8-10 oz./min. 10 psi at tip
THINNING
AIR ATOMIZED SPRAY: Thin as required up to 5% with
fresh water.
DRY & RECOAT
Dry and recoat times are based on 70°F (21°C) and 50%
relative humidity. Dries to tack-free in 30 minutes and can
be recoated in 1-2 hours. If the curing time exceeds 72
hours, the surface must be scarified by sanding or other
method prior to application of an additional coat or other
finish coat.
CLEAN-UP
Clean up with soap and water and dispose of all waste
material in a proper manner and in accordance with local
waste regulations. Consult with local environmental
regulations for appropriate method of disposal and/or
recycling of paint and empty container.