Technical Specifications

TECHNICAL DATA
WRT-04
ZINSSER
®
WATERTITE
®
FLEXIBLE PRIMER & FINISH
1
Form: GDH-54
Rev.: 031320
DESCRIPTION AND USES
Zinsser
®
WaterTite
®
Flexible Primer & Finish is a high build,
moisture and mildew resistant, low VOC coating designed
with elastomeric qualities to expand and contract to fill
hairline cracks (1/16” or less) in vertical concrete and
masonry surfaces. These products are suitable for stucco,
brick, tilt-up walls, pre-cast or poured-in-place concrete as
well as CMU and cement block. Flexible Primer & Finish
provides excellent resistance to high alkali surfaces (pH
levels up to 13.8). These coatings can be applied to new
properly cast concrete and stucco within 72 hours. They
block efflorescence (salt build-up) from passing through the
topcoat and will not degrade when applied to concrete
surfaces with a pH of up to 13.8.
Durable and weather resistant, WaterTite Flexible Primer &
Finish passes the ASTM D6904-03 Standard Practice for
Resistance to Wind Driven Rain for Exterior Coatings
Applied on Masonry. Based on ASTM 1737-85 & D522
Method of Test for Elongation Testing, Flexible Primer &
Finish can stretch up to 160% and does not yellow or chalk.
Additionally, based on ASTM 1653 Method of Water
Permeability, Flexible Primer & Finish has a perm rating of
15.5. This product can be used as a primer or primer and
topcoat. If used as a primer, it should be topcoated with a
high quality oil or latex-base finish.
MPI #10 Certified (Refer to the MPI website for the most
current listing of MPI certified products.)
PERFORMANCE CHARACTERISTICS
 Designed with elastomeric qualities
 Protects from wind driven rain
 Mildew resistant finish
 Withstand high pH up to 13.8
 Blocks efflorescence, does not chalk or yellow
 Tintable
 Low VOC
PRODUCTS
SKU
DESCRIPTION
5061
1 Gallon (White Tint Base)
5063
5 Gallon (White Tint Base)
269342
1 Gallon (Deep Tint Base)
269343
5 Gallon (Deep Tint Base)
PRODUCT APPLICATION
SURFACE PREPARATION
Surfaces must be clean, dry, and sound. New concrete must
cure for at least 3 days prior to coating. Surfaces must be
free of dirt, efflorescence, mold, algae, sandy mortar, release
agents or any material that could compromise the coating
adhesion. Splash water on the surface to test for the
presence of form sealers or release agents. If the surface
turns dark, WaterTite Flexible Primer & Finish can be
applied. If the water beads up or does not turn dark, the
surface must be chemically or mechanically cleaned and
retested before proceeding. Wash, vacuum, scrape, wire
brush, power wash or mechanically abrade to clean the
surface.
Cast concrete, concrete block and mortar joints must be
hard and firm, not loose, sandy or soft. Scrape the surface
with a flat screwdriver to test for soundness. If soft or sandy,
contact a professional contractor before proceeding. Use
mechanical means (hand or power tools) to open holes (bug-
holes) caused by air bubbles in cast-in-place concrete to
allow coating to fully penetrate. Replace missing mortar and
fill non-dynamic cracks and bug-holes deeper than 1/16” with
WaterTite Hydraulic Cement or equivalent product.
WaterTite Hydraulic Cement must be fully dry before
painting can begin. Follow the manufacturer’s recommended
dry time guidelines. Flexible Primer & Finish can be applied
over previously painted surfaces. However, waterproofing
ability is dependent upon the integrity and moisture
resistance of the previous coating.
WARNING! If you scrape, sand or remove old paint, you
may release lead dust. LEAD IS TOXIC. EXPOSURE TO
LEAD DUST CAN CAUSE SERIOUS ILLNESS, SUCH AS
BRAIN DAMAGE, ESPECIALLY IN CHILDREN.
PREGNANT WOMEN SHOULD ALSO AVOID EXPOSURE.
Wear a NIOSH-Approved respirator to control lead
exposure. Clean up carefully with a HEPA vacuum and a wet
mop. Before you start, find out how to protect yourself and
your family by contacting the National Lead Information
Hotline at 1-800-424-LEAD or log on to www.epa.gov/lead.