Hey Scott - not sure - my old boss at the bodyshop swears by it - that doesn't make it a complete truth - he said to lay this down before any other primers or sealers / light coat of Vari-prime on all 'bare metal' - standard procedure at his shop - and his shop is one of the best - I'm asking him if it's 'before' you apply any filler or "after" - he said that after it's applied to the metal - you can build up all kinds of primer coats and sand after that "till my little hearts content"..... his condescending words - I was a wet sanding maniac back in the day -
VARIPRIME
® 625S™
SELF-ETCHING PRIMER
Copyright © 2007 DuPont. All rights reserved. The DuPont Oval Logo, DuPont™, The miracles of science™ and all trademarks listed herein
with ® or ™ are trademarks or registered trademarks of E.I. du Pont de Nemours and Company or its affiliates.
A DuPont OEM / Commercial Finishes Product
TYPE
Lead- and chromate-free, self-etching, non-sanding primer.
DESCRIPTION
Variprime
® 625S™ is a versatile product developed with self-etching
properties that allow it to be used over a variety of substrates, as well
as cured enamel topcoats. Variprime
® 625S™ delivers excellent
adhesion and superior corrosion resistance. It gets mixed 1:1 with
Variprime
® 614S™, Variprime® 616S™ or Variprime® 620S™ Converter
and does not require an induction period.
SUGGESTED USES
For use over properly prepared/cleaned substrates. Wash surface
with a mild detergent. Sand/featheredge substrate with P180 DA,
followed by P240 DA. Clean and degrease substrate to remove
contaminants.
NOT RECOMMENDED FOR
Immersion service
COMPATIBILITY WITH OTHER COATINGS
Can be used under all DuPont primer systems. For
optimum topcoat appearance, seal prior to
topcoating.
DRY FILM CHARACTERISTICS
Chemical Resistance VERY GOOD,
with appropriate topcoat
Humidity Resistance EXCELLENT
Weatherability EXCELLENT,
with appropriate topcoat
MAXIMUM SERVICE TEMPERATURE
150°F (65°C) in continuous or intermittent service
VOLUME SOLIDS
25.1% unactivated
12.9% RTS mixed 1:1 with Variprime® 616S™
WEIGHT SOLIDS
45.5% unactivated
23.6% RTS mixed 1:1 with Variprime® 616S™
WEIGHT PER GALLON
9.65 lbs/gal unactivated
SUGGESTED FILM THICKNESS
0.8– 1.2 mils dry film thickness
THEORETICAL COVERAGE PER GALLON
403 sq. ft./gal @ 1 mil DFT unactivated
207 sq. ft./gal @ 1 mil DFT mixed 1:1 with Variprime® 616S™
GLOSS
Flat
COLOR
Green-gray
FLASH POINT (CLOSED CUP)
Between 20- 73°F (-7 to 23°C)
SHELF LIFE
12 months minimum
APPLICATION SOLVENTS
None required. Up to 5% DuPont 8100S™ Acrylic Enamel
Retarder may be used in hot weather.
CLEANUP SOLVENTS
DuPont 3602S™ Thinner
ACTIVATION (MIX RATIO)
Mix 1 part Variprime
® 625S™ with one part Variprime® 614S™ Slow,
Variprime
® 616S™ Mid-temp or Variprime® 620S™ Fast Converter.
Mix thoroughly.
INDUCTION TIME
No induction time is required.
POT LIFE
3 days at 70°F (21°C)
ADDITIONAL COMMENTS
Allow 30 minutes flash prior to applying primer.
This product does not comply with Rule 66 (photochemically
reactive)
Variprime® is a non-sanding primer. However, if left to dry for
24 hours or more, sanding is required.
APPLICATION CONDITIONS
Do not apply if material, substrate or ambient temperature is less
than 50°F (10°C) or above 110°F (43°C). The substrate must be at
least 5°F (3°C) above the dew point. Relative humidity should be
below