TT-P-645 Primer, Paint, Zinc-Molybdate, Alkyd Type

The TT-P-645 specification covers an anticorrosive paint for general purpose applications to steel and aluminum. The paint contains a maximum of 250 grams of volatile organic compounds (VOC) per liter (2.08 pounds of VOC per gallon). This paint is to be used as supplied with no thinning.

SKU: 645. Category: . Tags: , , .

Product Description

The TT-P-645 specification covers a 2.8 pound per gallon (340 gram/ liter) volatile organic content (VOC) complying, zinc-molybdate paint for use as a general primer for application to steel and aluminum.

TT-P-645B Zinc Molybdate Primer is a single component, zinc-molybdate pigmented primer primarily intended for use as a general primer for steel and properly prepared aluminum.

PROPERTIES:

SOLIDS (Weight)…………………….. 78.8%
Minimum SOLIDS (Volume)……………………….56%
Minimum WEIGHT / GALLON………………….. 13.3–13.7 lbs
COLORS………………………….. Yellow or Green
THINNER……………………… MIL-T-81772B TY.III
SHELF LIFE………………………………. 1 Year

DRYING TIME:

TO TOUCH…………………………. Within 6 Hours
TO RECOAT…………………………….. 6-8 Hours
TO CURE………………………………… 14 Days

ADVANTAGES:

(1). Corrosion Inhibiting
(2). High Solids, Low VOC
(3). Fast Dry
(4). Use on ferrous and non-ferrous metals
(5). Meets Government Specification TT-P-645B
(6). Meets AMS 3117 Specification

Click On The Links Below To View Documents:

Military Performance Specification TT-P-645

TDS – TT-P-645B

AMS-3117, AMS3117

SURFACE PREPARATION: Steel, Non-Ferrous Metals & Galvanizing. Surface to be coated must be clean, dry, and free of all foreign contaminants including grease, oil, dirt and paint. Clean in accordance with SSPC-SP-1. Most metals should be sanded, except aluminum, which must have a base coat of pre-treatment wash primer MIL-C-8514C, followed by one wet coat of TT-P-645B. Alloys that oxidize must be lightly sanded to remove all loose material. Dirt and dust are best removed with a stiff bristle brush and by compressed air. For exterior use and non-ferrous metals, it is recommended that TT-P-645B be applied over pre-treatment coating conforming to MIL-C-8514C or DOD-P-15328D. Grease and oil should be removed by cleaning with appropriate solvents such as mineral spirits, lacquer wash thinner or xylene.

MIXING/APPLICATION INSTRUCTIONS: Apply by spray, or brush/roll small areas to deposit a hiding coat of primer. A wet coat is necessary to secure maximum adhesion and corrosion inhibiting properties. For application by spray, thin sparingly with Xylene per TT-X-916 or MIL-T-81772B TY.III only as need for proper atomization. For brush or roller, use at packaged viscosity.