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F-974 Muraculon Absorber Coat is a NON- halogenated vinyl based coating used to seal polyurethane foam used for pyramidal absorbers used in anechoic chambers.

F-974 Muraculon Absorber Coat will provide a flexible protective coating on polyurethane foam to create a barrier to moisture, dirt, UV, abrasion, impact, puncture and chemicals. This tough yet flexible coating adds durability and color to absorber foam and doesn’t crack when flexed.
Unit of Measure

Technical Specs

Brands

N/A Performix®

Solids Weight

N/A 35+ %

Temperature Use Range

N/A -0 to 200 ºF

Block Resistance at 140 Degree Fahrenheit (ºF) Temperature

N/A 4 h

Coverage

N/A 150 ft²/gal at 5 mils

Tensile Test Method

N/A American Society for Testing and Materials (ASTM D-412)

Elongation Test Method

N/A American Society for Testing and Materials (ASTM D-412)

Shelf Life

N/A 1+ years at 77 ºF unopened container

Finish

N/A Matte

Chemical Resistance

N/A Mineral Oil: Very Good
Machine Oil: Very Good
Saline: Very Good
Blood: Very Good
Urea (6% in H2O): Very Good
All-purpose cleaner: Very Good
Betadine (Iodine): (Stained after 5 minutes.) Good
Acid (10% sulfuric in H2O): Very Good
Gasoline: Good
Alcohol: Very Good

In House Test Results (ASTM D1308)

Alternative Products

N/A Contact Technical Service

Other Features Include

Other Features Include

N/A Remains flexible
Wide selection of colors.
Single component - no catalyst.
Non-Halogenated FR system
Super fast dry/processing
FR: Passes NRL requirements
Meets or exceeds UL94 HBF

Surface Preparations

N/A All surfaces to be coated must be free of any oils, dust or loose foam particles.

USE ADEQUATE VENTILATION.

Mixing Instructions

N/A Like most liquid vinyl coatings, F-974 will coagulate [thicken] during storage, requiring thorough remixing before use each day. For best results, a high speed air/explosion proof electric hand or drum mixer along with a Cowles® or dispersion blade gives the maximum combination of high shear, excellent flow and circulation. Dispersion blade diameters of 3" minimum for mixing five gallon containers and 7" minimum for mixing 50 gallon drums are required. Note: It has been found that the dispersion blades are highly effective, fast and produce more shearing action than can be obtained from a standard mixing blade or paddle blade. It is very important that you check liquid temperature of the F-974 and ensure it is at a minimum of 68 F.
After the F-974 has been properly sheer mixed each day before starting production it is only necessary to provide constant low speed agitation throughout the day to minimize any soft settling which may occur.
Avoid making solvent additions before proper sheer mixing is completed. Check viscosity.
Some adjustments may be necessary for your particular use. Contact technical service for specific applications.

Spraying

N/A Set pot pressure at 20-25psi and atomizing at 40-80psi, open pattern adjustment for 4"- 6" pattern at 8"-12" from surface. Aim spray gun at foam and fully trigger spray gun. Adjust material until a uniform pattern appears on the foam.
Each spray pass should be applied "damp" and typically 3-4 spray passes will sufficiently coat/seal and color the foam if applied properly. This process can be done as individual spray passes and allowed to dry between coats or can be applied consecutively to suit your production needs.

Applying F-974 too heavy or wet will result in excessive absorption into the foam and prevent the foam from sealing easily.

Applying F-974 too lightly or dry will result in lack of adhesion and proper film build for durability.

Recommended Equipment and Settings

N/A Binks® model 2100 gun
Nozzle: 66SS
Cap: 66SD
Needle: 565
Material: 25psi
Atomization: 30-50psi
Dilution: none required
Clean up: Acetone and Methyl Ethyl Ketone

Hints

N/A Always mix before spraying. Avoid excessive air movement, heat or humidity. Always use proper ventilation and protection.

Note

N/A For Industrial Use Only.

We cannot anticipate all conditions under which this information and our products, or the products of other manufacturers in combination with our products, may be used. We accept no responsibility for results obtained by the applications of this information or the safety and suitability of our products, either alone or in combination with other product combination for their own purposes. Unless otherwise agreed in writing, we sell the products without warranty, and buyers and users assume all responsibility and liability for loss or damage arising from the handling and use of our products whether used alone or in combination with other products. Ever changing V.O.C. regulations in your area may require you to contact local authorities for proper use and/or disposal of this product. Should you need further assistance, please contact PLAST DIP INTERNATIONAL technical service.

PDC is a registered trademark of PLASTI DIP INTERNATIONAL
Performix and logo are trademarks of PLASTI DIP INTERNATIONAL
Cowles is a registered trademark of Morehouse-COWLES, Inc.
BINKS is a registered trademark of BINKS MFG. CO., Franklin Park, IL

To accelerate final drying, place coated object in ventilated oven at 100ºF - 140ºF for 5 minutes. Make sure heat source is safe for this use and that you ventilate properly. To increase coating speed, you may increase atomizing pressure; open material adjustment and pattern adjustment to your comfort level.