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F-874 Muraculon is a unique vinyl based coating that when spray applied provides a durable, flexible protective coating on polyurethane foams. F-874 can also be used on molded polyurethane and closed cell foam containing vinyl.

F-874 Muraculon will produce a skin/membrane on unskinned polyurethane foam to create a barrier to moisture and chemicals. This skin has excellent resistance to fluids and petroleums. F-874 is a tough coating that adds durability to foam and imparts abrasion as well as puncture resistance.

These qualities find particular use in the medical industry, where cushioning and positioning devices are fabricated and used in sterile environments, as well as therapeutic practices. Other uses include cushioning for athletic devices, seat cushions, packaging and acoustical panels. F-874 is an excellent, cost effective replacement for Hypalon® coating.
Unit of Measure

Technical Specs

Brands

N/A Performix®

Solids Weight

N/A 24 %

Temperature Use Range

N/A -0 to 200 ºF

Block Resistance at 140 Degree Fahrenheit (ºF) Temperature

N/A 4 h

Shelf Life

N/A 1+ years at 77 ºF unopened container

Finish

N/A Satin

Tensile

N/A 1,200+ psi

Tensile Test Method

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

Elongation

N/A 251 %

Elongation Test Method

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

Tear Resistance

N/A 0.125

Tear Resistance Test Method

N/A American Society for Testing and Materials (ASTM D-1004)

Coverage

N/A 80 ft²/gal at 5 mils

Chemical Resistance

N/A Mineral Oil: Very Good
Saline: Very Good
Urea (6% In H2O): Very Good
Betadine (Iodine): Very Good (Stained After 5 Minutes.)
Gasoline: Good
Machine Oil: Very Good
Blood: Very Good
All Purpose Cleaner: Very Good
Acid (10% Sulfuric In H2O): Very Good
Alcohol: Very Good

In House Test Results (ASTM D1308)

Alternative Products

N/A F-830

Other Features Include

N/A Wide selection of colors
Single component - no catalyst
Fast dry time.
Passes UL94 HBF
Does not cause artifacts in most imaging applications

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 QUALITY CONTROL RECOMMENDATIONS FOR SPRAY AND DIP APPLICATIONS.
Like most liquid vinyl, F-874 may coagulate [thicken] during storage, requiring thorough remixing agitation 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. Diameters of 3" for mixing five gallon containers and 7" for mixing 50 gallon drums. 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.
After the F-874 has been agitated thoroughly, it should last 8 to 10 hours depending on spray equipment and temperature. Avoid making solvent additions before mixing. Check viscosity Some adjustments may be necessary for your particular use. Contact technical service for specific applications.

Prime coat: Set pot pressure at 20-25psi and atomizing at 30-50psi, open pattern adjustment for a 2"- 4" pattern at 6”-10" from surface. Aim spray gun at foam and fully trigger spray gun. Open material adjustment until a uniform, wet splatter appears on the foam. The wet splatter should melt or flow into the surface of the foam. Coat all sides (except bottom) with an overlapping motion. Make sure all corners and edges are thoroughly primed. The prime coat should be wet to the touch but should not completely color or cover the foam. Its purpose is to wet or prime the surface for the sealing coat, a necessity for proper adhesion.

Seal coat: After the prime coat has been applied, immediately begin sealing the foam by only partially pulling the trigger back from its previous setting until a dry, web coating appears. This seal coat should appear lighter in color than the prime coat. Hold gun approximately 6"-10" from surface and use an overlapping motion, being sure to completely seal the surface. If seal coat is applied too dry, poor adhesion will result. If applied too wet, sealing surface may become difficult. Again, seal all sides (except bottom), being sure to check entire surface for complete seal.

Finish coat: After seal coat has been applied, immediately begin applying the finish coat by fully triggering spray gun as in prime coat. Holding the gun 6"-10" from surface, apply a uniform splatter coat using an overlapping motion. Apply the finish coat as desired in thickness and texture. The finish coat is necessary to increase seal coat strength and durability. Allow the finished coated part to dry to the touch (see caution), minimum 5 minutes, then return to prime coat, seal coat, and finish coat bottom of part. Follow instructions and be sure to pay close attention to corners and edges on all steps

Recommended Equipment and Settings

N/A Binks® model 2100 gun
Nozzle: 66SS
Cap: 66SD
Needle: 565
Material: 25 psi
Atomization: 30-50 psi
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 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.

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 PLASTI 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