Escoat RA-70A


Escoat RA-70A Release Coat is a non-silicone product especially suited for printers of pressure sensitive labels, film, tapes including polypropylene, polyethylene, and polyester where appropriate release is needed.  Escoat RA-70A Release Coat can be supplied in various solids concentrations and are ready for use without additional dilution or additives.

Material Description:            Release Coat Varnish

Chemical Name:                    Polyvinyl Stearyl Carbamate (PVSC)

 Heptane Blend

Empirical Formula:               (PVSC)                                   [CH2-CH(OCONHC18H37)-]n

                                                Heptane Blend                        C7H16

CAS #:                                    (PVSC)                                   36671-85-9                             

Heptane Blend                       142-82-5

Molecular Weight:                (PVSC)                                   [339]n   or 110,000 –135,000              

Heptane Blend                        100.2

Physical Properties:            Appearance:                           Clear to amber in color liquid [gel at low temps]

Odor:                                       Hydrocarbon odor

Concentration:                         RA-70A: 1.5% solids

Solvent                                    Heptane Blend

Flash Point:                             25º F (-4º C) (Closed Cup)

Application Instructions:

  • Temperature of Escoat RA-70A Release Coat should be at least 90°F to preclude gel formation.
  • Mix well. Heat and mix until no residue is present. A milky waxy material will settle out if Escoat RA-70A Release Coat is stored at temperatures significantly below 90°F.
  • Recirculate Escoat RA-70A Release Coat from a heated, large container (5 gallon). The entire system must be warm including analox roller and reservoir before applying.
  • For initial trial runs, operate at very slow speeds. It’s important to completely dry ink and release coat. Rewind rolls, allow rolls to temperature stabilize for 3-4 hours. Then unwind. Check for adhesive pick-off and tack of adhesive.

Printing: Polypropylene, Polyester, & Polyethylene films:

Tapes coated with acrylic adhesives may have release coat on nonadhesive side. Solvent rubber and hot melt adhesive coated tape will have release coat.

Printing Sequence: 

Tapes with no release coat, printing procedure is as follows: Corona treatment -> print -> dry -> release coat -> dry

Tapes with release coat, printing procedure is as follows: Corona treatment or Primer -> dry -> print -> dry -> release coat -> dry

Release coat should be applied out of a heated recirculating system. Since the Heptane blend can be corrosive to the printing plates commonly used with flexographic printing, choose plates that are
solvent resistant.


This product is a flammable liquid. Store in sealed containers in approved flammable storage areas. Avoid open flame, sparks, and high heat during use. Do not breathe vapors.

Toxicity & Safety: 

This material is not intended for use in products for which prolonged contact with mucous membranes or abraded skin, or implantation within the human body is specially intended, unless the finished product has been tested in accordance with the Food and Drug Administration and/or other applicable safety testing requirements. Because of wide range of such potential uses, Mayzo, Inc. is not able to recommend this material as safe and effective for such uses and assumes no liability for any such uses. Read and understand the Material Safety Data Sheet before using or handling this product.

FDA Regulations: 

This product has not been tested for clearance by the FDA for use as an indirect food additive in food packaging and/or other applications. Contact your Mayzo representative if FDA clearance is needed.

Downloadable Product Details:  Please view our Escoat RA 70A PDF