HM375 HotMask
Polyester Transfer Tape for Heat Pressing

HM375 HotMask self wound film consists of a 3 mil (75 micron) polyster PET film coated with a high tack, heat resistant pressure sensitive modified acrylic adhesive. RTape's HotMask series of self wound polyester transfer tapes are designed to protect printed heat transfer material from the high temperatures of heat pressing. Available in different tack levels, HotMask transfers print and cut graphics from the carrier film and aids alignment of the graphic to the garment.

Tech Data Sheet

Physical Specifications
Adhesive 9.8 oz/in (1.073 N/cm)
Caliper facestock 3 mil. (75 microns)
Caliper facestock + adhesive 4 mil (100 microns)
Release Liner
Adhesion to Steel*
Tensile 30kpsi MD
Elongation 170% at break
Tear Resistance
Light Transmission [3mm thick]
Gloss (60 degree angle)
Chemical Resistance
Shelf Life** 1 year (70 degrees/50% RH) - store in original packaging
Base {tag_base}
Caliper (basestock)
Basis Weight
Gloss (75 degree angle)
BEKK Smoothness
Taber Stiffness
Temperature Limit (F)
Temperature Limit (C)
Chemical Resistance (Water)
Chemical Resistance (10% Nacl)
Chemical Resistance (38% H2S04)
Chemical Resistance (Ethanol)
Chemical Resistance (Aceton)
Surface pH
Surface Energy

Minimizes heat damage and other production losses. During the heat process, the HotMask protects the surface of the heat transfer material from heat related discoloring or any other damage.

Withstands long heat cycles. The polyester (PET) film of the HotMask withstands heat cycles as long as 60 seconds at 166 degrees C (330 degrees F)

No time wasted cleaning adhesive residue. After the heat transfer, HotMask removes easily without any adhesive residue. For best results, remove the HotMask while it is still warn.

Application Information

Transfer Tape



Flocking material
Polyurethane films
Vinyl films

Printer Profiles

Printer profiles are available on


Tapes are only warranted to be free of defect in workmanship or materials at time of shipment. Manufacturer will replace or credit any material manufacturer deems defective. No acceptance or responsibility for loss, damage, or expense, implies or otherwise, shall be assumed by seller or manufacturer. User assumes all risk and liability herewith.