Lancer Group’s STI7940 Stretch Clear is a first-down silicone clear that when printed first on PET film provides excellent durability and washfastness on performance-wear garments decorated with silicone heat transfers. STI7940 is recommended for transfers made with STI7960 White and STI7933 RFU colours. This step can be eliminated when producing high-density silicone transfers.

STI7940 is part of the STI Silicone Heat Transfer System. Other components in this system that are necessary to produce silicone heat transfers are PET Film, STI7960 White, STI7933 Colours, STI7941 Stretch Underbase, and T-1 Adhesive Powder. Note: All components STI7902 and T-1 Powder must be catalyzed prior to printing.


Ideal Fabric— 100% Polyester Performance wear fabrics.

Mesh–83-125/inch (32T-48Tcm) High Density Inks – 83-125/inch (43T-48Tcm)

Squegee–70 durometer or 70/90/70 Triple Durometer.

Stencil–Any PVC-free or phthalate-free emulsion compatible with plastisol inks.

Curing–250-290F (125-147C) for 1.5 to 2 minutes.

Additives–Viscosity Reducer 3-4% by weight maximum

Storage–30C/84F in tightly closed containers

Cleaning–Enviro Series TR Blend or Mineral Spirits


Always test finished prints for curing, adhesion, opacity, bleed-resistance and desired look prior to beginning full production runs. Lancer Group International cannot guarantee the results or back claims that this ink will test PVC-free or phthalate-free if any additive other than an additive manufactured by Lancer Group International is used to modify this ink. Test results by a third-party laboratory verifying all components used to produce this ink are PVC-free, phthalate-free and lead-free are available upon request.