Brick 600 Heat Transfer Vinyl. Our thickest heat transfer vinyl, now easier to cut and apply. Thin or thick materials, of all sizes have a place in garment decoration! Siser Brick 600 is a 600 micron thick flexible heat transfer vinyl that is designed for smaller logos and designs to add extra dimension to your garments. The matte finish of Brick 600 looks great on caps, bags, and is ideal for left chest logos. Next time you feel like your design is too flat, consider giving it some dimension with Siser Brick 600. Brick 600 can be cut with laser systems.