Gel Mediums offer many ways to build texture. They can be used to create glazes, extend paint and change finishes. Gels are essentially colorless paint, as they utilize the same 100% acrylic polymers as acrylic paint. Gels are also excellent adhesives for collage and mixed media, they dry with excellent flexibility with chemical, water and UV resistance. Extra Heavy Gels have the thickest consistency of any gel we offer and may be blended with colors to increase body. Excellent for holding peaks and tool marks.. Matte finish.