Home / Arts & Crafts / Glue / Hi-Tack Fabric Stiffener - HT1600 Hi-Tack Fabric Stiffener - HT1600 £7.98 Stock Status: In Stock Information Hi-Tack Fabric Stiffener 250ml HT1600. Suitable for most fabrics. Easy to use, safe and non-toxic. Permanently stiffens fabrics and has a built in sheen. Suitable for most synthetic and natural materials and can be diluted with water. Stiffens according to strength of mixture. Ideal for blind making. Apply either by brush or dipping.