Shop Home / Accessories / power tools Resistant Assistant 120ml CODE: 17050049 power tools Resistant Assistant 120ml Product Details: It’s a three-minute pre-softener that deposits hair colour quicker on super resistant hairlines, trouble spots and whole resistant heads. TRA can be used with any manufacturers, colour/chemical lines and is perfect with permanent, semi-permanent, demi-permanent colour. TRA can also be applied before wrapping perms to soften resistant areas. TRA on coarse hair prior to straightening to help breakdown the curl/wave faster. TRA works in combination with all POWERTOOLS products. To see pricing and the ability to order online, please login using your Salon ID.