We will refund any overcharge in shipping costs that is calculated by our website.
Ins-Tuff Rigidizer **This product ships via FedEx ONLY.
**Freezing makes this product useless. Please be aware that during the winter months there is a possibility of Ins-Tuff Rigidizer freezing in transit to you. We now ship this product in an insulated bag to try and prevent freezing.
- One Quart Ins-Tuff for Inswool/Kaowool insulating blanket.
- This product stiffens the insulating blanket and reduces airborn fibers during use.
- If using in a forge or foundry a 'top coat' of refractory is recommended.
- This product makes applying top coat products like Satanite or Greenpatch 421 easier.
- Coverage: approximately 12.5 square feet with a single brushed coat per quart
- Manufactured by Harbison Walker