NAUTIC FILL4 is a polymer composite for professional use in yacht and boat building. It is intended for the filling of difficult accessible spaces in laminate structures. The product has good adhesion to polyester fibre glass laminate. The product can be cured with BPO - benzoyl peroxide or MEKP – methyl ethyl ketone peroxide; however, it is very important to pay attention to the difference in potlife due to the kind of hardener used.