Humbrol AC5708 Clearfix 28ml Bottle £3.70 Quantity: at £3.70 each Add To Basket 5 in stock. Please note that this item can only be delivered to UK addresses. Substrate:- Common plastics used to manufacture model kits including polystyrene and ABS. Application:- A cocktail stick is usually the most practical means of application. Run a small drop of Clearfix around the edge of the window then draw across the opening to produce a thin membrane. Drying Time:- 24 hours. How to clean:- Excess product should be wiped away using a damp cloth. Product is permanent once dry.