Gelcoat is available in 1L or 4L and comes in a variety of colours.
Gelcoat requires Catalyst MEKP at 2% to enable it to harden (SOLD SEPARATELY)
Catalyst guide (equates to 2% mixture plus extra if needed) :
1L of gelcoat can be purchased with 30ml MEKP Catalyst
4L of gelcoat can be purchased with 100ml MEKP Catalyst