The Cromar C3 External Fillet corner is a hot press moulded GRP pre-formed external corner that removes the need to mitre corners of D260 fillet trim.

Instructions:

• The corner should be nailed to the deck at both the corner and in the middle.
• Seal the joint between the trim and sealant using PU sealant.
• Any excess sealant should be removed.
• The joint should now be bandaged with 75mm wipe glassfibre mat.