Replaced my Marker Bulbs Today, a follow up question

We bought our first Motorhome, a 2005 Forest River Forester in November and I have now replaced about 85% of my bulbs with LED's. Today I replaced all 14 marker bulbs and have a question about resealing. In order to remove the lens I had to cut through some sealant and so now, I will need to reseal them. I have read somewhere about not using silicone sealant on the roof, but what about these marker lens caps. What is the best type of sealant to use?

Thanks in advance.