Is there anyway I can make it so when players leave they dont get 100% raid block?

Here is my config if you are confused 

{
"absoluteTimeScale": {
},
"activity": [
"input",
"loot",
"respawn",
"chat",
"wakeup"
],
"afkMinutes": 1,
"clanFirstOffline": false,
"clanShare": true,
"cooldownMinutes": 10,
"damageScale": {
"1": 0.2,
"12": 0.8,
"3": 0.35,
"48": 1,
"6": 0.5
},
"interimDamage": 0,
"minMembers": 1,
"playSound": false,
"prefabs": [
"door.hinged",
"door.double.hinged",
"window.bars",
"floor.ladder.hatch",
"floor.frame",
"wall.frame",
"shutter",
"wall.external",
"gates.external",
"box",
"locker"
],
"serverTimeOffset": 0,
"showMessage": true,
"sound": "assets/prefabs/weapon mods/silencers/effects/silencer_attach.fx.prefab",
"VERSION": "0.4.2"
}

What do you mean when players leave they don't raid block.? You config has a 10 min cool down with interimdamage set to 0 and your first hour set to 0.2. If you want a longer cool down before protection kickes in change the cooldown or if after cooldown you want the first hour protection change intrim damaged to what you like

So if I set intermdamage to .2 to will go from 100% to 80% correct?

correct if you set intermdamage to .2 it will be 80% protected from the cooldown expires until hour 1