diff --git a/src/block/Air.php b/src/block/Air.php
index f5408c00bf..ae201328f0 100644
--- a/src/block/Air.php
+++ b/src/block/Air.php
@@ -31,7 +31,7 @@ use pocketmine\math\AxisAlignedBB;
 class Air extends Transparent{
 
 	public function __construct(BlockIdentifier $idInfo, string $name, ?BlockBreakInfo $breakInfo = null){
-		parent::__construct($idInfo, $name, $breakInfo ?? BlockBreakInfo::indestructible(0.0));
+		parent::__construct($idInfo, $name, $breakInfo ?? BlockBreakInfo::indestructible(-1.0));
 	}
 
 	public function canBeFlowedInto() : bool{
diff --git a/src/world/Explosion.php b/src/world/Explosion.php
index d750ee0ac2..db27b472e0 100644
--- a/src/world/Explosion.php
+++ b/src/world/Explosion.php
@@ -130,8 +130,9 @@ class Explosion{
 
 							$state = $this->subChunkExplorer->currentSubChunk->getFullBlock($vBlockX & 0x0f, $vBlockY & 0x0f, $vBlockZ & 0x0f);
 
-							if($state !== 0){
-								$blastForce -= ($blockFactory->blastResistance[$state] / 5 + 0.3) * $this->stepLen;
+							$blastResistance = $blockFactory->blastResistance[$state];
+							if($blastResistance >= 0){
+								$blastForce -= ($blastResistance / 5 + 0.3) * $this->stepLen;
 								if($blastForce > 0){
 									if(!isset($this->affectedBlocks[World::blockHash($vBlockX, $vBlockY, $vBlockZ)])){
 										$_block = $blockFactory->fromFullBlock($state);