An Ethylene Chloride-Vinyl Acetate Latex based block filler especially formulated for use over “HOT” block and stucco . Anvil #345 provides a uniform base for application of more costly finish coats which would otherwise be absorbed by an unsealed surface requiring additional recoats to achieve uniform appearance. The unique properties of this product al-low it to lock in alkalinity , resist efflorescence, and deterioration caused by moisture. Anvil #345”HOT” Block Filler prevents “burn through” caused by high ph in ne stucco or masonry..