Cheap Lee Valley Akfix Seal Max Acrylic Sealant

A reliable all-around crack and joint filler for indoor and outdoor applications, this universal acrylic sealant is especially effective at sealing molds for large epoxy pours.

It withstands weather and temperature fluctuations, remaining stable throughout freeze/thaw cycles. It has a thick consistency, so it holds its shape when applied and resists sagging, cracking or shrinking. Paintable after around 25 minutes, it is mold and mildew resistant after curing.

Easy to apply and clean up, it adheres well to porous materials (including wood, concrete and brick).