Silicon Mastic for Concrete Expansion Joints- Shrink Resistant Mastic to seal expansion joints in imprinted or plain concrete (available in Translucent, Black or Brown - Translucent will visually darken over time) Silicone mastic sealant to fill expansion joints in imprinted concrete Mastic sealant available in Translucent, Black and Brown. Premium quality low modulus non corrosive silicone sealant that adheres to all concrete substrates. (average 7-10 linear metre coverage)Primarily used on imprinted concrete driveways and patios to avoid expansion joints becoming clogged up and filled with muck. Specifically designed to fill concrete expansion joints, tested to ISO11600 standards, easy application via mastic gun.
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