Prime IT FP as an additive, has been designed to give enhanced performance to the ULTRA TILE adhesives & grouts that have not been previously polymer modified. As an acrylic surface conditioner, it is suitable for a variety of building substrates, including plaster, timber, brick & block work (ie. porous surfaces). Versatile & durable Increases bond strength Improves water resistance Improves flexibility Seals & primes Use with porous substrates